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Competitive Pooling: Rothschild-Stiglitz Reconsidered

Pradeep Dubey and John Geanakoplos

The Quarterly Journal of Economics, 2002, vol. 117, issue 4, 1529-1570

Abstract: We build a model of competitive pooling, which incorporates adverse selection and signaling into general equilibrium. Pools are characterized by their quantity limits on contributions. Households signal their reliability by choosing which pool to join. In equilibrium, pools with lower quantity limits sell for a higher price, even though each household's deliveries are the same at all pools. The Rothschild-Stiglitz model of insurance is included as a special case. We show that by recasting their hybrid oligopolistic-competitive story in our perfectly competitive framework, their separating equilibrium always exists (even when they say it does not) and is unique.

Date: 2002
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Working Paper: Competitive Pooling: Rothschild-Stiglitz Reconsidered (2002) Downloads
Working Paper: Competitive Pooling: Rothschild-Stiglitz Reconsidered (2001) Downloads
Working Paper: Competitive Pooling: Rothschild-Stiglitz Reconsidered (2001) Downloads
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The Quarterly Journal of Economics is currently edited by Robert J. Barro, Lawrence F. Katz, Nathan Nunn, Andrei Shleifer and Stefanie Stantcheva

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