Voting and Peer Effects: Experimental Evidence from Mozambique
Abstract:
Voter education campaigns often aim to increase voter participation and political accountability. We follow randomized interventions implemented nationwide during the 2009 Mozambican elections using a free newspaper, leaflets and text messaging. We investigate whether treatment effects were transmitted through social networks (kinship and chatting) or geographical proximity. For individuals personally targeted by the campaign, we estimate the reinforcement effect of proximity to other targeted individuals. For untargeted individuals we estimate the diffusion of the campaign depending on proximity to targeted individuals. We find evidence for both effects, similar across the different treatments and across the different connectedness measures. We observe that the treatments worked through networks by raising the levels of information and interest about the election, in line with the average treatments effects. However, differently from those average effects, we find negative network effects of voter education on voter participation. We interpret this result as a free-riding effect, likely to occur for costly actions.
Marcel Fafchamps is Professor of Development Economics at Oxford University, a Professional Fellow at Mansfield College and the Deputy Director of the Centre for the Study of African Economies. Fafchamps’ research is focused primarily on institutions that enable exchange, including risk-coping strategies, market institutions, intra-household allocation and the allocation of economic activity across space, with a concentration on the regions of Africa and South Asia. He is also interested in spatial networks and social networks from a methodological perspective. His scholarship on the topic of market institutions is summarized in Market Institutions in Sub-Saharan Africa, (MIT Press, 2004), which his work on risk coping is addressed in Rural Poverty, Risk, and Development (Elgar Press, 2003). Fafchamps studied law and economics at the Université Catholique de Louvain and spent nearly five years working on rural development in Africa for the International Labour Organization before earning his Ph.D. in agricultural economics at the University of California, Berkeley in 1989. He taught development economics at Stanford from 1989 until 1998.
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Francis Fukuyama
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Francis Fukuyama is the Olivier Nomellini Senior Fellow at Stanford University's Freeman Spogli Institute for International Studies (FSI), and a faculty member of FSI's Center on Democracy, Development and the Rule of Law (CDDRL). He is also Director of Stanford's Ford Dorsey Master's in International Policy, and a professor (by courtesy) of Political Science.
Dr. Fukuyama has written widely on issues in development and international politics. His 1992 book, The End of History and the Last Man, has appeared in over twenty foreign editions. His book In the Realm of the Last Man: A Memoir will be published in fall 2026.
Francis Fukuyama received his B.A. from Cornell University in classics, and his Ph.D. from Harvard in Political Science. He was a member of the Political Science Department of the RAND Corporation, and of the Policy Planning Staff of the US Department of State. From 1996-2000 he was Omer L. and Nancy Hirst Professor of Public Policy at the School of Public Policy at George Mason University, and from 2001-2010 he was Bernard L. Schwartz Professor of International Political Economy at the Paul H. Nitze School of Advanced International Studies, Johns Hopkins University. He served as a member of the President’s Council on Bioethics from 2001-2004. He is editor-in-chief of American Purpose, an online journal.
Dr. Fukuyama holds honorary doctorates from Connecticut College, Doane College, Doshisha University (Japan), Kansai University (Japan), Aarhus University (Denmark), the Pardee Rand Graduate School, and Adam Mickiewicz University (Poland). He is a non-resident fellow at the Carnegie Endowment for International Peace. He is a member of the Board of Trustees of the Rand Corporation, the Board of Trustees of Freedom House, and the Board of the Volcker Alliance. He is a fellow of the National Academy for Public Administration, a member of the American Political Science Association, and of the Council on Foreign Relations. He is married to Laura Holmgren and has three children.
(October 2025)