Yann Bramoullé is a CNRS Research Fellow at Aix-Marseille University. He graduated from École Polytechnique in France in 1995 and obtained his PhD from the University of Maryland, College Park in 2002. He was an economics professor at Laval University in Québec until 2012 and was nominated for the prize of the best French young economist in 2013. He currently works on the interaction between markets and networks, a project for which he obtained an ERC consolidator grant in 2014, on strategic interaction and networks, altruism in networks, and the econometrics of social networks. Andrea Galeotti is Professor of Economics at the European University Institute and University of Essex. He is a leading international scholar in the study of social and economic networks. He has published articles in, among others, The American Economic Review, Review of Economic Studies, and the American Journal of Political Science. He serves as co-Editor of The Economic Journal and is a Board Member of The Review of Economic Studies. Brian Rogers is an Associate Professor in Economics at Washington University in St. Louis, where he also directs the Missouri Social Science Experimental Laboratory (MISSEL). Prof. Rogers received his Ph.D. from Caltech in 2006 and was on the faculty in Managerial Economics and Decision Sciences (MEDS) at the Kellogg School of Management at Northwestern University from 2006-2013. His research is broadly in microeconomic theory and game theory, with a particular emphasis on the role of networks and social interactions in strategic models. Recent work includes incorporating incentives into epidemiological diffusion models, as well as understanding the coevolution of partner choices and repeated play in social models of games.