In this paper I identify an instance of multiplicity of equilibria, in search markets with production cost heterogeneity. I show that if firms may enter or exit the market, there may be multiple equilibria. I provide a monotonicity property, which is necessary and sufficient for uniqueness. Multiplicity vanishes as the search cost gets small. Multiple equilibria can be ranked by welfare.
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Paper provided by Portuguese Competition Authority in its series Working Papers with number
03.
Find related papers by JEL classification: D43 - Microeconomics - - Market Structure and Pricing - - - Oligopoly and Other Forms of Market Imperfection D83 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Search, Learning, and Information L13 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Oligopoly and Other Imperfect Markets