Econometrica

Journal Of The Econometric Society

An International Society for the Advancement of Economic
Theory in its Relation to Statistics and Mathematics

Edited by: Guido W. Imbens • Print ISSN: 0012-9682 • Online ISSN: 1468-0262

Econometrica: Jul, 1962, Volume 30, Issue 3

Equilibrium in a Reinsurance Market

https://doi.org/0012-9682(196207)30:3<424:EIARM>2.0.CO;2-F
p. 424-444

Karl Borch

This paper investigates the possibility of generalizing the classical theory of commodity markets to include uncertainty. It is shown that if uncertainty is considered as a commodity, it is possible to define a meaningful price concept, and to determine a price which makes supply equal to demand. However, if each participant seeks to maximize his utility, taking this price as given, the market will not in general reach a Pareto optimal state. If the market shall reach a Pareto optimal state, there must be negotiations between the participants, and it seems that the problem can best be analysed as an n-person cooperative game. The paper is written in the terminology of reinsurance markets. The theoretical model studied should be applicable also to stock exchanges and other markets where the participants seek to reach an optimal distribution of risk.


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