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Measuring Indirect Reciprocity: Whose Back Do We Scratch?

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  • Luca Stanca

Abstract

This paper presents an experimental investigation of strong indirect reciprocity. We examine both generalized indirect reciprocity (if A helps B then B helps C) and social indirect reciprocity (if A helps B then C helps A), in a setting where reciprocal behavior cannot be explained by strategic motivations. We also consider a treatment for direct reciprocity, as a benchmark, and use a variant of the strategy method to control for di®erences in ¯rst movers' actions across treatments. We ¯nd evidence of strong reciprocity within each treatment, both for strategies and decisions. Generalized indirect reciprocity is found to be signi¯cantly stronger than social indirect reciprocity and, interestingly, direct reciprocity. This ¯nd- ing is interpreted as re°ecting the relevance of ¯rst movers' motivation for second movers' reciprocal behavior.

Suggested Citation

  • Luca Stanca, 2007. "Measuring Indirect Reciprocity: Whose Back Do We Scratch?," Working Papers 131, University of Milano-Bicocca, Department of Economics, revised Nov 2007.
    • Handle: RePEc:mib:wpaper:131
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    JEL classification:

    • C78 - Mathematical and Quantitative Methods - - Game Theory and Bargaining Theory - - - Bargaining Theory; Matching Theory
    • C91 - Mathematical and Quantitative Methods - - Design of Experiments - - - Laboratory, Individual Behavior
    • C92 - Mathematical and Quantitative Methods - - Design of Experiments - - - Laboratory, Group Behavior

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