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Showing posts with label fact. Show all posts
Showing posts with label fact. Show all posts

Sunday 15 May 2016

How Little do Experts Know- On Ranieri and Leicester, One Media Expert Apologises

In July of last year I may have written an article suggesting that the Italian was likely to get Leicester City relegated from the Premier League

 
Leicester City manager Claudio Ranieri lifts the Premier League trophy. Photograph: Carl Recine/Reuters


Marcus Christenson in The Guardian


No one likes to be wrong. It is much nicer to be right. In life, however, it is not possible to be right all the time. We all try our best but there are times when things go horribly wrong.
I should know. In July last year I sat down to write an article about Claudio Ranieri. The 63-year-old had just been appointed the new manager of Leicester City and I decided, in the capacity of being the football editor at the Guardian, that I was the right person to write that piece.




Claudio Ranieri: the anti-Pearson … and the wrong man for Leicester City?



I made that decision based on the following: I have lived and worked as a journalist in Italy and have followed Ranieri’s career fairly closely since his early days in management. I also made sure that I spoke to several people in Greece, where Ranieri’s last job before replacing Nigel Pearson at Leicester, had ended in disaster with the team losing against the Faroe Islands and the manager getting sacked.

It was quite clear to me that this was a huge gamble by Leicester and that it was unlikely to end well. And I was hardly the only one to be sceptical. Gary Lineker, the former Leicester striker and now Match of the Day presenter, tweeted “Claudio Ranieri? Really?” and followed it up with by saying: “Claudio Ranieri is clearly experienced, but this is an uninspired choice by Leicester. It’s amazing how the same old names keep getting a go on the managerial merry-go-round.”

I started my article by explaining what had gone wrong in Greece (which was several things) before moving on to talk about the rest of his long managerial career, pointing out that he had never won a league title in any country and nor had he stayed at any club for more than two seasons since being charge at Chelsea at the beginning of the 2000s.

I threw in some light-hearted “lines”, such as the fact that he was the manager in charge of Juventus when they signed Christian Poulsen (not really a Juventus kind of player) and proclaimed that the appointment was “baffling”.

I added: “In some ways, it seems as if the Leicester owners went looking for the anti-Nigel Pearson. Ranieri is not going to call a journalist an ostrich. He is not going to throttle a player during a match. He is not going to tell a supporter to ‘fuck off and die’, no matter how bad the abuse gets.”


Claudio Ranieri instructs his players during Greece’s defeat by the Faroe Islands, the Italian’s last game in charge of the Euro 2004 winners. Photograph: Thanassis Stavrakis/AP

Rather pleased with myself – thinking that I was giving the readers a good insight to the man and the manager – I also put a headline on the piece, which read: “Claudio Ranieri: the anti-Pearson … and the wrong man for Leicester City?”

I did not think much more of the piece until a few months later when Leicester were top of the league and showing all the signs of being capable of staying there.

After a while, the tweets started to appear from people pointing out that I may not have called this one right. As the season wore on, these tweets became more and more frequent, and they have been sent to me after every Leicester win since the turn of the year.

At some point in February I decided to go back and look at the piece again. It made for uncomfortable reading. I had said that describing his spell in charge of Greece as “poor” would be an understatement. I wrote that 11 years after being given the nickname “Tinkerman” because he changed his starting XI so often when in charge of Chelsea, he was still an incorrigible “Tinkerman”.

It gets worse. “Few will back him to succeed but one thing is for sure: he will conduct himself in an honourable and humble way, as he always has done,” the articles said. “If Leicester wanted someone nice, they’ve got him. If they wanted someone to keep them in the Premier League, then they may have gone for the wrong guy.”

Ouch. Reading it back again I was faced with a couple of uncomfortable questions, the key one being “who do you think you are, writing such an snobbish piece about a dignified man and a good manager?”

The second question was a bit easier to answer. Was this as bad as the “In defence of Nicklas Bendtner” article I wrote a couple of years ago? (The answer is “no”, by the way, few things come close to an error of judgment of that scale).

I would like to point out a few things though. I did get – as a very kind colleague pointed out – 50% of that last paragraph right. He clearly is a wonderful human being and when Paolo Bandini spoke to several of his former players recently one thing stood out: the incredible affection they still feel for this gentle 64-year-old.

All in all, though, there is no point defending the indefensible: I could not have got it more wrong.


At the start of this piece I said that no one likes to be wrong. Well, I was wrong about that too. I’ve enjoyed every minute of being embarrassingly wrong this season. Leicester is the best story that could have happened to football in this country, their triumph giving hope to all of us who want to start a season dreaming that something unthinkable might happen.

So thank you Leicester and thank you Claudio, it’s been quite wonderful.

Sunday 10 April 2016

Asking economists about staying in the EU is a dismally bad idea


Katie Allen in The Observer

Leaving or remaining in the union is about politics, history and much more. Yet we keep on consulting economists.

 
The government’s £9m publicity drive will no doubt quote economists’ views on what Brexit could mean. But should it? Photograph: Dan Kitwood/PA



Households in England can look forward to a 14-page booklet landing on their doormat this week, making the case for Britain’s remaining in the EU. Responding to criticism of the £9m publicity drive, which will eventually reach the whole of the UK, the government said a survey had shown that 85% of people wanted more facts about the referendum.

If it is facts we get, fair enough. Voters are being asked to decide on something that until recently they knew little about, and probably cared even less. Now, with less than three months to go to the poll, it’s little surprise people want a crash course in the pros and cons of EU membership. Understandably, many simply want to know whether they will be better or worse off if we leave.

And that’s where the “dismal science” steps in. But should it? Economics is seen as a great simplifier, and we all love simplicity when faced with a decision. Wouldn’t it be nice if economists could plug some numbers into a spreadsheet and come out with a cold, hard figure: how much Brexit might cost, or benefit, the UK?

Plenty of economists have tried, and their calculations have been lapped up by the media and campaigners alike.

Analysts at investment bank Credit Suisse say a vote to leave the EU would trigger a snap UK recession, prompt a fall in share prices and house prices and knock as much as 2% off GDP.

BlackRock, the world’s largest fund manager, has warned about potential losses to the exchequer if the financial industry is depleted by Brexit. If 10% of workers in financial services lost their jobs after a vote to leave, it says, the government could lose up to £3bn in annual employment taxes.

