Concurrence spatiale et distorsions de localisation en information incomplète
Abstract[eng] Spatial competition and distortuns of localization. Under incomplete information. . We study a model of spatial duopoly competition with sequential entry on a segment in the choice of locations (stage 1 of the game) and then simultaneous competition in delivery prices (stage 2). The second mover at stage one has incomplete information on the marginal cost (high or low) of the first mover. Hence, we obtain a signalling game in which there exist naturel constraints on the range of possible signais. The focus of the analysis is the identification and characterization of perfect Bayesian equilibria robust to some refinements criteria (the intuitive criterion and Dl) when the constraints on the signals are tight. The main result is that the separating equilibrium is no longer the only equilibrium surviving the Dl criterion. An important consequence of this resuit is that the robust equilibria become highly sensitive to the prior beliefs of the players. For a given interval of locations, the higher the cost difference between the low type and the high type of first movers, the more often the constraints will be tight. The characterization of the role of these constraints requires a systematic description of ail the equilibria and of their dependence on prior beliefs. [fre] Concurrence spatiale et distorsions de localisation en information incomplÃ¨te . . La thÃ©orie de la concurrence spatiale est essentiellement une thÃ©orie de la concurrence en information complÃ¨te. On se propose de procÃ©der Ã un premier examen des consÃ©quences d'asymÃ©tries d'information sur la localisation des firmes. On considÃ¨re un duopole dans lequel la concurrence se dÃ©roule en deux phases. Au cours d'une premiÃ¨re Ã©tape, une premiÃ¨re firme dont le coÃ»t n'est pas connu de la seconde mais qui connaÃ®t le 'coÃ»t de cette derniÃ¨re, choisit sa localisation sur un segment de droite. Cette localisation est observÃ©e par la seconde firme qui dÃ©termine ensuite sa propre localisation sur le
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Bibliographic InfoArticle provided by Presses de Sciences-Po in its journal Revue économique.
Volume (Year): n° 42 (1991)
Issue (Month): 6 ()
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Web page: http://www.cairn.info/revue-economique.htm
Other versions of this item:
- Marcel Boyer & Michel Moreaux & Jean-Jacques Laffont & Philippe Mahenc, 1991. "Concurrence spatiale et distorsions de localisation en information incomplète," Revue Économique, Programme National Persée, vol. 42(6), pages 1047-1088.
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