The standard neoclassical model the formal articulation of Adam Smith's invisible hand, the contention that market economies will ensure economic eff… - Joseph E. Stiglitz

Economists often like startling theorems, results which seem to run counter to conventional wisdom.

But while Keynes as well as the subsequent research in new Keynesian economics has provided an explanation for both unemployment and economic volatility while it has attempted to identify precisely what is wrong with the Arrow-Debreu model that can account for these observations there was another message of Keynes that was clearly heard: The macroeconomic ills of capitalism were curable. One didn't need to institute fundamental reforms in the economic system. One only needed selective government intervention. It is in this sense that Keynesian economics greatly weakened the case for market socialism.

Growing up in Gary Indiana gave me, I think, a distinct advantage over many of my classmates who had grown up in affluent suburbs. They could read articles that argued that in competitive equilibrium, there could not be discrimination, so long as there are some non-discriminatory individuals or firms, since it would pay any such firm to hire the lower wage discriminated-against individuals, and take them seriously. I knew that discrimination existed, even though there were many individuals who were not prejudiced. To me, the theorem simply proved that one or more of the assumptions that went into the theory was wrong.