1. Kreps, David M. & Milgrom, Paul & Roberts, John & Wilson, Robert, 1982. "Rational cooperation in the finitely repeated prisoners' dilemma," Journal of Economic Theory, Elsevier, vol. 27(2), pages 245-252, August. [Downloadable!] (restricted)
2. Andreoni, James, 1988. "Why free ride? : Strategies and learning in public goods experiments," Journal of Public Economics, Elsevier, vol. 37(3), pages 291-304, December. [Downloadable!] (restricted)
3. Dufwenberg, M. & Kirchsteiger, G., 1998. "A theory of sequential reciprocity," Discussion Paper 37, Tilburg University, Center for Economic Research. [Downloadable!]
   Other versions:
   • Margin Dufwenberg & Georg Kirchsteiger, 2001. "A Theory of Sequential Reciprocity," Levine's Working Paper Archive 563824000000000090, David K. Levine. [Downloadable!]
   • Dufwenberg, Martin & Kirchsteiger, Georg, 2004. "A theory of sequential reciprocity," Games and Economic Behavior, Elsevier, vol. 47(2), pages 268-298, May. [Downloadable!] (restricted)
4. Guth, Werner & Schmittberger, Rolf & Schwarze, Bernd, 1982. "An experimental analysis of ultimatum bargaining," Journal of Economic Behavior & Organization, Elsevier, vol. 3(4), pages 367-388, December. [Downloadable!] (restricted)
5. Brandts, Jordi & Schram, Arthur, 2001. "Cooperation and noise in public goods experiments: applying the contribution function approach," Journal of Public Economics, Elsevier, vol. 79(2), pages 399-427, February. [Downloadable!] (restricted)
6. Dirk Engelmann & Urs Fischbacher, 2003. "Indirect Reciprocity and Strategic Reputation Building in an Experimental Helping Game," CERGE-EI Working Papers wp215, The Center for Economic Research and Graduate Education - Economic Institute, Prague. [Downloadable!]
   Other versions:
   • Dirk Engelmann & Urs Fischbacher, . "Indirect Reciprocity and Strategic Reputation Building in an Experimental Helping Game," IEW - Working Papers iewwp132, Institute for Empirical Research in Economics - IEW. [Downloadable!]
   • Dirk Engelmann & Urs Fischbacher, 2008. "Indirect Reciprocity and Strategic Reputation Building in an Experimental Helping Game," TWI Research Paper Series 34, Thurgauer Wirtschaftsinstitut, Universität Konstanz. [Downloadable!]
7. Fehr, Ernst & Kirchsteiger, Georg & Riedl, Arno, 1998. "Gift exchange and reciprocity in competitive experimental markets," European Economic Review, Elsevier, vol. 42(1), pages 1-34, January. [Downloadable!] (restricted)
   Other versions:
   • Ernst Fehr & Georg Kirchsteiger & Arno Riedl, 2003. "Gift Exchange and Reciprocity in Competitive Experimental Markets," Labor and Demography 0305002, EconWPA. [Downloadable!]
   • Fehr, Ernst & Kirchsteiger, Georg & Riedl, Arno, 1995. "Gift Exchange and Reciprocity in Competitive Experimental Markets," Economics Series 14, Institute for Advanced Studies. [Downloadable!]
8. Fehr, Ernst & Kirchsteiger, George & Riedl, Arno, 1993. "Does Fairness Prevent Market Clearing? An Experimental Investigation," The Quarterly Journal of Economics, MIT Press, vol. 108(2), pages 437-59, May. [Downloadable!] (restricted)
9. Ernst Fehr & Klaus M. Schmidt, 1999. "A Theory Of Fairness, Competition, And Cooperation," The Quarterly Journal of Economics, MIT Press, vol. 114(3), pages 817-868, August. [Downloadable!] (restricted)
   Other versions:
   • Ernst Fehr & Klaus M. Schmidt, . "A Theory of Fairness, Competition and Cooperation," IEW - Working Papers iewwp004, Institute for Empirical Research in Economics - IEW. [Downloadable!]
   • Fehr, Ernst & Schmidt, Klaus M., 1998. "A Theory of Fairness, Competition and Cooperation," CEPR Discussion Papers 1812, C.E.P.R. Discussion Papers. [Downloadable!] (restricted)
10. Gneezy, Uri & Guth, Werner & Verboven, Frank, 2000. "Presents or investments? An experimental analysis," Journal of Economic Psychology, Elsevier, vol. 21(5), pages 481-493, October. [Downloadable!] (restricted)
    Other versions:
    • U. Gneezy & W. Güth & F. Verboven, . "Presents or Investment? An Experimental Analysis," Sonderforschungsbereich 373 1998-56, Humboldt Universitaet Berlin.
11. Cooper, R. & DeJong, D.W. & Ross, T.W., 1992. "Cooperation without Reputation: Experimental Evidence from Prisoner's Dilemma Games," Papers 36, Boston University - Industry Studies Programme.
    Other versions:
    • Russell Cooper & Douglas V. DeJong & Thomas W. Ross, 1992. "Cooperation without Reputation: Experimental Evidence from Prisoner's Dilemma Games," Papers 0036, Boston University - Industry Studies Programme.
