The rapid collapse of socialism has raised new economic policy questions and revived old theoretical issues. In this book, Joseph Stiglitz explains how the neoclassical, or Walrasian model (the formal articulation of Adam Smith's invisible hand), which has dominated economic thought over the past half century, may have wrongly encouraged the belief that market socialism could work. Stiglitz proposes an alternative model, based on the economics of information, that provides greater theoretical insight into the workings of a market economy and clearer guidance for the setting of policy in transitional economies. Stiglitz sees the critical failing in the standard neoclassical model underlying market socialism to be