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(**) = papers with more than 1,000 citations
(*) = papers with more than 100 citations

Year: 2013

Zak, P.J., and Barraza, J.A. 2013. Neurobiology of Collective Action. Frontiers in Neuroscience. Vol. 7 No. 211; DOI=10.3389/fnins.2013.00211 [Link]

Barraza, J.A., Grewal, N.S., Ropacki, S., Perez, P., Gonzalez, and Zak P.J. 2013. Effects of a 10-Day Oxytocin Trial in Older Adults on Health and Well Being. Experimental and Clinical Psycopharmacology. 21(2) pp. 85-92 [Digital version]

Lin, P-Y., Grewal, N.S., Morin, C., Johnson, W.D., Zak, P.J. 2013. Oxytocin increases the influence of public service advertisements. PLoS ONE 8(2): e56934. doi: 10.1371/journal.pone.0056934. [Link]

Zak, P.J. 2013. Oxytocin and the reduction of aggression. In Topics in the Neurobiology of Aggression: Implications to Deterrence, Diane DiEuliis and Hrair Cabayan, Editors, U.S. Department of Defense. [Digital version] [Link]

Merolla, J.L, Burnett, G., Pyle, K., Ahmadi, S., Zak, P. 2013. Oxytocin and the biological basis for interpersonal and political trust. Political Behavior, 34(4), doi: 10.1007/s11109-012-9219-8. [Digital version]


Morhenn, V., Beavin, L.E., Zak, P.J. 2012. Massage increases oxytocin and reduces adrenocorticotropin hormone in humans. Alternative Therapies in Health and Medicine, 18(6): 11-18. [Digital version]

Sapra, S., Beavin, L.E., Zak, P.J. 2012. A combination of dopamine genes predicts success by professional Wall Street traders. PLoS ONE 7(1): e30844. doi: 10.1371/journal.pone.0030844. [Digital version]


Zak, P.J. 2011. Moral Markets. Journal of Economic Behavior & Organization, 77(2): 212-233. [Digital version]

Barraza, J.A., McCullough, M.E., Zak, P.J. 2011. Oxytocin infusion increases charitable donations regardless of monetary resources. Hormones and behavior, 60: 148-151. [Digital version]

Zak, P.J. 2011. The physiology of moral sentiments. Journal of Economic Behavior & Organization, 77: 53-65. [Digital version]


Zak, P.J., Kugler, J. 2010. Neuroeconomics and international studies: A new understanding of trust. International Studies Perspectives, 12: 136-152.
[Digital version]

Vercoe, M., Zak, P.J. 2010. Inductive modeling using causal studies in neuroeconomics: brains on drugs. Journal of Economic Methodology, 17(2): 123-137. [Digital version]

Sapra, S.G., Zak, P.J. 2010. Eight lessons from neuroeconomics for money managers. CFA Institute Research Publications, Behavioral Finance and Investment Management: 2010 (2): 63-76.
[Digital version]


Zak, P.J., Kurzban, R., Ahmadi, S. Swerdloff, R.S., Park, J., et al. 2009. Testosterone administration decreases generosity in the ultimatum game. PLoS ONE, 4(12): e8330. doi: 10.1371/journal.pone.0008330. [Digital version]

Barraza, J. A. & Zak, P. J. 2009. Empathy toward strangers triggers oxytocin release and subsequent generosity. Annals of the New York Academy of Sciences, 1167: 182-189. [Digital version]


Zak, P. J. 2008. The neurobiology of trust. Scientific American, June: 88-95. [Digital version]

Zak, P. J. 2008. Moral markets: the critical role of values in the economy. Princeton University Press. [Digital version]

Morhenn, V. B., Park, J. W., Piper, E. & Zak, P. J. 2008. Monetary sacrifice among strangers is mediated by endogenous oxytocin release after physical contact. Evolution and Human Behavior, 29: 375–383. [Digital version]

Hoge, E. A., Pollack, M. H., Kaufman, R. E., Zak, P. J. & Simon, N. M. 2008. Oxytocin levels in social anxiety disorder. CNS Neuroscience &Therapeutics, 14: 165–170. [Digital version]


Zak, P. J. 2007. The neuroeconomics of trust. Ch 2. in Renaissance inBehavioral Economics. R. Frantz, Ed. Routledge [Digital version]

Park, J. W. & Zak, P. J. 2007. Neuroeconomics studies. Analyse and Kritik, 29: 47-59. [Digital version]

(*) Zak, P. J., Stanton, A. A. & Ahmadi, S. 2007. Oxytocin increases generosity in humans. Public Library of Science ONE, 2(11):e1128. doi:10.1371/journal.pone.0001128, [Digital version]


Zak, P. J. & Fakhar, A. 2006. Neuroactive hormones and interpersonal trust: international evidence. Economics & Human Biology, 4: 412-429. [Digital Version]


Zak, P. J. 2005. Trust: a temporary human attachment facilitated by oxytocin. Behavioral and Brain Sciences, 28(3): 368-369. [Digital version]

(**) Kosfeld, M., Heinrichs, M., Zak, P. J. Fischbacher, U. & Fehr, E. 2005. Oxytocin increases trust in humans. Nature, 435(2): 673-676. [Digital version]

(*) Zak, P. J., Kurzban, R. & Matzner, W. T. 2005. Oxytocin is associated with human trustworthiness. Hormones and Behavior, (48): 522-527. [Digital version]

Zak, P. J., Borja, K., Matzner, W. T. & Kurzban, R. 2005. The neuroeconomics of distrust: sex differences in behavior and physiology. American Economic Review Papers and Proceedings, 95(2): 360-363. [Digital version]

Year: 2004

(*) Zak, P. J., Kurzban, R. & Matzner, W. T. 2004. The neurobiology of trust. Annals of the New York Academy of Sciences, 1032: 224-227. [Digital version]

Hirshleifer, J. J. & Zak, P. J. 2004. The Bioeconomics of social behavior: introduction. Journal of Bioeconomics, 6(1): 1-2. [Digital version]

(*) Zak, P. J. 2004. Neuroeconomics. Philosophical Transactions of the RoyalSociety B (Biology), 359(1451): 1737-1748. [Digital version]


Denzau, A. T. & Zak, P. J. 2003. Explore and exploit: an evolutionary analysis of institutional dynamics. In Human Nature and Public Policy: An Evolutionary Approach, Albert Somit and Steven A. Peterson, Editors, pp. 139-160, Palgrave Macmillan.

Zak, P. J. 2003. Trust. Capco Institute Journal of Financial Transformation, 7: 13-21. [Digital version]


Geddes, R. & Zak, P. J. 2002. The rule of one-third. Journal of Legal Studies, 31(1): 119-137. [Digital version]

Zak, P. J. 2002. Institutions, property rights and growth. Louvain Economic Review, 68(1-2): 55-73.

Knack, S. & Zak, P. J. 2002. Building trust: public policy, interpersonal trust, and economic development. Supreme Court Economic Review, 10: 91-107. [Digital version]

Zak, P. J. & Park, K. W. 2002. Population genetics and economic growth. Journal of Bioeconomics, 4(1): 1-37. [Digital version]


(**) Zak, P. J. & Knack, S. 2001. Trust and growth. The Economic Journal, 111: 295-321. [Digital version]

Zak, P. J. & Denzau, A.T. 2001. Economics is an evolutionary science. In Evolutionary Approaches in the Behavioral Sciences: Toward a Better Understanding of Human Nature, Albert Somit and Stephen Peterson, Editors, pp. 31-65, JAI Press. [Digital version]


Zak, P. J. 2000. Larceny. Economics of Governance, 1: 157-179. [Digital version]