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The current financial crisis has brought out a fatal flaw in the foundations of the economic theories that guided economic agents and regulators: the unwarranted claim to precision and robustness. In this article I try to diagnose this flaw and discuss possible remedies. I argue that actual agents are intrinsically less sophisticated than the models assume they are, and that the various proposals to sustain the models by appealing to "as-if rationality" all fail. I next consider behavioral economics as an alternative to the standard models, claiming that while they may allow for successful retrodiction, they do not hold out much promise for prediction. I also discuss the use of statistical models, arguing that they are subject to so many traps and pitfalls that only a handful of elite practitioners can be trusted to use them well. Finally, I offer some speculations to explain the persistence in the economic profession and elsewhere of these useless or harmful models.

The Steve Jobs vision about bloggers, they are people that must leave editors the job to inform, and of course consume that information.

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