Joint Contract under Inequity Aversion

Abstract

The standard contract theory adopts the traditional hypothesis of pure self-interest. However, a series of game experiments have proven that people are not any self-interest but also inequity averse. Then, how will the inequity aversion influence the optimal contract for multiple agents? This paper attempts to obtain new theoretical insights by incorporating inequity aversion into the standard frame of optimal contract design. The optimal contract under relatively weak inequity aversion is found to be the relative joint contract, by which payment to each independent agent increases with his own output and others’ and agents with higher output will be paid more, while what under strong, even very strong, inequity aversion is the egalitarian joint contract, by which payment to each independent agent is always equal and hence agents with lower output will not be paid less. Moreover, it is shown that the inequity aversion results in incen-tive efficiency losses as agents with inequity aversion will suffer disutility in face of unfair allocation. Consequently, the principal has to pay additional inequity rent and risk compensation for inequity aversion to the agents, which both are the incentive efficiency losses resulted from inequity aversion and have never been explored by the standard contract theory, besides information rent and risk compensation for asymmetric information, which both have been probed in the standard contract theory deeply. In this way, this paper designs the optimal contracts for multiple agents with more realistic assumptions and hence can explain real economic behaviors more properly.

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WEI, G. and QIN, Y. (2009) Joint Contract under Inequity Aversion. Journal of Service Science and Management, 2, 149-160. doi: 10.4236/jssm.2009.23018.

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1] C. F. Camerer and R. H. Thaler, “Ultimatums, dictators and manners,” Journal of Economic Perspective, Vol. 9, pp. 209-219, 1995.
[2] J. Berg, J. Dickhaut, and K. McCabe, “Trust, reciprocity and social history,” Games and Economic Behavior, Vol. 10, pp. 122-142, 1995.
[3] E. Fehr, G. Kirchsteiger, and A. Riedl, “Does fairness prevent marketing clearing,” Quarterly Journal of Economics, Vol. 11, pp. 437-460, 1993.
[4] E. Fehr and S. Gachter, “Cooperation and punishments in public goods experiments,” American Economic Review, Vol. 90, pp. 980-994, 2000.
[5] E. Fehr and A. Falk, “Psychological foundations of incen- tives,” European Economic Review, Vol. 46, pp. 687- 724, 2002.
[6] S. Gachter and E. Fehr, “Fairness in the labor market: A survey of experimental results,” University of Zurich, Working Paper, 2001.
[7] E. Fehr and K. M. Schmidt, “A theory of fairness, competition and cooperation,” Quarterly Journal of Economics, Vol. 114, pp. 817-868, 1999.
[8] G. E. Bolton and A. Ockenfels, “ERC: A theory of equity, reciprocity and competition,” American Economic Review, Vol. 90, pp. 166-193, 2000.
[9] M. Rabin, “Incorporating fairness into game theory and economics,” American Economic Review, Vol. 83, pp. 1281-1302, 1993.
[10] M. Dufwenberg and G. Kirchsteiger, “A theory of sequential reciprocity,” Games and Economic Behavior, Vol. 47, pp. 269-298, 2004.
[11] F. Englmaier, “A survey on moral hazard, contracts and social preferences,” University of Munich, Working Paper, 2005.
[12] A. Falk, E. Fehr, and U. Fischbacher, “Testing theories of fairness-intentions matter,” Games and Economic Behavior, Vol. 62, pp. 287-303, 2008.
[13] F. Englmaier and A. Wambach, “Contracts and inequity aversion,” University of Munich, Working Paper, 2002.
[14] F. Englmaier and A. Wambach, “Optimal incentive contracts under inequity aversion,” IZA Discussion Paper, 2005.
[15] W. S. Neilson and J. Stowe, “Piece-rate contract for other-regarding workers,” Economic Inquiry, Forthcoming, 2009.
[16] R. Dur and A. Glazer, “Optimal incentive contracts when workers envy their bosses,” Journal of Law, Economics, and Organization, Vol. 24, No. 1, pp. 120-137, 2008.
[17] R. Rob and P. Zemsky, “Social capital, corporate culture, and incentive intensity,” RAND Journal of Economics, Vol. 32, pp. 243-257, 2002.
[18] S. Huck, D. Kubler, and J. Weibull, “Social norms and economic incentives in firms,” IUI, Working Paper, 2003.
[19] D. Demougin and C. Fluet, “Output and wages with inequality averse agents,” Canadian Journal of Economics, Vol. 39, No. 2, pp. 399-413, 2006.
[20] B. Barting and F. V. Siemens, “The intensity of incen-tives in firms and markets: Moral hazard with envious agents,” University of Munich Discussion Paper, 2006.
[21] D. Demougin and C. Fluet, “Inequity aversion in tournament,” Humboldt University Berlin, Working Paper, 2003.
[22] C. Grund and D. Sliwka, “Envy and compassion in tournament,” Journal of Economics and Management Strategy, Vol. 14, pp. 187-207, 2005.
[23] P. Rey-Biel, “Inequity aversion and team incentives,” Scandinavian Journal of Economics, Vol. 110, No. 2, pp. 297-320, June 2008.
[24] B. Barting and F. V. Siemens, “Efficiency in team production with inequity aversion agents,” University of Munich, Working Paper, 2004.
[25] A. Mohnen, K. Pokorny, and D. Sliwka, “Transparency, inequity aversion, and the dynamics of peer pressure in teams: Theory and evidence,” Journal of Labor Economics, Vol. 26, No. 4, pp. 693-720, 2008.
[26] E. Kandel and E. P. Lazear, “Peer pressure and partner-ship,” Journal of Political Economy, Vol. 100, pp. 801 -817, 1992.
[27] J. M. Barron and K. P. Gjerde, “Peer pressure in an agency relationship,” Journal of Labor Economics, Vol. 15, pp. 234-254, 1997.
[28] D. Masclet, “Peer pressure in work teams: The effects of inequity aversion,” University of Lyon Working Paper, 2002.
[29] H. Itoh, “Moral hazard and other-regarding preferences,” Japanese Economic Review, Vol. 55, pp. 18-45, 2004.
[30] E. Fehr and K. M. Schmidt, “Theories of fairness and reciprocity: Evidence and economic applications,” Ad-vances in Economics and Econometrics 8th World Con-gress, pp. 208-257, 2003.
[31] A. Falk and U. Fischbacher, “A theory of reciprocity,” Games and Economic Behavior, Vol. 54, pp. 293-315, 2006.
[32] J. C. Cox, D. Friedman, and G. Steven, “A tractable model of reciprocity and fairness,” Games and Economic Behavior, Vol. 59, No. 1, pp. 17-45, 2007.
[33] B. Holmstrom, “Moral hazard and observability,” Bell Journal of Economics, Vol. 10, pp. 74-91, 1979.
[34] B. Holmstrom, “Moral hazard in teams,” Bell Journal of Economics, Vol. 13, pp. 324-340, 1982.
[35] E. P. Lazear and S. Rosen, “Rank-order tournament as optimum labor contracts,” Journal of Political Economy, Vol. 89, pp. 841-864, 1981.
[36] J. Yun, “On the efficiency of the rank-order contract un-der moral hazard and adverse selection,” Journal of Labor Economics, Vol. 15, pp. 466-494, 1997.

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