Asymmetric information in bilateral trade and in markets: An inversion result |
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Authors: | Stephan Lauermann |
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Institution: | University of Michigan, Department of Economics, 611 Tappan Street, Ann Arbor, MI 48109, United States |
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Abstract: | I consider bilateral trade between a seller and a buyer with private valuations. The seller makes a take-it-or-leave-it price offer. If the seller observes the buyer?s valuation (symmetric information), bilateral trade is trivially efficient. If the seller cannot observe the valuation (asymmetric information), bilateral trade is inefficient. This bilateral trading game is embedded into a large matching market. In the steady-state equilibrium of the market game, the relation between the informational regime and efficiency is inverted: With small frictions efficiency obtains if information is asymmetric. If information is symmetric, however, the trading outcome can be very inefficient—even if frictions vanish. |
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