The Behavioral Logic of Collective Action: Partisans Cooperate and Punish More Than Non-Partisans (with Tim Johnson, James Fowler, Richard McElreath, and Oleg Smirnov), Political Psychology, Forthcoming.

Partisanship, Voting, and the Dopamine D2 Receptor Gene (with James Fowler), Journal of Politics, 71 (3): 1157–1171 (July 2009).

A Model of Genetic Variation in Human Social Networks (with James Fowler and Nicholas Christakis), Proceedings of the National Academy of Sciences, 106 (6): 1720–1724 (10 February 2009).

Genetic Variation in Preferences for Giving and Risk Taking (with David Cesarini, Magnus Johannesson, Paul Lichtenstein, and Bjorn Wallace), Quarterly Journal of Economics, 124 (2): 809-842 (May 2009). Appendix

The Role of Egalitarian Motives in Altruistic Punishment (with Tim Johnson, James Fowler, Richard McElreath, and Oleg Smirnov), Economics Letters, 102 (3): 192–194 (March 2009).

The Heritability of Partisan Attachment (with Jaime Settle and James Fowler), Political Research Quarterly, 62 (3): 601–613 (September 2009).

Two Genes Predict Voter Turnout (with James Fowler) Journal of Politics, 70 (3): 579-594 (July 2008)

Genetic Variation in Political Participation (with James Fowler and Laura Baker) American Political Science Review, 102 (2): 233-248 (May 2008)

Heritability of Cooperative Behavior in the Trust Game (with David Cesarini, James Fowler, Magnus Johannesson, Paul Lichtenstein, and Bjorn Wallace), Proceedings of the National Academy of Sciences, 105 (10): 3721-3726 (11 March 2008)

Egalitarian Motives in Humans (with James Fowler, Tim Johnson, Richard McElreath, and Oleg Smirnov), Nature, 446: 794-796, doi:10.1038/nature05651 (12 April 2007)