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Optimality of Entry Regulation under Incomplete Information

  • Kim, Jaehong
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    The lack of complete information of the government has been considered as a barrier to the optimal regulation, as it is well-known in price regulations literature. However, it is not true for the entry regulation: This paper shows that the performance of the entry regulation under incomplete information can be better than that under complete information. Under incomplete information, the incumbent firm would deviate from the monopoly behavior to signal itself as an efficient type and to trigger entry regulation which prevents excess entry in case that the incumbent is efficient. As a result, social welfare can be even higher than under complete information, since not only the optimal post-entry market structure is achieved as under complete information but the pre-entry price is even lower than that under complete information.

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    File URL: http://hermes-ir.lib.hit-u.ac.jp/rs/bitstream/10086/18779/1/HJeco0510200430.pdf
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    Article provided by Hitotsubashi University in its journal Hitotsubashi Journal of Economics.

    Volume (Year): 51 (2010)
    Issue (Month): 2 (December)
    Pages: 43-58

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    Handle: RePEc:hit:hitjec:v:51:y:2010:i:2:p:43-58
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    1. Cho, In-Koo & Kreps, David M, 1987. "Signaling Games and Stable Equilibria," The Quarterly Journal of Economics, MIT Press, vol. 102(2), pages 179-221, May.
    2. Laffont, Jean-Jacques & Tirole, Jean, 1986. "Using Cost Observation to Regulate Firms," Journal of Political Economy, University of Chicago Press, vol. 94(3), pages 614-41, June.
    3. Milgrom, Paul & Roberts, John, 1982. "Limit Pricing and Entry under Incomplete Information: An Equilibrium Analysis," Econometrica, Econometric Society, vol. 50(2), pages 443-59, March.
    4. N. Gregory Mankiw & Michael D. Whinston, 1986. "Free Entry and Social Inefficiency," RAND Journal of Economics, The RAND Corporation, vol. 17(1), pages 48-58, Spring.
    5. Laffont, Jean-Jacques, 1992. "The New Economics of Regulation Ten Years After," IDEI Working Papers 22, Institut d'Économie Industrielle (IDEI), Toulouse.
    6. Kim, Jaehong, 2003. "Limit Pricing Through Entry Regulation," Hitotsubashi Journal of Economics, Hitotsubashi University, vol. 44(1), pages 1-13, June.
    7. Spence, A Michael, 1973. "Job Market Signaling," The Quarterly Journal of Economics, MIT Press, vol. 87(3), pages 355-74, August.
    8. Schmidt, Klaus M, 1996. "The Costs and Benefits of Privatization: An Incomplete Contracts Approach," Journal of Law, Economics and Organization, Oxford University Press, vol. 12(1), pages 1-24, April.
    9. Rothschild, Michael & Stiglitz, Joseph E, 1976. "Equilibrium in Competitive Insurance Markets: An Essay on the Economics of Imperfect Information," The Quarterly Journal of Economics, MIT Press, vol. 90(4), pages 630-49, November.
    10. Suzumura, Kotaro & Kiyono, Kazuharu, 1987. "Entry Barriers and Economic Welfare," Review of Economic Studies, Wiley Blackwell, vol. 54(1), pages 157-67, January.
    11. Akerlof, George A, 1970. "The Market for 'Lemons': Quality Uncertainty and the Market Mechanism," The Quarterly Journal of Economics, MIT Press, vol. 84(3), pages 488-500, August.
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