The CBI has gone further, seeking to pinpoint what each household would lose. Analysis it commissioned from accountant PricewaterhouseCoopers claimed that Brexit would cause a serious shock to the UK economy that could lead to 950,000 job losses and leave the average household as much as £3,700 worse off by 2020.

PwC examined two exit scenarios: one at the optimistic end of the range, and the other assuming difficult trade negotiations that eventually result in trade deals being concluded. It also said that much more pessimistic scenarios could be envisaged.

And therein lies the problem. No accountant or economist can tell voters what trade deals would be negotiated in the event of a vote to leave. Nor can they tell us what immigration rules will be hammered out, which international firms will leave Britain or how UK government bonds will fare on international markets.

Economists themselves would probably admit as much, given the chance. After all, devotees of this discipline are passionate about probability distribution tables and many-hued fan charts that map out potential outcomes. Robert Chote, chair of the government’s forecaster, the Office for Budget Responsibility, has in the past used a fan chart in tones of red and orange to show likely it thought the government was to meet its fiscal rule: Chote called it “the flamethrower of uncertainty”.

Harry Truman famously summed up his frustrations with wishy-washy advisers when he reportedly exclaimed: “Give me a one-handed economist. All my economists say, ‘on the one hand … on the other’.”

Yet still we turn to economists for answers, making oracles of people who can’t even agree on what the UK’s trend rate of growth is, who can’t predict what inflation will be from one month to the next – and who largely failed to predict the biggest financial crisis in living memory. Much as voters and politicians would like economics to be an objective way of quantifying the effects of staying in or leaving the EU, it is not.

There is a second problem with taking a purely economic approach to the Brexit debate: it tends to focus on the short term. But if people really believe the UK should not, for whatever reason, be part of the EU, they should accept some short-term disruption from a decision to leave.

Similarly, those who want to stay but worry about how much the UK pays to Brussels must accept that being part of the EU comes at a price. The decision cannot be based merely on near-term profit or loss.

Take the example of German reunification in 1990. Marrying two countries with vastly different productivity levels, work cultures and politics made little economic sense. The same went for the one-for-one exchange rate for ostmarks and deutschmarks. But it wasn’t about the economics – reunification was about history and politics. As former chancellor Willy Brandt put it: “What belongs together, will grow together.” More than a quarter of a century down the line, Germany is still growing together, the economies of east and west still struggling to run to the same rhythm. But that does not make reunification a mistake.

One thing that Remain campaigners are right about is that leaving the EU would be a “leap in the dark”. Or as Airbus executives told staff in a letter warning against Brexit: “We simply don’t know what ‘out’ looks like.”

No country has ever left the bloc. That puts the onus on Leave campaigners to come up with more than reassurances that it will all be OK. But those on the other side do themselves and the dismal science few favours by bandying around flaky figures.

Thursday 14 May 2015

The troubling flaws in forensic science

by Linda Geddes in BBC Future

“It has long been an axiom of mine that the little things are infinitely the most important.” So said the fictional detective, Sherlock Holmes. Armed with his finely honed skills of backwards reasoning, his trademark ability to solve unsolvable crimes often hinged on his revealing evidence too small to be noticed.
Holmes was an inspiration for the very founders of modern day forensic science. As the decades passed and the tools in their armoury grew, so too did the sheen of invincibility that surrounded their discipline. But there was a crucial chink in their methods that had been overlooked: subjectivity.
While the likes of Holmes’s successors in detective fiction may lead us to believe that forensic evidence is based on precise deduction, all too often it relies on a scientist’s personal opinion, rather than hard fact.
Science on trial
Consider the following case. In December 2009, Donald Gates walked out of his Arizona prison with $75 and a bus ticket to Ohio. After serving 28 years for a rape and murder he didn’t commit, he was a free man. Now the spotlight began to shift to the forensic technique that put him there: microscopic hair analysis.
Human hair is one of the most common types of evidence found at crime scenes. During the 80s and 90s, forensic analysts in the US and elsewhere often looked to the physical differences between hairs to determine whether those found at a crime scene matched hairs from a suspect – like Donald Gates.
When he stood trial in 1982, an FBI analyst called Michael Malone testified that hairs found on the body of the murder victim – a Georgetown University student called Catherine Schilling – were consistent with Donald Gates’ hairs. He added that the probability they came from anyone else was one in 10,000.
“That’s very compelling evidence, particularly when it comes from a witness wearing a white laboratory coat,” says Peter Neufeld, co-founder of the Innocence Project, a New York-based non-profit organisation that uses DNA evidence to overturn wrongful convictions.
DNA testing evidence on a pair of trousers
The FBI is now reviewing several thousand cases as DNA testing sheds new light on the truth (Credit: Getty Images)
However, hair analysis is not purely objective; I might think two hairs look identical, but you might disagree. Even if we agree that two hairs match, no-one has ever figured out how many other hairs might be similarly indistinguishable from one another. “When a person says that the probability is one-in-10,000, that’s simply a made-up number,” says Neufeld. “There’s no data to support it.”
Donald Gates was finally exonerated when DNA testing revealed that the hairs didn’t belong to him after all. Two similar exonerations followed soon afterwards. As a result of these cases, the FBI is now reviewing several thousand cases in which its scientists may have offered similarly misleading testimony. Last month, it announced that of the 268 cases it has reviewed so far that went to trial, 96% them involved scientifically invalid testimony or other errors by FBI agents. Among those convicted, 33 received death sentences, and nine have already been executed.
The FBI’s review won’t necessarily overturn the convictions, but it does mean that they need to be reconsidered carefully. Lawyers scrutinising these cases must work out what other evidence was presented in court; if they hinged on flawed hair testimony, retrials and exonerations may follow. In cases where the original physical evidence still exists, that DNA testing may shed new light on the truth.
Damning report
Even trusted lines of evidence, such as fingerprint analysis, are not water-tight. Research has shown that the same fingerprint expert can reach a different conclusion about the same fingerprints depending on the context they’re given about a case.
Based in part on these findings, in 2009 the National Academy of Sciences in the US published a report on the state of forensic science. Commissioned in response to a string of laboratory scandals and miscarriages of justice, its conclusions were damning. “Testimony based on faulty forensic science analyses may have contributed to the wrongful conviction of innocent people,” it said. “In a number of disciplines, forensic science professionals have yet to establish either the validity of their approach or the accuracy of their conclusions.”
The report was a wake-up call, not just for forensic scientists in the US, but around the world. “What it exposed were significant scientific deficiencies across many of the different methods that we use, both to examine and interpret different types of evidence,” says Nic Daeid, a professor of forensic science at the University of Dundee in Scotland. 
Of all lines of forensic evidence, DNA analysis was considered to be the most objective. Resting on complex chemical analysis, it seems stringently scientific – a gold-standard for how forensic science should be done. Yet perhaps juries should not be too quick to trust the DNA analyses they see in court.
Fingerprints on a sheet of paper
Even trusted lines of evidence, such as fingerprint analysis, are not water-tight (Credit: Thinkstock)
In 2010, while working as a reporter for New Scientist magazine, I teamed up with Itiel Dror from University College London, and Greg Hampikian from Boise State University in Idaho, to put this idea of DNA’s objectivity to the test.
We took DNA evidence from a real-life case – a gang-rape in Georgia, US – and presented it to 17 experienced analysts working in the same accredited government lab in the US.
In the original case, two analysts from the Georgia Bureau of Investigation concluded that the man who was ultimately convicted of the crime, Kerry Robinson, "could not be excluded" from the crime scene sample, based on his DNA profile. But when the evidence was shown to our 17 analysts, they reached very different conclusions; just one analyst agreed that Robinson "cannot be excluded". Four analysts said the evidence was inconclusive and 12 said he could be excluded.
Yet just because forensic science is subjective, this doesn’t mean it should be disregarded; it can still yield vital clues that can help to catch and convict murderers, rapists, and other criminals. “Subjectivity isn’t a bad word,” says Dror. “It doesn’t mean that the evidence isn’t reliable, but it is open to bias and contextual influences.”
Blind judgement
What’s needed are additional safeguards to shield forensic examiners against irrelevant information that might skew their judgement. A first step is to ensure they aren’t given irrelevant information, such as knowing that witnesses have placed the suspect at the crime scene, or that he has previous convictions for similar crimes. Another safeguard is to reveal the relevant information sequentially – and only when it is needed. “We need to give them the information that they need to do their job when they need it, but not extra information that’s irrelevant to what they’re doing and which could influence their perception and judgement,” says Dror.
In the US at least, this is starting to happen: a national commission on forensic science has been established, with the goal of strengthening the field – and this includes looking at human factors like cognitive bias. But similar strategies are needed elsewhere if forensic science is to rebuild its tattered reputation.
When it comes to deduction and proof, there is still much we can learn from Arthur Conan Doyle’s hero. As Sherlock Holmes also once said: "Eliminate all other factors, and the one which remains must be the truth."

