David Levine’s essay is all grown up and now a full-blown book.  His goal is to “set the record straight” and document the true successes and failures of economic theory.  Here is a choice passage:

One of the most frustrating experiences for a working economist is to be confronted by a psychologist, political scientist – or even in some cases Nobel Prize winning economist – to be told in no uncertain terms “Your theory does not explain X – but X happens in the real world, so your theory is wrong.” The frustration revolves around the fact that the theory does predict X and you personally published a paper in a major journal showing exactly that. One cannot intelligently criticize – no matter what one’s credentials – what one does not understand. We have just seen that standard mainstream economic theory explains a lot of things quite well. Before examining criticisms of the theory more closely it would be wise to invest a little time in understanding what the theory does and does not say.

The point is that the theory of “rational play” does not say what you probably think it says. At first glance, it is common to call the behavior of suicide bombers crazy or irrational – as for example in the Sharkansky quotation at the beginning of the chapter. But according to economics it is probably not. From an economic perspective suicide need not be irrational: indeed a famous unpublished 2004 paper by Nobel Prize winning economist Gary Becker and U.S. Appeals Court Judge Richard Posner called “Suicide: An Economic Approach” studies exactly when it would be rational to commit suicide.

The evidence about the rationality of suicide is persuasive. For example, in the State of Oregon, suicide is legal. It cannot, however, be legally done in an impulsive fashion: it requires two oral requests separated by at least 15 days plus a written request signed in the presence of two witnesses, at least one of whom is not related to the applicant. While the exact number of people committing suicide under these terms is not known, it is substantial. Hence – from an economic perspective – this behavior is rational because it represents a clearly expressed preference.

What does this have to do with suicide bombers? If it is rational to commit suicide, then it is surely rational to achieve a worthwhile goal in the process. Eliminating ones enemies is – from the perspective of economics – a rational goal. Moreover, modern research into suicide bombers (see Kix [2010]) shows that they exhibit exactly the same characteristics of isolation and depression that leads in many cases to suicide without bombing. That is: leaning to committing suicide they rationally choose to take their enemies with them.

The book is published as an e-Book by the Open Book Publishers. You can download a PDF for a nominal fee or even read it for free on the website.  Here’s more from David, writing about Kahnemann’s Thinking Fast and Slow.

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