Running head: Incentives, Social Preferences, and Cooperation 1 In Press: Decision Not all Prisoner’s Dilemma Games are Equal: Incentives, Social Preferences, and Cooperation Frederic Moisan 1 , Robert ten Brincke 2 , Ryan O. Murphy 3 , Cleotilde Gonzalez 1* 1 Dynamic Decision Making Laboratory Department of Social and Decision Sciences Carnegie Mellon University 2 ETH Zürich 3 University of Zürich Author Note This research was supported by the National Science Foundation Award number: 1530479 and by the Army Research Laboratory under Cooperative Agreement Number W911NF-13-2-0045 (ARL Cyber Security CRA) to Cleotilde Gonzalez. The views and conclusions contained in this document are those of the authors and should not be interpreted as representing the official policies, either expressed or implied, of the Army Research Laboratory or the U.S. Government. * Correspondence concerning this article should be addressed to Cleotilde Gonzalez, Dynamic Decision Making Laboratory, Carnegie Mellon University, Pittsburgh, PA 15213. E-mail: coty@cmu.edu Words: 5253 words