Wednesday 2 July 2014

Is the cost of standing up for principle too high? Of fact, procedure, and principle

by Peter Ronald Desouza in The Hindu


Is the cost of standing up for the principle too high, or is it necessary to stand up for them regardless of the cost since it would take society to new and higher morality?


Like all things Indian, small events appear to have large implications. The curious Indian, with a few thousand years standing behind her, finds connections and controversies in everything. Questions naturally appear. For example, does the Gopal Subramanium elevation controversy have wider implications for the polity? Must we see it as telling us something about our public culture or is it just a one-day spectacle, permitting us, now that it has passed, to go back to business as usual? Is the nonchalance on the issue because of fear or because of indifference? Because legal practitioners have dominated the debates so far, we have been cautious since this is a zone where angels fear to tread. But when the demons of doubt will not go away, the issues require detailing. These concern matters of fact, of procedure, and of principle.
The process


Let us begin with the facts. The practice followed by the collegium of the higher courts, before a candidate is recommended for elevation and a panel of names is sent to the government for appointment, is as follows. The Chief Justice initiates a consultation with the legal fraternity. Speaking in confidence to senior advocates and fellow judges, to both the bar and the bench, a long list of possible candidates for elevation is prepared. Based on these recommendations the Chief Justice then invites the candidates to determine their willingness to be considered. If the candidates are willing then they are required to furnish details about themselves, such as their contributions to the law especially with respect to important cases, the extent of their legal practice, their annual income, their legal history, etc. These details are then processed by the court administration, during which time, I suppose, the court gets inputs from relevant investigating agencies about whether they have any legal proceedings against the candidate, etc. other inputs that may make them ineligible for consideration.
Based on (i) the recommendations of the legal fraternity, (ii) the willingness of the candidate, and (iii) the hard data relating to the legal practice and public standing of the individual, the file is placed before the collegium. The collegium then scrutinises the information on record and, based on the highest standards of judicial scrutiny, arrives at a decision on whom to recommend and whom to ignore, from the names before it. Not every name that comes up through this process gets the approval of the collegium. The shortlist prepared by the collegium is then sent up to the government for its approval. This I am told is the standard process that is followed. Gopal Subramanium’s case, I suppose, went through the same process.
There are many issues that need clarification now. Let us list them here. Let us begin with the issue of sequence. (i) When was the collegium’s due diligence completed? (ii) When did it send its recommended panel of names? (iii) When did the Central Bureau of Investigation (CBI) and the Intelligence Bureau (IB) give their reports which made him ineligible? (iv) Was it before the collegium considered the file, or after? (v) If before, were the intelligence reports presented to the collegium? (vi) If yes, then assuming that the reports were considered by the collegium, can they be regarded as germane to the appointment after the panel is sent to the government? (vii) If not, why were they concealed from the collegium? (viii) Does it constitute contempt by the CBI and the IB of the Supreme Court? (ix) When was the file sent to the President for his seal of approval? (x) How long did he take to grant approval? (xi) What were the reasons he gave to segregate the names into those he had approved and those that were to be kept in abeyance? (xii) Since this act of segregation has constitutional implications, did the President consult constitutional experts, as is the practice, or did he rely on his own wisdom? (xiii) If he did consult constitutional experts, who were they and what was their advice, and if he did not why did he not do so?
Fair and transparent


The principle for such empanelment was enunciated by the Supreme Court in the case of P.J. Thomas, nominee for the Central Vigilance Commission (CVC), whose candidature was rejected in 2011 when it described in detail the process to be followed in the appointment to a position of authority. Appointments to the Supreme Court, I expect, fall into this category. Here is what the judgment said — (vi) The empanelling authority, while forwarding the names of the empanelled officers/persons, shall enclose complete information, material and data of the concerned officer/person, whether favourable or adverse. Nothing relevant or material should be withheld from the Selection Committee. It will not only be useful but would also serve larger public interest and enhance public confidence if the contemporaneous service record and acts of outstanding performance of the officer under consideration, even with adverse remarks is specifically brought to the notice of the Selection Committee. (vii) The Selection Committee may adopt a fair and transparent process of consideration of the empanelled officers.
Complete information, including fair and adverse comments, is a necessary condition. Also fair and transparent process. I suppose the collegium, the government and the President followed these guidelines.
Separation of powers


