Joseph Stiglitz

Joseph Stiglitz (born 1943) is an American economist and Nobel laureate who shared the 2001 prize with George Akerlof and Michael Spence for analyses of markets with asymmetric information. Where Akerlof examined adverse selection and Spence modeled signaling, Stiglitz developed the theory of screening: mechanisms by which uninformed parties can design contracts or institutions that force informed parties to reveal their private information.

Stiglitz's work extends beyond pure theory into development economics, public policy, and institutional design. He has argued that market failures are not exceptions but the norm in developing economies, where information asymmetries are more severe and institutional capacity to address them is weaker. His critique of the Washington Consensus — the neoliberal policy package imposed on developing nations — emphasized that market liberalization without attention to information infrastructure often produces worse outcomes than the status quo.

The broader methodological implication is that information economics is not a special case within neoclassical theory but a fundamental reframing. If asymmetric information is pervasive, then the standard competitive equilibrium is not merely unrealistic — it is the wrong baseline for policy analysis.