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Joseph Stiglitz -- Wikipedia, the free encyclopedia
Stiglitz's most famous research was on screening, a technique used by one economic agent to extract otherwise private information from another. It was for this contribution to the theory of information asymmetry that he shared the Nobel Memorial Prize in Economics in 2001 "for laying the foundations for the theory of markets with asymmetric information" with George A. Akerlof and A. Michael Spence.

Before the advent of models of imperfect and asymmetric information, the traditional neoclassical economics literature had assumed that markets are efficient except for some limited and well defined market failures. More recent work by Stiglitz and others reversed that presumption, to assert that it is only under exceptional circumstances that markets are efficient. Stiglitz has shown (together with Bruce Greenwald) that "whenever markets are incomplete and/or information is imperfect (which are true in virtually all economies), even competitive market allocation is not constrained Pareto efficient". In other words, they addressed "the problem of determining when tax interventions are Pareto-improving. The approach indicates that such tax interventions almost always exist and that equilibria in situations of imperfect information are rarely constrained Pareto optima."

Thus Stiglitz used a more strict, mathematical research tradition, and confronted the orthodox culture.

And currently, he is weighty activist in his critique:

Joseph Stiglitz Says Standard Economics Is Wrong. Inequality and Unearned Income Kills the Economy -- Evonomics.com

by das monde on Tue Feb 14th, 2017 at 12:54:33 AM EST
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