Social Effects in a Multi-Agent Investment Game. An Experimental Analysis
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- Luigi Mittone & Matteo Ploner, 2009. "Social Effects in a Multi-Agent Investment Game. An Experimental Analysis," CEEL Working Papers 0905, Cognitive and Experimental Economics Laboratory, Department of Economics, University of Trento, Italia.
References listed on IDEAS
- Hoffman Elizabeth & McCabe Kevin & Shachat Keith & Smith Vernon, 1994. "Preferences, Property Rights, and Anonymity in Bargaining Games," Games and Economic Behavior, Elsevier, vol. 7(3), pages 346-380, November.
- 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.
- 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.
- Jan Potters & Martin Sefton & Lise Vesterlund, 2007. "Leading-by-example and signaling in voluntary contribution games: an experimental study," Economic Theory, Springer;Society for the Advancement of Economic Theory (SAET), vol. 33(1), pages 169-182, October.
- Potters, Jan & Sefton, Martin & Vesterlund, Lise, 2005.
"After you--endogenous sequencing in voluntary contribution games,"
Journal of Public Economics, Elsevier, vol. 89(8), pages 1399-1419, August.
- Potters, J.J.M. & Sefton, M. & Vesterlund, L., 2003. "After You - Endogenous Sequencing in Voluntary Contribution Games," Other publications TiSEM d3db2c6d-6867-4e63-b538-4, Tilburg University, School of Economics and Management.
- Potters, J.J.M. & Sefton, M. & Vesterlund, L., 2005. "After you - endogenous sequencing in voluntary contribution games," Other publications TiSEM db491f52-df7b-43dd-ab2b-7, Tilburg University, School of Economics and Management.
- Potters, J.J.M. & Sefton, M. & Vesterlund, L., 2003. "After You - Endogenous Sequencing in Voluntary Contribution Games," Discussion Paper 2003-98, Tilburg University, Center for Economic Research.
- Ernst Fehr & Klaus M. Schmidt, 1999.
"A Theory of Fairness, Competition, and Cooperation,"
The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 114(3), pages 817-868.
- Fehr, Ernst & Schmidt, Klaus M., . "A theory of fairness, competition, and cooperation," Chapters in Economics,, University of Munich, Department of Economics.
- Ernst Fehr & Klaus M. Schmidt, "undated". "A Theory of Fairness, Competition and Cooperation," IEW - Working Papers 004, Institute for Empirical Research in Economics - University of Zurich.
- Fehr, Ernst & Schmidt, Klaus M., 1999. "A theory of fairness, competition, and cooperation," Munich Reprints in Economics 20650, University of Munich, Department of Economics.
- Fehr, Ernst & Schmidt, Klaus M., 1998. "A Theory of Fairness, Competition and Cooperation," CEPR Discussion Papers 1812, C.E.P.R. Discussion Papers.
- Adriaan R. Soetevent, 2006. "Empirics of the Identification of Social Interactions; An Evaluation of the Approaches and Their Results," Journal of Economic Surveys, Wiley Blackwell, vol. 20(2), pages 193-228, April.
- Jan Potters & Martin Sefton & Lise Vesterlund, 2007.
"Leading-by-example and signaling in voluntary contribution games: an experimental study,"
Economic Theory, Springer;Society for the Advancement of Economic Theory (SAET), vol. 33(1), pages 169-182, October.
- Potters, J.J.M. & Sefton, M. & Vesterlund, L., 2007. "Leading-by-example and signaling in voluntary contribution games : An experimental study," Other publications TiSEM 1ea4e6c8-3071-46d8-a29f-0, Tilburg University, School of Economics and Management.
- La Porta, Rafael, et al, 1997.
"Trust in Large Organizations,"
American Economic Review, American Economic Association, vol. 87(2), pages 333-338, May.
- Rafael La Porta & Florencio Lopez-de-Silane & Andrei Shleifer & Robert W. Vishny, 1996. "Trust in Large Organizations," NBER Working Papers 5864, National Bureau of Economic Research, Inc.
- La Porta, Rafael & Lopez-de-Silanes, Florencio & Shleifer, Andrei & Vishny, Robert W, 1997. "Trust in Large Organizations," Scholarly Articles 30726298, Harvard University Department of Economics.
- George A. Akerlof, 1982. "Labor Contracts as Partial Gift Exchange," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 97(4), pages 543-569.
- Harvey James, 2002. "The Trust Paradox: A Survey of Economic Inquiries Into the Nature of Trust and Trustworthiness," Microeconomics 0202001, University Library of Munich, Germany.