Assuming complete information was available to the collegium, we now have to consider the contrasting positions of the collegium and the government. Based on the same facts considered by the collegium, the government is at liberty to give an alternative reading and argue for the unsuitability of a particular candidate. This is legitimate since the political lens of the government may be at variance with that of the collegium. The disagreement, at this stage, has to be on political grounds and not on facts. The procedure then requires the government to place its disagreement before the collegium which can either restate its earlier recommendation or revise it in the light of the arguments made.
This second stage is constitutionally sacrosanct since contained in it is the core principle of the separation of powers. The collegium has to deliberate on this contrary opinion of the government and decide whether, by accepting or rejecting it, the independence of the judiciary is eroded or enhanced. The decision that emerges from this review must indicate where the power of decision in the last instance, lies, with the government or with the court. Both parties must give clear reasons for their positions so that the final decision taken can educate the public on the core issue of separation of powers. The government’s reasons and the collegium’s views, as well as the facts of the matter, should be made public to serve, as the Supreme Court in the P.J. Thomas case said, the larger public interest.
We now come to the question of suitability. Was Gopal Subramanium unsuitable because of some “actions” of his, which were not kosher, i.e., meeting persons that he should not have met when he was Solicitor General, or was he unsuitable because of a “disposition,” i.e., shutting his mind out for an hour and praying as he was alleged to have done when he was investigating the Sree Padmanabhaswamy temple gold case? From leaked reports in the press it appears that both “actions” and “disposition” made him unsuitable. This is puzzling. How was he then the lead counsel of choice for both the IB and the CBI? How was he amicus curiae for the Supreme Court in several cases such as the Bachpan Bachao Andolan case, the Sohrabuddin Sheikh fake encounter case, and the Sree Padmanabhaswamy temple case. If he was good enough to be amicus curiae, why is he unsuitable now?
Basic issues for democracy


Three basic issues for our democracy emerge from this controversy. The first is the issue of public attitude. Are we prepared to let it lie, to blow over because another headline has grabbed its place or are we prepared to interrogate it further? This is not a partisan issue, of UPA versus NDA, since it perhaps points to a growing disregard for our constitutional culture. When the confidentiality of the collegium’s recommendation is treated lightly, when the intelligence reports are leaked, when the President’s confidential actions are public knowledge, we have reason to be concerned about the disregard for constitutional propriety. Will those who leaked information be punished to restore the sanctity of the process? Or are we moving toward what Paulo Friere calls the “culture of silence”?
The second issue concerns the doctrine of separation of powers. By segregating the names, did the President give primacy to the executive over the judiciary? Was this a question of political expediency trumping constitutional principles? With whom should the final decision, on who should be elevated, lie? The executive or the judicial fraternity? Since the Emergency, when it had touched its nadir, our democracy has been struggling to restore the balance between the executive and judiciary. Does the Gopal Subramanium case suggest that the pendulum has begun to swing again?
The third issue concerns Gopal Subramanium’s withdrawal of consent. By resigning he prevented the issue from developing into a constitutional face-off between the executive and the judiciary. Ronald Dworkin, the great legal and political philosopher, in Taking Rights Seriously, recommends such a face-off since he believes that only in such a situation will we be able to distinguish between just and unjust laws. We hope that the moment has not passed for the collegium to enunciate on the principle of finality. Mr. Subramanium’s withdrawal also highlights one of the knottiest problems of political philosophy. Should he have been pragmatic, and withdrawn to fight another battle, or principled, since a foundational principle was at stake? Is the cost of standing up for the principle too high, undermining other values that are also important, or is it necessary to stand up for them regardless of the cost since it would take society to new and higher morality?
Aung San Suu Kyi did not go to England to see her husband who had terminal cancer, when she was offered the choice, because she would have had to abandon the political struggle and leave the country. He passed away. She did not meet him. Yudhisthira told a little lie and won the war.

Tuesday 22 April 2014

Understanding Risk - Risk explained to a sixteen year old



By Girish Menon

Risk is the consequence one has to suffer when the outcome of an event is not what you expected or have invested in.

For e.g. as a GCSE student you have invested in getting the grades required by the sixth form college that you wish to go to.

The GCSE exam therefore is the event.

From an individual's point of view this event has only two possible outcome viz. you get the grades or you don't.

Your investment is time, money and effort in order to get the desired outcome.

The risk is what you will have lost when despite all your investment you did not get the desired grades and hence you are not able to do what you had wanted to do.

From a mathematical point of view since there are only two possible outcomes one could say that the probability of either outcome is 0.5.

Your investment with spending time studying, taking tuitions, buying books.... are to lower the probability to failure to as low a figure as possible.

Can you lower the probability of failure to 0? Yes, by invoking the ceteris paribus assumption. If all 'other factors' that affect a student's ability to take an exam are constant, then a student who has studied all the topics and solved past papers will not fail.

Else, some or all the 'other factors' may conspire to bring about a result that the student may not desire. It is impossible to list all the 'other factors' and hence one is unable to control them. Hence, the exam performance of even a hitherto good student remains uncertain.

If the above example, with only two possible outcomes, shows the uncertainty and unpredictability  in the exam results of a diligent student then one shudders to think about other events where all the outcomes possible cannot be identified.

Let's move to study the English Premier League. Here, each team plays 38 matches and each match can have only three outcomes. When one considers picking a winner  of the league one could look at the teams, the manager etc. But, 'other factors' such as injury to key players, the referee...... may scupper the best laid plans.

When one looks at investing in the shares of a company one may study its books of accounts. Assuming that these books are accurate, this information may be inadequate because it is information from the past and the firm which made a huge killing last season may now be facing turbulent conditions of which you an outside investor maybe unaware of. The 'other factors' that may impinge on a firm's performance will include the behaviour of the staff inside the firm, behaviour of other firms, the government's policies and even global events.

