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Strategic substitutabilities versus strategic complementarities: Towards a general theory of expectational coordination?

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Roger Guesnerie

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Abstract

This paper contrasts the views of expectational coordination in a stylised economic model under two polar assumptions: Strategic Complementarities (StCo) dominate or on the contrary are dominated by Strategic Substitutabilities (StSu). Although in the StCo case, "uniqueness" often "buys" "eductive stability", the two issues are strikingly different in the second case. Furthermore if, in the first case, incomplete information often improves "expectational coordination", it may have the converse effect in the StSu case. It is finally argued that, in macroeconomic contexts, StSu often unambiguously dominate StCo, even in a large class of models with Keynesian features, and even in an aggregate framework that magnifies the StCo effects. The "remains" of StCo in general cases are discussed.

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Paper provided by PSE (Ecole normale supérieure) in its series PSE Working Papers with number 2005-07.

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Date of creation: 2005
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Handle: RePEc:pse:psecon:2005-07

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  1. Milgrom, Paul & Roberts, John, 1990. "Rationalizability, Learning, and Equilibrium in Games with Strategic Complementarities," Econometrica, Econometric Society, vol. 58(6), pages 1255-77, November. [Downloadable!] (restricted)
  2. Gabriel Desgranges & Pierre-Yves Geoffard & Roger Guesnerie, 2003. "Do Prices Transmit Rationally Expected Information?," Journal of the European Economic Association, MIT Press, vol. 1(1), pages 124-153, 03. [Downloadable!] (restricted)
  3. Milgrom, Paul & Shannon, Chris, 1994. "Monotone Comparative Statics," Econometrica, Econometric Society, vol. 62(1), pages 157-80, January. [Downloadable!] (restricted)
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  4. Rochet, Jean Charles & Vives, Xavier, 2002. "Coordination Failures and the Lender of Last Resort: Was Bagehot Right After All?," CEPR Discussion Papers 3233, C.E.P.R. Discussion Papers. [Downloadable!] (restricted)
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  5. Morris, Stephen & Shin, Hyun Song, 1998. "Unique Equilibrium in a Model of Self-Fulfilling Currency Attacks," American Economic Review, American Economic Association, vol. 88(3), pages 587-97, June. [Downloadable!] (restricted)
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  6. repec:cup:macdyn:v:7:y:2003:i:1:p:63-88 is not listed on IDEAS
  7. Diamond, Peter A, 1982. "Aggregate Demand Management in Search Equilibrium," Journal of Political Economy, University of Chicago Press, vol. 90(5), pages 881-94, October. [Downloadable!] (restricted)
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  8. Gabriel Desgranges, 2000. "CK-Equilibria and Informational Efficiency in a Competitive Economy," Econometric Society World Congress 2000 Contributed Papers 1296, Econometric Society. [Downloadable!]
  9. Bernheim, B Douglas, 1984. "Rationalizable Strategic Behavior," Econometrica, Econometric Society, vol. 52(4), pages 1007-28, July. [Downloadable!] (restricted)
  10. Carlsson, Hans & van Damme, Eric, 1993. "Global Games and Equilibrium Selection," Econometrica, Econometric Society, vol. 61(5), pages 989-1018, September. [Downloadable!] (restricted)
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  11. Moulin, Herve, 1984. "Dominance solvability and cournot stability," Mathematical Social Sciences, Elsevier, vol. 7(1), pages 83-102, February. [Downloadable!] (restricted)
  12. R. Guesnerie, 2002. "Anchoring Economic Predictions in Common Knowledge," Econometrica, Econometric Society, vol. 70(2), pages 439-480, March. [Downloadable!] (restricted)
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  13. Roger Guesnerie, 2001. "Short-Run Expectational Coordination: Fixed Versus Flexible Wages," The Quarterly Journal of Economics, MIT Press, vol. 116(3), pages 1115-1147, August. [Downloadable!] (restricted)
  14. Heinemann, Frank, . "Rationalizable Expectations and Sunspot Equilibria in an Overlapping Generations Economy," IVS discussion paper series 506, Institut für Volkswirtschaft und Statistik (IVS), University of Mannheim.
  15. Borgers, Tilman, 1992. "Iterated Elimination of Dominated Strategies in a Bertrand-Edgeworth Model," Review of Economic Studies, Blackwell Publishing, vol. 59(1), pages 163-76, January. [Downloadable!] (restricted)
  16. Cooper, Russell & John, Andrew, 1988. "Coordinating Coordination Failures in Keynesian Models," The Quarterly Journal of Economics, MIT Press, vol. 103(3), pages 441-63, August. [Downloadable!] (restricted)
  17. Dekel, Eddie & Wolinsky, Asher, 2003. "Rationalizable outcomes of large private-value first-price discrete auctions," Games and Economic Behavior, Elsevier, vol. 43(2), pages 175-188, May. [Downloadable!] (restricted)
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  18. Guesnerie, Roger, 1992. "An Exploration of the Eductive Justifications of the Rational-Expectations Hypothesis," American Economic Review, American Economic Association, vol. 82(5), pages 1254-78, December. [Downloadable!] (restricted)
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  19. Christophe Chamley, 1999. "Coordinating Regime Switches," The Quarterly Journal of Economics, MIT Press, vol. 114(3), pages 869-905, August. [Downloadable!] (restricted)
  20. Evans George W. & Guesnerie Roger, 1993. "Rationalizability, Strong Rationality, and Expectational Stability," Games and Economic Behavior, Elsevier, vol. 5(4), pages 632-646, October. [Downloadable!] (restricted)
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  21. David Frankel & Ady Pauzner, 2000. "Resolving Indeterminacy In Dynamic Settings: The Role Of Shocks," The Quarterly Journal of Economics, MIT Press, vol. 115(1), pages 285-304, February. [Downloadable!] (restricted)
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