- Fehr, Ernst & Gachter, Simon, 1998. "Reciprocity and economics: The economic implications of Homo Reciprocans1," European Economic Review, Elsevier, vol. 42(3-5), pages 845-859, May.
- Axel Ockenfels & Gary E. Bolton, 2000. "ERC: A Theory of Equity, Reciprocity, and Competition," American Economic Review, American Economic Association, vol. 90(1), pages 166-193, March.
- Soetevent, Adriaan R., 2005. "Anonymity in giving in a natural context--a field experiment in 30 churches," Journal of Public Economics, Elsevier, vol. 89(11-12), pages 2301-2323, December.
- James Jr., Harvey S., 2002. "The trust paradox: a survey of economic inquiries into the nature of trust and trustworthiness," Journal of Economic Behavior & Organization, Elsevier, vol. 47(3), pages 291-307, March.
- Urs Fischbacher, 2007. "z-Tree: Zurich toolbox for ready-made economic experiments," Experimental Economics, Springer;Economic Science Association, vol. 10(2), pages 171-178, June.
- Charles F. Manski, 1993.
"Identification of Endogenous Social Effects: The Reflection Problem,"
The Review of Economic Studies, Review of Economic Studies Ltd, vol. 60(3), pages 531-542.
- Manski, Charles F., 1991. "Identification of Endogenous Social Effects: The Reflection Problem," SSRI Workshop Series 292712, University of Wisconsin-Madison, Social Systems Research Institute.
- Manski, C.F., 1991. "Identification of Endogenous Social Effects: the Reflection Problem," Working papers 9127, Wisconsin Madison - Social Systems.
- Moxnes, E. & van der Heijden, E.C.M., 2000. "The Effect of Leadership in a Public Bad Experiment," Discussion Paper 2000-102, Tilburg University, Center for Economic Research.
- Rege, Mari & Telle, Kjetil, 2004. "The impact of social approval and framing on cooperation in public good situations," Journal of Public Economics, Elsevier, vol. 88(7-8), pages 1625-1644, July.
- Edward L. Glaeser & Jose A. Scheinkman, 1999. "Measuring Social Interactions," Harvard Institute of Economic Research Working Papers 1878, Harvard - Institute of Economic Research.
- Fehr, Ernst & Kirchler, Erich & Weichbold, Andreas & Gächter, Simon, 1998. "When Social Norms Overpower Competition: Gift Exchange in Experimental Labor Markets," Journal of Labor Economics, University of Chicago Press, vol. 16(2), pages 324-351, April.
- Bardsley, Nicholas & Sausgruber, Rupert, 2005. "Conformity and reciprocity in public good provision," Journal of Economic Psychology, Elsevier, vol. 26(5), pages 664-681, October.
- Bohnet, Iris & Frey, Bruno S., 1999. "The sound of silence in prisoner's dilemma and dictator games," Journal of Economic Behavior & Organization, Elsevier, vol. 38(1), pages 43-57, January.
- Berg Joyce & Dickhaut John & McCabe Kevin, 1995. "Trust, Reciprocity, and Social History," Games and Economic Behavior, Elsevier, vol. 10(1), pages 122-142, July.
Citations
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Cited by:
- Simon Gächter & Daniele Nosenzo & Martin Sefton, 2012.
"The Impact of Social Comparisons on Reciprocity,"
Scandinavian Journal of Economics, Wiley Blackwell, vol. 114(4), pages 1346-1367, December.
- Gächter, Simon & Nosenzo, Daniele & Sefton, Martin, 2008. "The Impact of Social Comparisons on Reciprocity," IZA Discussion Papers 3639, Institute of Labor Economics (IZA).
- Simon Gaechter & Daniele Nosenzo & Martin Sefton, 2008. "The Impact of Social Comparisons on Reciprocity," Discussion Papers 2008-09, The Centre for Decision Research and Experimental Economics, School of Economics, University of Nottingham.
- Simon Gaechter & Daniele Nosenzo & Martin Sefton, 2010. "The Impact of Social Camparisons of Reciprocity," Discussion Papers 2010-10, The Centre for Decision Research and Experimental Economics, School of Economics, University of Nottingham.
- Simon Gächter & Daniele Nosenzo & Martin Sefton, 2012.
"The Impact of Social Comparisons on Reciprocity,"
Scandinavian Journal of Economics, Wiley Blackwell, vol. 114(4), pages 1346-1367, December.
- Gächter, Simon & Nosenzo, Daniele & Sefton, Martin, 2008. "The Impact of Social Comparisons on Reciprocity," IZA Discussion Papers 3639, Institute of Labor Economics (IZA).