Yet, as a risk underwriter one has to take into account all of these factors, quantify each factor based on its importance and likelihood of happening and then estimate the risk of failure. The key thing to remember is that the quantitative value that you have given each factor is at best only a rough estimate and could be wrong. Which is why every risk underwriter follows Keynes' dictum, 'When the facts change, I change my mind'. George Soros, the celebrated investor, has been rumoured to say no to an investment decision that he may have approved only a few hours ago.

Even if Keynes and Soros may have changed their minds on receipt of new information I am willing to bet that their investment record will show many wrong decisions.

So if the risk in investment decisions itself cannot be accurately predicted imagine the dilemma a politician makes when he decides to take his nation to war.


Hence the best way sportsmen, businessmen and politicians overcome the uncertainty of decision making is by posturing. Pretending that you are the best and everything is within your control. They hope that this will scare away the challengers and doubters and victory becomes a self fulfilling prophecy. Alas! It unfortunately does not work every time either. 

(The author is a lecturer in economics.)

Monday 24 March 2014

Why the BCCI won't be swayed by Richardson's DRS claims


The ICC's CEO hopes to get India on board and backing the review system, but that doesn't look likely to happen
Martin Crowe in Cricinfo
March 24, 2014
 

How can there be a zone of certainty for something that never happened? © BCCI
David Richardson, the CEO of the ICC, runs world cricket from an executive position. He also set up and designed the one and only DRS, which is sometimes nicknamed the David Richardson System.
The roots of this experiment with technology date back to 2007, when Richardson was the ICC's general manager. Following the awful Monkeygate controversy in Sydney in 2008, when umpiring howlers dominated a nasty contest between Australia and India, Richardson fast-tracked the DRS to avoid any further outcry for technology to help the umpires in the middle. It made sense; umpiring mistakes followed by copious replays, enabled by technology, of those mistakes, were killing the spirit of the game. That nasty series was the watershed. Enough was enough.
In mid-2009, the launch of Richardson's system was hastily arranged in time for the Sri Lanka v India series. For some reason they chose not to use the highly credible Hawk-Eye technology and instead went with a rookie rival, Animated Research Limited, a New Zealand-based operation. The result was a disaster. The details are well documented. The upshot was that India, rightly, condemned the predictive path used, and the conditions of the player challenge.
Since that ill-fated start in Sri Lanka, the DRS has spluttered along, accompanied by a mixture of embarrassment and the inevitable spin that all is well. Apparently, according to Richardson himself, the percentage of correct decisions has risen, but that is going by the rules of the system itself, which, with its "zones of certainty" concept, offers flawed predictions. Hardly an accurate measure for basing statistics on. Overall, the system has lacked credibility, and the BCCI has been the only one to consistently point this out.
Last week, however Richardson seemed to pre-empt a BCCI about-turn, based on his convincing former India captain Anil Kumble, who is on the ICC's technical committee, and also the upcoming appointment of N Srinivasan as ICC chairman. Kumble, who was critical of the DRS back when it first appeared is now seen as an easy pushover, ensuring that Richardson finally gets full global approval for the system.
Kumble is an independent, astute, balanced, outstanding man and player, well respected in the world game. I had the privilege of working with him in 2008, in the first IPL, and over the next few years on the MCC World Committee. Without question, he will be true to his beliefs. As for Srinivasan, nothing seems to faze him, and his opposition to the system has been unyielding.
Two things stand out. Firstly, it is inconceivable that Kumble, or the BCCI, will buckle. Secondly, the system is so flawed that the only long-term solution is to bin the dog's breakfast it is, and start from scratch.
The flaws have been well debated. The predictive path is never going to be bulletproof, and it often shows trajectories significantly different to those that would have come to pass. After all, the system is operated by humans.
The player-challenge rules are ridiculous, with two gambling chips offered for either side, slowing the game down and continually disrespecting the umpires' ability.
 
 
The player-challenge rules are ridiculous, with two gambling chips offered for either side, slowing the game down and continually disrespecting the umpires' ability
 
Take a look at an imaginary scenario, of the sort often seen in Tests now (although not necessarily off consecutive balls as described below).
A batsman is hit on the pad and is given out. Knowing it's a 50-50 call, that he is a key batsman, and that his team has two unsuccessful challenges, he decides to review. The ball-tracking predictive path shows the ball clipping the leg stump by a whisker, so with the benefit going to the umpire, and not the batsman, the lbw is upheld. The batsman walks off convinced there was doubt about might have happened. He's convinced if the DRS wasn't in use, he would have been given the benefit of doubt, so he rues the system. The umpire himself learns that it only just clipped the top of the leg stump. He is relieved, yet also perhaps startled at how close it was, and put in two minds, remembering that in the pre-DRS days, it was the batsman who usually got the benefit of any doubt.
With the next ball, the new batsman receives the same delivery. He is hit on the pads, and this time, after much rumination, is given not out by the same umpire. The fielding captain, knowing it's 50-50 and that he has two unsuccessful challenges left, decides to review. The predictive path shows the ball just clipping the leg stump, not inside the "zone of certainty", so the review is turned down, the batsman and the umpire getting the benefit, the fielding side losing a challenge. The batsman previously given out is watching in the dressing room as he undoes his pads. He's fuming.
Next ball, there is another shout for lbw. Again, it looks similar to the one before, so the umpire gives it not out. The fielding captain, knowing he has one unsuccessful challenge left, decides that again it's worth the gamble to remove this key new batsman, so calls for another review. The predictive path shows the ball just hitting leg stump, but a little closer to the middle of the stump. In fact, when it's zoomed in really close, it has hit the leg stump only a fraction inside where the previous ball struck. But as it is hitting the centre line of the stump, and is therefore inside the "zone of certainty", the third umpire must tell the umpire in the middle to reverse his decision and give the batsman out. The umpire in the middle crosses his arms and raises his finger. The batsman and umpire have both been denied the benefit, while the fielding captain is cock-a-hoop because his gamble has paid off. On top of that, he keeps his one remaining challenge alive.
In three balls you have a snapshot of the ridiculous system the ICC has hung its hat on. Zone of certainty? For something that never happened, was simply predicted? No wonder so many players think it is flawed - though they rarely say it out loud in case of retribution. Also, it is little wonder the fans think it's madness, because it's confusing, complex and often contradictory.
The DRS as it is needs to be scrapped. Instead, why not sit down with everyone's interest and opinion tabled and we might see the following, or something similar.
One unsuccessful challenge per team per innings. The clear direction to all players will then be that the only time the system should be used is when an embarrassing mistake has been made that should be overturned for everyone's sake. In other words, the players are protecting the umpire. The system is not for personal or team tactical use. That would be regarded as going against the spirit of the game and the umpires.
This way, the game keeps moving, whereas if the third umpire was given the exclusive role of reviewing, he would be doing it every time, including for any 50-50 calls, for fear of been hauled up and exposed for not getting every single decision right. This would only slow the game down more, and cricket is already an incredibly slow sport. In truth, all sports can't ensure all decisions are accurate; that is part of their beauty. What is important is to remove embarrassment, to protect the umpire and the player on the wrong end of such a howler.
No predictive path is necessary. The trajectory that is forecast never came to pass in reality. It is subjective to the umpire and his expertise, and is part of cricket. To remove the howler, Hot Spot and real-time Snicko, along with super slo-mo replays can do the job.
The technology that should be used is the actual path and the virtual mat. That is accurate to a few millimetres and is sufficient to assist the umpires with line calls regarding balls pitching outside leg or hitting outside off, just as it does for line calls for stumpings and run-outs, and as in tennis.
Alas, Richardson is incredibly stubborn. There isn't a chance in hell he will back off his own creation, and hence the ongoing stalemate. He is hoping to sway Kumble, Srinivasan, and the BCCI, with spin. One would imagine that Kumble knows bad spin from good more than anyone. Richardson is up against a resolute, enduring opponent. He, for one, has a shelf life, and the BCCI, which isn't going anywhere, won't budge an inch. The stalemate will continue.

