Herbert Gintis and I have worked together since being asked by Martin Luther King Jr. to produce a series of background papers for the "Poor People's March" in 1968 (See my main research page). With Christina Fong we studied preferences for egalitarian redistribution. Melissa Groves joined Herb and me to edit Unequal Chances: Family Background and Economic Success and to write a paper on behavioral determinants of earnings.

Rajiv Sethi, Glenn Loury, and I are working on the problem of segregation and persistent group inequality.

Jung-Kyoo Choi and I work on the evolution of property rights and parochial altruism, with Astrid Hopfensitz we studied the coevolution of institutions and behaviors.

Willemien Kets and I work with Rajiv Sethi on the theory of networks, with applications to major transitions in human social structure.

Sung Ha Hwang and I work on the relationship between social preferences and conventional incentives especially mechanism design when preferences depend on incentives.

Suresh Naidu and I work on stochastic evolutionary game theoretic models of institutional innovation, persistence and transition.

Yongjin Park and I used a model of Veblen effects to study the relationship between inequality and work hours.

Arjun Jayadev are working on the role of guard labor in the U.S. and other economies.

Dori Posel and I study the effects of genetic relatedness on altruistic behavior in a sample of migrant workers in South Africa.

Ernst Fehr, Robert Boyd, Peter Richerson, Jeo Henrich, Herb Gintis, Colin Camerer and I with other collaborators do research on behavioral and evolutionary economic including cross cultural experiments, the evolution of altruistic punishment, and strong reciprocity.

Peter Hammerstein and I have collaborated on the intersection of economics and biology.

Eric A. Smith, Herb Gintis and I developed a costly signaling model of pro-social behaviors in small groups.

Ugo Pagano and I work on biology and economics, and on globalization and cultural standardization.

Pranab Bardhan and I headed the MacArthur Foundation research network on the effects of inequality on economic performance (1995-2007). With the late Michael Wallerstein we co-edited Globalization and Egalitarian Redistribution, and with Jean-Marie Baland, Inequality, Cooperation, and Environmental Sustainability.

Karla Hoff and Steven Durlauf are my co-editors of Poverty Traps.

Frank Roosevelt, Richard Edwards and I wrote Understanding Capitalism: Competition, Command and Change, Third Edition (Oxford, 2005).