- Simon Gaechter & Daniele Nosenzo & Martin Sefton, 2010. "The Impact Of Social Comparisons On Reciprocity," Discussion Papers 2010-10, The Centre for Decision Research and Experimental Economics, School of Economics, University of Nottingham.
- Simon Gaechter & Daniele Nosenzo & Martin Sefton, 2008. "The Impact of Social Comparisons on Reciprocity," Discussion Papers 2008-09, The Centre for Decision Research and Experimental Economics, School of Economics, University of Nottingham.
- Simon Gaechter & Daniele Nosenzo & Martin Sefton, 2010. "The Impact of Social Camparisons of Reciprocity," Discussion Papers 2010-10, The Centre for Decision Research and Experimental Economics, School of Economics, University of Nottingham.
- Simon Gaechter & Daniele Nosenzo & Martin Sefton, 2008. "The Impact of Social Comparisons on Reciprocity," Discussion Papers 2008-09, The Centre for Decision Research and Experimental Economics, School of Economics, University of Nottingham.
- M. Bigoni & S. Bortolotti & M. Casari & D. Gambetta, 2012. "Trustworthy by Convention," Working Papers wp827, Dipartimento Scienze Economiche, Universita' di Bologna.
- Gächter, Simon & Thöni, Christian, 2010.
"Social comparison and performance: Experimental evidence on the fair wage-effort hypothesis,"
Journal of Economic Behavior & Organization, Elsevier, vol. 76(3), pages 531-543, December.
- Christian Thöni & Simon Gächter, 2009. "Social Comparison and Performance: Experimental Evidence on the Fair Wage-Effort Hypothesis," University of St. Gallen Department of Economics working paper series 2009 2009-29, Department of Economics, University of St. Gallen.
- Gächter, Simon & Thöni, Christian, 2010. "Social Comparison and Performance: Experimental Evidence on the Fair Wage-Effort Hypothesis," IZA Discussion Papers 4687, Institute of Labor Economics (IZA).
- Simon Gaechter & Christian Thoeni, 2009. "Social Comparison and Performance: Experimental Evidence on the Fair Wage-Effort Hypothesis," Discussion Papers 2009-23, The Centre for Decision Research and Experimental Economics, School of Economics, University of Nottingham.
- Simon Gächter & Christian Thöni, 2010. "Social Comparison and Performance: Experimental Evidence on the Fair Wage-Effort Hypothesis," Post-Print hal-00911823, HAL.
- Jérémy Celse, 2009. "Will Joe the Plumber envy Bill Gates? The impact of both absolute and relative differences on interdependent preferences," Working Papers 09-26, LAMETA, Universtiy of Montpellier, revised Dec 2009.
- Bigoni, Maria & Bortolotti, Stefania & Casari, Marco & Gambetta, Diego, 2013. "It takes two to cheat: An experiment on derived trust," European Economic Review, Elsevier, vol. 64(C), pages 129-146.
- Gächter, Simon & Thöni, Christian, 2010.
"Social comparison and performance: Experimental evidence on the fair wage-effort hypothesis,"
Journal of Economic Behavior & Organization, Elsevier, vol. 76(3), pages 531-543, December.
- Christian Thöni & Simon Gächter, 2009. "Social Comparison and Performance: Experimental Evidence on the Fair Wage-Effort Hypothesis," University of St. Gallen Department of Economics working paper series 2009 2009-29, Department of Economics, University of St. Gallen.
- Simon Gaechter & Christian Thoeni, 2009. "Social Comparison and Performance: Experimental Evidence on the Fair Wage-Effort Hypothesis," Discussion Papers 2009-23, The Centre for Decision Research and Experimental Economics, School of Economics, University of Nottingham.
- Gächter, Simon & Thöni, Christian, 2010. "Social Comparison and Performance: Experimental Evidence on the Fair Wage-Effort Hypothesis," IZA Discussion Papers 4687, Institute of Labor Economics (IZA).
- Simon Gaechter & Christian Thoeni, 2009. "Social Comparison and Performance: Experimental Evidence on the Fair Wage-Effort Hypothesis," Discussion Papers 2009-23, The Centre for Decision Research and Experimental Economics, School of Economics, University of Nottingham.
- Simon Gächter & Christian Thöni, 2010. "Social Comparison and Performance: Experimental Evidence on the Fair Wage-Effort Hypothesis," Post-Print hal-00911823, HAL.
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NEP fields
This paper has been announced in the following NEP Reports:- NEP-CBE-2008-06-21 (Cognitive and Behavioural Economics)
- NEP-EXP-2008-06-21 (Experimental Economics)
- NEP-GTH-2008-06-21 (Game Theory)
- NEP-SOC-2008-06-21 (Social Norms and Social Capital)
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