Friday 21 February 2014

DONIGER - In defence of the offensive


VASUNDHARA SIRNATE in the hindu


The right to free speech and expression also includes the right for people to be exposed to differing points of view. Book purges have been a staple of regimes trying to establish authority by ensuring that there can be no criticism against them


In Ray Bradbury’s 1953 novel Fahrenheit 451, the main protagonist, Guy Montag, is a “fireman” whose task is to burn all books. Set in a fictional town in the American Mid-West, Fahrenheit 451 is about a society where “firemen” hunt people who hide books, raze their houses and burn all literature. Out of curiosity, one day Montag steals a copy of the Bible from the house of an old woman, who chooses to set herself aflame along with her books in an act of defiance. Shocked by the incident, Montag begins to read, eventually joining a group of drifters that memorise books for a futuristic time when society will need books again.
Responses to literature

Mr. Bradbury’s inspiration for Fahrenheit 451 came from three diverse political phenomena that preceded the novel. The first occurred on May 10, 1933 when members of the German Students Union burned a reported 25,000 books written by Jewish, French and American authors that were considered subversive, anti-National Socialism and un-German. The second phenomena was the Great Purge conducted by the Stalinist regime in the Soviet Union when many anti-communist thinkers, writers and philosophers were arrested and executed along with thousands of peasants in an attempt to consolidate the communist regime. The third was the formation of the House Un-American Activities Committee in 1938 that blacklisted the Hollywood Ten — a group of scriptwriters and directors thought to be sympathetic to communism.
I invoke Mr. Bradbury’s book precisely because the incidents that inspired him crossed the boundaries of political ideologies suggesting that many varying regime types have the capacity to censor free speech and expression. By caving in to Dinanath Batra’s call to ban Wendy Doniger’s book The Hindus: An Alternative History, it has become ‘reasonable’ for a group of individuals to hold metaphorical knives to the necks of established academics engaged in research. By effectively banning this book, Mr. Batra and Penguin India are encroaching on the Freedom of Speech and Expression because the right to free speech also includes a right for people to be exposed to differing points of view. To quote the Indian Supreme Court’s judgment in Union of India vs. Association for Democratic Reforms, “One sided information, disinformation, misinformation and non-information, all equally create an uninformed citizenry which makes democracy a farce. Freedom of speech and expression includes the right to impart and receive information which includes freedom to hold opinions.”
Book purges and burnings have been a staple of regimes trying to establish authority and legitimacy by ensuring that there can be no criticism against them. Salman Rushdie, another proscribed author, writes about becoming Joseph Anton — borrowed from Joseph Conrad and Anton Chekhov — in his memoir. He says that an Iranian man on his deathbed, Ayatollah Khomeini, who hadn’t even read his book, banned The Satanic Verses. A fatwa was issued and Rushdie lived his life under the constant threat of being murdered for writing some brilliant prose and upsetting Muslims.
A call for action

The pulping of Dr. Doniger’s book is the latest in a steady stream of books that have been similarly treated because, it is claimed, such books offend communities. I offer here a slightly different argument in defence of her book. Dr. Doniger’s book does not do Hinduism a disservice. It is a call for action against the historical priestly expurgations that have accompanied the evolution of Hindu epics and history. She re-injects the lost narratives of Dalits, women and other lower castes — narratives that were removed by design by some male Hindu priests who sanitised the books to suit their agendas. In order to dislike a book one first has to read it. Mr. Batra’s petition has encouraged mob behaviour where Hindus, who don’t even know what’s in the book, are now participating in the rising Indian Cult of the Offended.
At its foundation, religion is mostly about trusting the unknown. It is about handing one’s resolve to some being that may or may not exist, to accept individual fate as something decided by powers outside one’s control and by regaining that control over one’s life through meditation, prayer and charitable deeds. Nowhere does Hinduism say that to reinforce and express one’s faith Hindus must destroy books that are deemed offensive. Nowhere does Hinduism say that one cannot use Freudian analysis as a theoretical frame to comment on the structure and history of Hinduism. In fact, the very basis of Hinduism, and what has made it persist, is its ability to incorporate varying critical arguments that have broadened the scope of the religion.
The objections to Dr. Doniger’s book come because she injects sex and lust into Hinduism by reclaiming desire as an important, yet hidden, story arc in Hindu texts. Anyone who knows Dr. Doniger or has attended her lectures will know that she has a witty style of writing and presentation. She often uses modern metaphors to explain her point about Hinduism and sees humour and meaning even in incidents where she has been attacked, one notably where an audience member threw an egg at her. Much of her writing uses anachronisms to describe epic characters and storylines.
There is nothing wrong or offensive about this. Other critics have also argued against Dr. Doniger’s books because they don’t agree with her point of view. This is called academic debate. Debate and discourse is how societies try to push thinking about issues and circumstances to other levels. The truth is Hinduism does have a rich transcript of desire. Hindus are free to argue against it and say it is embarrassing or they can take pride in it for having such an openly sexual past. Either way, one can pulp a few books, but it is virtually impossible to suppress a book in the digital age, and second, one cannot really brush a temple like Khajuraho under the carpet in the vain hope that no one will notice the naughty bits carved into the walls.
Rise of the right wing

