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The Power of Sunspots: An Experimental Analysis

  • Dietmar Fehr

    (Social Science Research Center, Berlin (WZB))

  • Frank Heinemann

    ()

    (Technische Universität Berlin)

  • Aniol Llorente-Saguer

    (Max Planck Institute for Research on Collective Goods, Bonn)

We present an experiment in which extrinsic information (signals) may generate sunspot equilibria. The underlying coordination game has a unique symmetric non-sunspot equilibrium, which is also risk-dominant. Other equilibria can be ordered according to risk dominance. We introduce salient but extrinsic signals on which subjects may condition their actions. By varying the number of signals and the likelihood that different subjects receive the same signal, we measure how strong these signals affect behavior. Sunspot equilibria emerge naturally if there are salient public signals. Highly correlated private signals may also cause sunspot-driven behavior, even though this is no equilibrium. The higher the correlation of signals and the easier they can be aggregated, the more powerful they are in dragging behavior away from the risk-dominant to risk-dominated strategies. Sunspot-driven behavior may lead to welfare losses and exert negative externalities on agents, who do not receive extrinsic signals.

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File URL: http://www.coll.mpg.de/pdf_dat/2011_33online.pdf
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Paper provided by Max Planck Institute for Research on Collective Goods in its series Working Paper Series of the Max Planck Institute for Research on Collective Goods with number 2011_33.

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Date of creation: Dec 2011
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Handle: RePEc:mpg:wpaper:2011_33
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