Evolutionary arguments are often used to justify the fundamental behavioral postulates of competive equilibrium. Economists such as Milton Friedman have argued that natural selection favors profit maximizing firms over firms engaging in other behaviors. Consequently, producer efficiency, and therefore Pareto efficiency, are justified on evolutionary grounds. We examine these claims in an evolutionary general equilibrium model. If the economic environment were held constant, profitable firms would grow and unprofitable firms would shrink. In the general equilibrium model, prices change as factor demands and output supply evolves. Without capital markets, when firms can grow only through retained earnings, our model verifies Friedman's claim that natural selection favors profit maximization. But we show through examples that this does not imply that equilibrium allocations converge over time to efficient allocations. Consequently, Koopmans critique of Friedman is correct. When capital markets are added, and firms grow by attracting investment, Friedman's claim may fail. In either model the long-run outcomes of evolutionary market models are not well described by conventional General Equilibrium analysis with profit maximizing firms.
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Length: 33 pages Date of creation: 25 Dec 1997 Date of revision:
09 Jul 1998 Handle: RePEc:wpa:wuwpge:9712003
Note: Type of Document - Acrobat; prepared with pdftex; pages: 33; figures: in a separate acrobat file. Contact details of provider: Web page: http://129.3.20.41
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Find related papers by JEL classification: D5 - Microeconomics - - General Equilibrium and Disequilibrium D6 - Microeconomics - - Welfare Economics D9 - Microeconomics - - Intertemporal Choice and Growth
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Burkhard C. Schipper, 2005.
"Imitators and Optimizers in Cournot Oligopoly,"
Discussion Papers
53, SFB/TR 15 Governance and the Efficiency of Economic Systems, Free University of Berlin, Humboldt University of Berlin, University of Bonn, University of Mannheim, University of Munich.
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