Dinanath Batra, a former school principal and the founder of the Shiksha Bachao Andolan Samiti, is offended by the book. He also asks if Muslims can ban books that offend them, why not Hindus? Most Hindus he claims to speak for have not read the book because it is written in English and is over 600 pages long. If we square this away with our literacy rates, it seems unlikely that more than a fraction of the very diverse Hindu community has been able to access the book. From this set, many have spoken out against the book but have done so through the written word, not by a call to ban the text. Mr. Batra has chosen to speak for a very diverse set of people counting on the fact that they will not look at the book themselves and make up their minds. His organisation attacked Dr. Doniger, by saying that she is driven by “Christian Missionary Zeal and hidden agenda to denigrate Hindus and show their religion in poor light.” On the contrary, Dr. Doniger wants to show that Hinduism was and is much more than a written record of priestly literature. She shows how the forgotten people, the oppressed and the women whose voices were silenced under an overarching control by male priests and their translations were in fact crucial to the formation of modern Hinduism. She gives these voices a place of respect and dignity in the existing Hindu narratives.
Mr. Batra stated in one interview that he wanted “Indianness” in the field of education and was on a mission to purify the minds of the youth and keep them free from “corruption” (read Westernisation). For all his rhetoric, he seems to have missed one central point – in a country as diverse and as rich in divergent cultures as India, he barely has the right to speak for his own neighbourhood let alone all Hindus across the world. What is most disconcerting is that Penguin India has kowtowed to this act of bullying citing that it has a responsibility to protect its employees from threats.

These threats do not come from a court order or a fatwa, as Arundhati Roy crucially has pointed out. These threats come from groups in society that want to advance a carefully constructed purist vision of a Hindu nation, knowing full well that their hand will be strengthened by the possible and perhaps pre-eminent electoral emergence of a right-wing party. It is these same groups that beat up couples on Valentine’s Day, attack women in nightclubs, and impose dress codes on women for no good reason, except that a woman’s knees or armpits somehow offend them. The problem, from my perspective, is that the capturing of the corridors of power by a right-wing party strengthens groups in society with a narrow vision of modernity, a deep dislike of intellectual freedom, a commitment to sanitise Hindu history, and to persist in an unabashed encroachment on the rights of others.

Friday 26 July 2013

The DRS problem: it's not the humans stupid


Kartikeya Date 

The controversial Trott decision: what many observers don't get is that it wasn't actually the third umpire who made the final call  © PA Photos
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The DRS is a system in which umpiring decisions can be reviewed by players. Events on the field can also be reviewed by umpires in some circumstances before a decision is made. A widely held view about recent problems with the system is that while the DRS is fine, the way it is used by players, and on occasion by umpires, has caused difficulties.
I hold the view that the problem, if there is one, is with the system, not with the way it is used. The way the system is defined strictly determines the way it is used.
The DRS system I refer to is described in detail by the ICC in its Playing Handbook (pdf). It is worth clearing up a few misconceptions at the outset.
The TV umpire does not overturn a decision under the DRS. The TV umpire is explicitly prohibited from discussing whether or not a particular appeal should result in an out or a not out. Further, there is no standard in the DRS requiring "conclusive evidence to the contrary" to overturn a decision, as many commentators are fond of telling us.
The rules make only three points. First, the TV umpire must limit himself to the facts. Second, if some of the evidence requested by the umpire on the field does not permit a conclusion with "a high degree of confidence", the TV umpire should convey to the umpire on the field that a conclusive answer is not possible (the conclusion in this case is not the decision itself but about individual points of fact potentially influencing it). Finally, if some information is not available to the TV umpire, he is required to report this to the on-field umpire. He is also required to provide all other evidence requested by the on-field umpire. If we go by the ICC's DRS rules, at no point in the review process is the TV umpire required to provide a definitive conclusion by putting together all the evidence.
The Guardian reported that the ICC did admit to a protocol error in the way the umpires addressed Australia's review in Jonathan Trott's first-ball lbw dismissal in the second innings at Trent Bridge. The ICC has declined to say what the protocol error was, citing a long-standing policy of not revealing communication between umpires. A number of observers think that the absence of one Hot Spot camera angle should have automatically meant that the outcome of the review should have been inconclusive, allowing Dar's original not-out decision to stand. I think this is a misreading of the ICC's DRS rules.
Let's reconstruct the case of Trott. Umpire Erasmus in the TV umpire's box would not be asked "Is Trott LBW?", or even "Did Trott hit the ball with the bat?" Going by the ICC's rules, he would be asked a different series of questions. Does Hot Spot show a touch? No. Does the replay show a touch?Inconclusive. No clear evidence of a deviation. (Some people have argued that there was evidence of deviation on the replay. I disagree. As did Michael Atherton on live commentary.) Does the square-of-the-wicket Hot Spot show a touch? This angle is unavailable. Can you hear any relevant sound on the stump microphone? Inconclusive. Did the ball pitch in line? Yes. Did it hit the pads in line? Yes. Does the ball-track predict that it would have hit the stumps?Yes.
According to the rules, Erasmus would be prevented from providing probabilities or maybes. It would have to be yes, no, or can't say. After getting all these factual responses from Erasmus, Dar would have to make up his mind. Did what he heard from Erasmus merit reversal? As we know, he decided that it did. The protocol error could have been that Erasmus neglected to mention that one of the Hot Spot angles was unavailable. It could also have been that Dar weighed all the facts Erasmus provided to him incorrectly and reached the wrong conclusion, though it is difficult to construe this last possibility as a protocol error, since the protocol explicitly requires the on-field umpire to exercise judgement, which is what Dar did. "The on-field umpire must then make his decision based on those factual questions that were answered by the third umpire, any other factual information offered by the third umpire and his recollection and opinion of the original incident" (See 3.3[k] of Appendix 2 of the Standard Test Match Playing Conditions, ICC Playing Handbook 2012-13).
This is the central faultline in the understanding of the DRS. To some technophiles, it promises an end to interpretation; that, with the DRS, there is to be no more "in the opinion of the umpire". Technology will show everything clearly - make every decision self-evident.
Not so. Under the DRS, a judgement has to be made about whether or not evidence is conclusive. A judgement also has to be made about whether all the evidence (often conflicting, due to the limitations of the technologies involved), taken together, merits a reversal. There have been instances where outside edges have been ruled to have occurred, though there was no heat signature on the bat.
The ICC has consistently insisted that the idea is not to render umpires obsolete. It is right, but in a convoluted way. What the DRS does is allow umpires a limited, strictly defined second look at an event. But it does so on the players' terms. Umpires are currently not allowed to review a decision after it has been made on the field. The "umpire review" element of the DRS takes place before the decision is made on the field in the first instance. Simon Taufel, who has wide experience of both DRS and non-DRS international matches, has questioned whether this is reasonable.
So far, the DRS has been badly burnt in the ongoing Ashes, and has received criticism from some unexpected quarters. Add to this a recent report that a few boards other than India's also oppose it. I suspect that the DRS will not survive in its present form for long.
The ICC is experimenting with real-time replays, which it says will allow TV umpires to initiate reviews. The ICC has long claimed that this is currently not done because it will waste time. The ICC's statistics suggest that in an average DRS Test match, 49 umpiring decisions are made (a decision is said to be made when an appeal from the fielding side is answered). Let's say an average Test lasts 12 sessions. This suggests that on average about four appeals are made per session of Test cricket when the DRS is employed. These numbers don't suggest that allowing umpires to initiate reviews will result in too much extra wasted time, do they? It should be kept in mind, though, that the ICC assesses time wasted relative to the progress of the game, and not simply as a measure in seconds or minutes.
The most damaging consequence of the DRS is off the field. It has now become a point of debate among professional observers of cricket about whether dismissals are determined by the umpire. The idea that the umpire is an expert whose role it is to exercise judgement, and whose judgement is to be respected, is now only superficially true. Time and again, eminently reasonable lbw decisions are reversed for fractions, and as a result are considered clear mistakes. Cricket has lost the ability to appreciate the close decision, the marginal event. It has lost the essential sporting capacity to concede that an event on the field is so close that perhaps a decision in favour of the opposition is reasonable.

