Incomplete markets and individual risks
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This paper studies the incomplete markets model with financial assets when the only missing markets are for individual risks. There are no aggregate risks in the economy. Assuming the individual risks are only privately observable, the only equilibria that are implementable by anonymous mechanisms are those in which prices do not vary across states of the world. Such equilibria always exist. Generically, they are locally unique and depend continuously on the parameters of the economy, just like complete-markets equilibria. Generically, there is also an infinite-dimensional manifold of equilibria in which prices do vary across states of the world. These equilibria are isomorphic to sunspot equilibria.
KeywordsEconomic Theory Individual Risk Market Model Financial Asset Incomplete Market
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- 1.Balasko, Y.: Foundations of the theory of general equilibrium. San Diego: Academic Press 1988Google Scholar
- 2.Balasko, Y., Cass, D.: The structure of financial equilibrium with exogenous yields: the case of incomplete markets. Econometrica57, 135–162 (1989)Google Scholar
- 3.Blume, L., Easley, D.: Implementation of Walrasian expectations equilibria. J. Econ. Theory51, 207–227 (1990)Google Scholar
- 4.Cass, D.: Sunspots and incomplete financial markets: the leading example. In: Feiwel, G. (ed.) Joan Robinson and modern economic theory. London: Macmillan 1987Google Scholar
- 5.Debreu, G.: Economies with a finite set of equilibria. Econometrica38, 387–392 (1970)Google Scholar
- 6.Dubey, P., Geanakoplos, J., Shubik, M.: The revelation of information of strategic market games: a critique of rational expectations equilibrium. J. Math. Econ.16, 105–137 (1987)Google Scholar
- 7.Feldman, M., Gilles, C.: An expository note on individual risk without aggregate uncertainty. J. Econ. Theory35, 26–32 (1985)Google Scholar
- 8.Geanakoplos, J., Mas-Colell, A.: Real indeterminacy with financial assets. J. Econ. Theory47, 22–38 (1989)Google Scholar
- 9.Hellwig, M.: On the aggregation of information in competitive markets. J. Econ. Theory22, 447–498 (1980)Google Scholar
- 10.Kyle, A.: Informed speculation with imperfect competition. Rev. Econ. Studies56, 317–356 (1989)Google Scholar