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Articles 1 - 11 of 11
Full-Text Articles in Social and Behavioral Sciences
Competitive Pooling: Rothschild-Stiglitz Reconsidered, Pradeep Dubey, John Geanakoplos
Competitive Pooling: Rothschild-Stiglitz Reconsidered, Pradeep Dubey, John Geanakoplos
Cowles Foundation Discussion Papers
We build a model of competitive pooling, which incorporates adverse selection and signalling 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 into our perfectly competitive framework, their separating equilibrium always exists (even when they say it doesn’t) and is unique.
Competitive Pooling: Rothschild-Stiglitz Reconsidered, Pradeep Dubey, John Geanakoplos
Competitive Pooling: Rothschild-Stiglitz Reconsidered, Pradeep Dubey, John Geanakoplos
Cowles Foundation Discussion Papers
We build a model of competitive pooling, which incorporates adverse selection and signalling 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 into our perfectly competitive framework, their separating equilibrium always exists (even when they say it doesn’t) and is unique.
Competitive Pooling: Rothschild-Stiglitz Reconsidered, Pradeep Dubey, John Geanakoplos
Competitive Pooling: Rothschild-Stiglitz Reconsidered, Pradeep Dubey, John Geanakoplos
Cowles Foundation Discussion Papers
We build a model of competitive pooling, which incorporates adverse selection and signalling 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 doesn’t) and is unique.
Insurance Contracts Designed By Competitive Pooling, Pradeep Dubey, John Geanakoplos
Insurance Contracts Designed By Competitive Pooling, Pradeep Dubey, John Geanakoplos
Cowles Foundation Discussion Papers
We build a model of competitive pooling and show how insurance contracts emerge in equilibrium, designed by the invisible hand of perfect competition. When pools are exclusive, we obtain a unique separating equilibrium. When pools are not exclusive but seniority is recognized, we obtain a different unique equilibrium: the pivotal primary-secondary equilibrium. Here reliable and unreliable households take out a common primary insurance up to its maximum limit, and then unreliable households take out further secondary insurance.
Default And Punishment In General Equilibrium, Pradeep Dubey, John Geanakoplos, Martin Shubik
Default And Punishment In General Equilibrium, Pradeep Dubey, John Geanakoplos, Martin Shubik
Cowles Foundation Discussion Papers
We extend the standard model of general equilibrium with incomplete markets to allow for default and punishment. The equilibrating variables include expected delivery rates, along with the usual prices of assets and commodities. By reinterpreting the variables, our model encompasses a broad range of moral hazard, adverse selection, and signalling phenomena (including the Akerlof lemons model and Rothschild-Stiglitz insurance model) in a general equilibrium framework. We impose a condition on the expected delivery rates for untraded assets that is similar to the trembling hand refinements used in game theory. Despite earlier claims about the nonexistence of equilibrium with adverse selection, …
Default And Punishment In General Equilibrium, Pradeep Dubey, John Geanakoplos, Martin Shubik
Default And Punishment In General Equilibrium, Pradeep Dubey, John Geanakoplos, Martin Shubik
Cowles Foundation Discussion Papers
We extend the standard model of general equilibrium with incomplete markets to allow for default and punishment by thinking of assets as pools. The equilibrating variables include expected delivery rates, along with the usual prices of assets and commodities. By reinterpreting the variables, our model encompasses a broad range of adverse selection and signalling phenomena in a perfectly competitive, general equilibrium framework. Perfect competition eliminates the need for lenders to compute how the size of their loan or the price they quote might affect default rates. It also makes for a simple equilibrium refinement, which we propose in order to …
Default And Punishment In General Equilibrium, Pradeep Dubey, John Geanakoplos, Martin Shubik
Default And Punishment In General Equilibrium, Pradeep Dubey, John Geanakoplos, Martin Shubik
Cowles Foundation Discussion Papers
We extend the standard model of general equilibrium with incomplete markets to allow for default and punishment by thinking of assets as pools. The equilibrating variables include expected delivery rates, along with the usual prices of assets and commodities. By reinterpreting the variables, our model encompasses a broad range of adverse selection and signalling phenomena in a perfectly competitive, general equilibrium framework. Perfect competition eliminates the need for lenders to compute how the size of their loan or the price they quote might affect default rates. It also makes for a simple equilibrium refinement, which we propose in order to …
Signalling And Default: Rothschild-Stiglitz Reconsidered, Pradeep Dubey, John Geanakoplos
Signalling And Default: Rothschild-Stiglitz Reconsidered, Pradeep Dubey, John Geanakoplos
Cowles Foundation Discussion Papers
In our previous paper we built a general equilibrium model of default and punishment in which equilibrium always exists and endogenously determines asset promises, penalties, and sales constraints. In this paper we interpret the endogenous sales constraints as equilibrium signals. By specializing the default penalties and imposing an exclusivity constraint on asset sales, we obtain a perfectly competitive version of the Rothschild-Stiglitz model of insurance. In our model their separating equilibrium always exists even when they say it doesn’t.
Default And Punishment In General Equilibrium, Pradeep Dubey, John Geanakoplos, Martin Shubik
Default And Punishment In General Equilibrium, Pradeep Dubey, John Geanakoplos, Martin Shubik
Cowles Foundation Discussion Papers
We extend the standard model of general equilibrium with incomplete markets to allow for default and punishment. The equilibrating variables include expected delivery rates, along with the usual prices of assets and commodities. By reinterpreting the variables, our model encompasses a broad range of adverse selection, and signalling phenomena (including the Akerlof lemons model and Rothschild-Stiglitz insurance model) and some moral hazard problems in a general equilibrium framework. Despite earlier claims about the nonexistence of equilibrium with adverse selection, we show that equilibrium always exists. We show that more lenient punishment which encourages default may be Pareto improving because it …
Default And Punishment In General Equilibrium, Pradeep Dubey, John Geanakoplos, Martin Shubik
Default And Punishment In General Equilibrium, Pradeep Dubey, John Geanakoplos, Martin Shubik
Cowles Foundation Discussion Papers
We extend the standard model of general equilibrium with incomplete markets to allow for default and punishment. The equilibrating variables include expected delivery rates, along with the usual prices of assets and commodities. By reinterpreting the variables, our model encompasses a broad range of adverse selection and signalling phenomena (including the Akerlof lemons model and the Rothschild-Stiglitz insurance model) in a general equilibrium framework. Despite earlier claims about the nonexistence of equilibrium with adverse selection, we show that equilibrium always exists. We show that more lenient punishment which encourages default may be Pareto improving because it increases the dimension of …
Default And Punishment In General Equilibrium, Pradeep Dubey, John Geanakoplos, Martin Shubik
Default And Punishment In General Equilibrium, Pradeep Dubey, John Geanakoplos, Martin Shubik
Cowles Foundation Discussion Papers
We extend the standard model of general equilibrium with incomplete markets to allow for default and punishment by thinking of assets as pools. The equilibrating variables include expected delivery rates, along with the usual prices of assets and commodities. By reinterpreting the variables, our model encompasses a broad range of adverse selection and signalling phenomena (including the Rothschild-Stiglitz insurance model) in a general equilibrium framework. In contrast to game-theoretic models of adverse selection, our perfectly competitive framework eliminates the need for lenders to compute how the size of their loan or the price they quote might affect default rates. The …