On Cricket - Hawk-Eye is cockeyed, says Bishan Singh Bedi

Former Indian captain Bishan Singh Bedi, one of the finest left-arm spinners the world has seen, shared his views on contentious issues surrounding the game in an exclusive chat with TOI 26 July 2013. Excerpts...

The first two Ashes Tests have put a big question mark over the reliability of the Decision Review System. Are you for doing away with DRS?

Look, the whole idea behind allowing players to review umpiring decisions was to eliminate human errors with the help of technology. Nothing is wrong with that. The problem lies with the technology itself. I have never been a big fan of the Hawk-Eye and now it seems the Hot Spot too has gone cold. I completely endorse Ian Chappell's view that DRS should be taken out of the players' hands and handed over to the on-field umpires, who should be able to get technology-based inputs from the third umpire.

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Also Read

Cricket and DRS - The Best is not the Enemy of the Good



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But, as you said, the technology is still not foolproof...

It is not. There are inherent flaws in Hawk-Eye that in my opinion makes it cockeyed. What I particularly don't like about this technology is its standard approach to deviations. All bowlers know that very often balls deviate - more or less - without any particular reason. It may also depend on whether the bowler is bowling into the wind or against it. So these decisions are best left to on-field umpires, for they are in the best position to adjudicate.

Do you agree with the basic premise for a decision review in case of LBW appeals - that the ball should have pitched in line with the stumps?

The key to an LBW decision, in my opinion, should be not where the ball pitches but whether it would go on to hit the stumps if the batsman's did not come in the way. Let me point out that Mike Gatting would have been declared not out (on an LBW appeal) had Shane Warne's much-hyped 'Ball of the (last) Century' struck him on his back foot instead of sneaking in between his legs to hit the stumps! After all, Warne's big leg-break had pitched way outside the batsman's leg stump!

So how does one factor in the deviation?

It is a tough one. That is why I maintain that umpires should be very skeptical while ruling in bowlers' favour on front-foot LBW appeals. Look, the depth of the crease is four feet, and assuming that an average six-foot batsman would cover another four feet while playing forward means the ball would strike the pad some 8-9 feet from the stumps. The challenge before an umpire is that he not only has to read the line correctly but also factor in the trajectory of the delivery and possible deviations before deciding whether the ball would have gone on to hit the stumps.

So you are not in favour of umpires giving LBW decisions when batsmen are playing well forward?

Umpires should be more than 100% sure before upholding such appeals. All batsmen are not six-footers, so the umpires have to use their discretion.

Isn't it a pity that during your playing days batsmen got away by simply padding up?

Not only me, all four of us (Prasanna, Venkataraghavan and Chandrasekhar included) too missed out on a bagful of wickets because of this. Each one of us would have ended up with at least 200 more victims had umpires in our era given batsmen out when struck on the front pad.

Don't you think that umpires are under too much pressure because of DRS?

The umpire's job is an unenviable one. It is up to the governing body to make life easier for them. The players are not making it easier by appealing for everything. Umpires are human and are bound to succumb to pressures.

Why blame the players for this? They are, after all, playing within the rules...

The history of the game tells us that new rules had to be introduced because players pushed the parameters too far. 'Bodyline' bowling was possible because there was no restriction on the number of fielders on the leg side at that time. Fast bowlers used bouncers, a legitimate weapon in their armoury, to intimidate batsmen rather than trying to get them out. Ball-tampering became an issue. Match referees had to be introduced to make sure that there was no hanky-panky at the toss and to curb sledging. 

There seems to be a dearth of umpiring talent in the world...

You know why the English umpires used to be the best in our time? It was because they were mostly first-class cricketers for whom umpiring was a logical career option.

Is that the reason why it is not fair to compare players from different eras?

Just look at the bare facts. Together the four of us played 231 Tests, picked up 853 wickets but only 12.5 per cent of them (107) were LBW dismissals. Of my 266 Test wickets, only 16 came from LBWs (Prasanna 189/25, Venkataraghavan 156/24, Chandrasekhar 242/42). Muralitharan alone has 150 LBW victims, Shane Warne 138, Kumble 156, Vettori 74, Harbhajan 68 and Swann 68.