It should be clear of course that for traders to have incentives to gather information required that information not be perfectly disseminated in the… - Joseph E. Stiglitz

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It should be clear of course that for traders to have incentives to gather information required that information not be perfectly disseminated in the market. If, simply by looking at market prices, those who do not spend money to acquire information can glean all the information that the informed traders who have spent money to acquire information have, then the informed traders will not have any informational advantage; they will not be able to obtain any return to their expenditures on information acquisition. Accordingly, if there were a complete set of markets, information would be so well conveyed that investors would have no incentives to gather information. (Of course with all participants having the same [zero] information, incentives to trade would be greatly reduced.) To put the matter differently, the assumptions of "informed" markets and "a complete set of markets" may be mutually exclusive.

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About Joseph E. Stiglitz

Joseph Eugene Stiglitz (born February 9, 1943) is an American economist and author. He is the winner of the John Bates Clark Medal in 1979 and the Nobel Memorial Prize in Economics in 2001, which he shared with George Akerlof and Michael Spence. Stiglitz previously served as Chief Economist of the World Bank between 1997 and 2000.

Also Known As

Birth Name: Joseph Eugene Stiglitz
Native Name: Joseph Stiglitz
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