    • Cooper, Russell & DeJong, Douglas V. & Forsythe, Robert & Ross, Thomas W., 1996. "Cooperation without Reputation: Experimental Evidence from Prisoner's Dilemma Games," Games and Economic Behavior, Elsevier, vol. 12(2), pages 187-218, February. [Downloadable!] (restricted)
12. Weimann, Joachim, 1994. "Individual behaviour in a free riding experiment," Journal of Public Economics, Elsevier, vol. 54(2), pages 185-200, June. [Downloadable!] (restricted)
13. W. Güth & M. Königstein & N. Marchand & K. Nehring, . "Trust and Reciprocity in the Investment Game with Indirect Reward," Sonderforschungsbereich 373 2000-110, Humboldt Universitaet Berlin.
    Other versions:
    • Werner Güth & Manfred Königstein & Nadège Marchand & Klaus Nehring, 2001. "Trust and Reciprocity in the Investment Game with Indirect Reward," Homo Oeconomicus, Institute of SocioEconomics, vol. 18, pages 241-262.
14. Keser, Claudia & van Winden, Frans, 2000. " Conditional Cooperation and Voluntary Contributions to Public Goods," Scandinavian Journal of Economics, Blackwell Publishing, vol. 102(1), pages 23-39, March. [Downloadable!] (restricted)
15. Simon Gaechter & Armin Falk, . "Reputation and Reciprocity: Consequences for the Labour Relation," IEW - Working Papers iewwp019, Institute for Empirical Research in Economics - IEW. [Downloadable!]
    Other versions:
    • Gachter, Simon & Falk, Armin, 2002. " Reputation and Reciprocity: Consequences for the Labour Relation," Scandinavian Journal of Economics, Blackwell Publishing, vol. 104(1), pages 1-26. [Downloadable!] (restricted)
16. Kahneman, Daniel & Knetsch, Jack L & Thaler, Richard H, 1986. "Fairness and the Assumptions of Economics," Journal of Business, University of Chicago Press, vol. 59(4), pages S285-300, October. [Downloadable!] (restricted)
17. Andreoni, James, 1990. "Impure Altruism and Donations to Public Goods: A Theory of Warm-Glow Giving?," Economic Journal, Royal Economic Society, vol. 100(401), pages 464-77, June. [Downloadable!] (restricted)
18. Andreoni, James A & Miller, John H, 1993. "Rational Cooperation in the Finitely Repeated Prisoner's Dilemma: Experimental Evidence," Economic Journal, Royal Economic Society, vol. 103(418), pages 570-85, May. [Downloadable!] (restricted)
19. Ingrid Seinen & Arthur Schram, 2001. "Social Status and Group Norms," Tinbergen Institute Discussion Papers 01-003/1, Tinbergen Institute. [Downloadable!]
20. Gary E. Bolton & Axel Ockenfels, 2000. "ERC: A Theory of Equity, Reciprocity, and Competition," American Economic Review, American Economic Association, vol. 90(1), pages 166-193, March. [Downloadable!] (restricted)
21. Rabin, Matthew, 1993. "Incorporating Fairness into Game Theory and Economics," American Economic Review, American Economic Association, vol. 83(5), pages 1281-1302, December. [Downloadable!] (restricted)
22. Berg Joyce & Dickhaut John & McCabe Kevin, 1995. "Trust, Reciprocity, and Social History," Games and Economic Behavior, Elsevier, vol. 10(1), pages 122-142, July. [Downloadable!] (restricted)
23. Harbaugh, William T, 1998. "The Prestige Motive for Making Charitable Transfers," American Economic Review, American Economic Association, vol. 88(2), pages 277-82, May. [Downloadable!] (restricted)
24. Croson, Rachel T. A., 1996. "Partners and strangers revisited," Economics Letters, Elsevier, vol. 53(1), pages 25-32, October. [Downloadable!] (restricted)

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1. Yiping Ma & Sebastian Gonçalves & Sylvain Mignot & Jean-Pierre Nadal & Mirta B. Gordon, 2009. "Cycles of cooperation and free-riding in social systems," Working Papers hal-00349642_v1, HAL. [Downloadable!]
2. Giuseppe Danese & Luigi Mittone, 2008. "Reciprocity, Exchange and Redistribution. An experimental investigation inspired by Karl Polanyi’s The Economy as Instituted Process," CEEL Working Papers 0803, Computable and Experimental Economics Laboratory, Department of Economics, University of Trento, Italia. [Downloadable!]
3. Werner Güth & M. Vittoria Levati & Matthias Sutter & Eline van der Heijden, 2006. "Leading by example with and without exclusion power in voluntary contribution experiments," Papers on Strategic Interaction 2006-35, Max Planck Institute of Economics, Strategic Interaction Group. [Downloadable!]
   Other versions:
   • Guth, Werner & Levati, M. Vittoria & Sutter, Matthias & van der Heijden, Eline, 2007. "Leading by example with and without exclusion power in voluntary contribution experiments," Journal of Public Economics, Elsevier, vol. 91(5-6), pages 1023-1042, June. [Downloadable!] (restricted)
4. Luca Stanca & Luigino Bruni & Marco Mantovani, 2009. "The Effect of Motivations on Social Indirect Reciprocity: an Experimental Analysis," Working Papers 169, University of Milano-Bicocca, Department of Economics, revised Aug 2009. [Downloadable!]