Stress, Ethnicity, and Prosocial Behavior

We thank the participants for their time; the Busara Center for Behavioral Economics, Nairobi for implementing the study; and Clemens Kirschbaum, Ph.D., Technische Universität Dresden, Germany, for analyzing the salivary cortisol samples. This study was approved by the Princeton IRB (Protocol #7200), as well as the Kenya Medical Research Institute (Protocol #494) and the Kenyan Pharmacy and Poisons Board (PPB/ECCT/15/12/04/2016(37)). Harvard, Northwestern, and Bocconi University IRBs and the NBER IRB ceded review to Princeton after initial approval. It was pre-registered at https://www.socialscienceregistry.org/trials/3937/. We are grateful for funding provided by the NSF. We thank Joris Mueller for stellar research assistance. The views expressed herein are those of the authors and do not necessarily reflect the views of the National Bureau of Economic Research.