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Boundary and interior equilibria: what drives convergence in a ‘beauty contest’?

  • Andrea, Morone
  • Piergiuseppe, Morone

We present an experimental game in the p-beauty framework. Building on the definitions of boundary and interior equilibria, we distinguish between ‘speed of convergence towards the game-theoretic equilibrium’ and ‘deviations of the guesses from the game-theoretic equilibrium’. In contrast to earlier findings (Güth et al., 2002), we show, under a different game parameterisation, that (i) interior equilibria initially produce smaller deviation of the guesses from the game-theoretic equilibrium compared to boundary equilibria; (ii) interior and boundary equilibria do not differ in the timeframe needed for convergence; (iii) the speed of convergence is higher in the boundary equilibrium.

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File URL: https://mpra.ub.uni-muenchen.de/9584/1/MPRA_paper_9584.pdf
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Paper provided by University Library of Munich, Germany in its series MPRA Paper with number 9584.

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Date of creation: 2008
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Handle: RePEc:pra:mprapa:9584
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  1. Güth, Werner & Kocher, Martin G. & Sutter, Matthias, 2002. "Experimental 'beauty contests' with homogeneous and heterogeneous players and with interior and boundary equilibria," Munich Reprints in Economics 18165, University of Munich, Department of Economics.
  2. Andrea Morone & Piergiuseppe Morone, 2007. "Guessing Games and People Behaviours: What Can we Learn?," series 0015, Dipartimento di Scienze Economiche e Metodi Matematici - Università di Bari, revised Feb 2007.
  3. Albert Satorra & Antoni Bosch-Domenech & Jose Garcia-Montalvo & Rosemarie Nagel, 2002. "One, two, (three), infinity: Newspaper and lab beauty-contest experiments," Artefactual Field Experiments 00011, The Field Experiments Website.
  4. Weber, Roberto A., 2003. "'Learning' with no feedback in a competitive guessing game," Games and Economic Behavior, Elsevier, vol. 44(1), pages 134-144, July.
  5. Nagel, Rosemarie, 1995. "Unraveling in Guessing Games: An Experimental Study," American Economic Review, American Economic Association, vol. 85(5), pages 1313-26, December.
  6. Duffy, John & Nagel, Rosemarie, 1997. "On the Robustness of Behaviour in Experimental "Beauty Contest" Games," Economic Journal, Royal Economic Society, vol. 107(445), pages 1684-1700, November.
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