working papers:


Mobilizing Parents at Home and at School: An African Experiment on Primary Education, joint with Vincenzo Di Maro, Stefan Leeffers, and Danila Serra

See column at globaldev


Is Mobile Money Changing Rural Africa? Evidence from a Field Experiment, joint with Cátia Batista

See column at voxdev


Motivating Volunteer Health Workers in an African Capital City, joint with Mattia Fracchia and Teresa Molina-Millán


Can Technology Improve the Classroom Experience in Primary Education? An African Experiment on a Worldwide Program, joint with Joana Cardim and Teresa Molina-Millán


Closing the Gender Profit Gap?, joint with Cátia Batista and Sandra Sequeira

See column at voxdev


Keep It Simple: A Field Experiment on Information Sharing in Social Networks, joint with Cátia Batista and Marcel Fafchamps


Measuring Corruption in the Field Using Behavioral Games, joint with Alex Armand, Alexander Coutts, and Inês Vilela


Let's Call! Using the Phone to Increase Acceptance of COVID-19 Vaccines, joint with Alex Armand and Mattia Fracchia



Introducing Mobile Money in Rural Mozambique: Evidence from a Field Experiment, joint with Cátia Batista


A Model of Vote-buying with an Incumbency Advantage


Corrupted Scholarships


main publications:


Preventing Islamic Radicalization: Experimental Evidence on Anti-social Behavior, joint with Inês Vilela

Journal of Comparative Economics, accepted for publication



COVID-19 Vaccine Acceptance and Hesitancy in Low and Middle Income Countries, and Implications for Messaging, joint with Julio S. Solis Arce et al.

Nature Medicine, 2021,


Information, Get-out-the-vote Messages, and Peer Influence: Causal Effects on Political Behavior in Mozambique, joint with Matilde Grácio

Journal of Development Economics, 2021, 151, 102665



Can ATMs Get Out the Vote? Evidence from a Nationwide Field Experiment, joint with João Pereira dos Santos and José Tavares

European Economic Review, 2021, 134, 103691



Does Information Break the Political Resource Curse? Experimental Evidence from Mozambique, joint with Alex Armand, Alexander Coutts, and Inês Vilela

American Economic Review, 2020, 110(11), pp. 3431-3453

See column at globaldev



Adopting Mobile Money: Evidence from an Experiment in Rural Africa, joint with Cátia Batista

American Economic Association Papers and Proceedings, 2020, 110, pp. 594–598


Improving Access to Savings through Mobile Money: Experimental Evidence from African Smallholder Farmers, joint with Cátia Batista

World Development, 2020, 129, 10490


Knowledge of Vitamin A Deficiency and Crop Adoption: Evidence from a Field Experiment in Mozambique, joint with Rute Caeiro

Agricultural Economics, 2020, 51(2), pp. 175-190



Voting and Peer Effects: Experimental Evidence from Mozambique, joint with Marcel Fafchamps and Ana Vaz

Economic Development and Cultural Change, 2020, 68(2), pp. 567-605

See column at


Do Migrant Social Networks Shape Political Attitudes and Behavior at Home?, joint with Cátia Batista and Julia Seither

World Development, 2019, 117, pp. 328-343

See mention by The Economist


Foreign Aid Preferences and Perceptions in Donor Countries, joint with Daniel Kaufmann and Eoin McGuirk

Journal of Comparative Economics, 2019, 47(3), pp. 601-617


Does Electoral Observation Influence Electoral Results? Experimental Evidence for Domestic and International Observers in Mozambique, joint with Stefan Leeffers

World Development, 2019, 114, pp. 42-58


Return Migration, Self-selection, and Entrepreneurship, joint with Cátia Batista and Tara McIndoe-Calder

Oxford Bulletin of Economics and Statistics, 2017, 79(5), pp. 797-821

See mention by The Economist


Is Information Power? Using Mobile Phones and Free Newspapers during an Election in Mozambique, joint with Jenny Aker and Paul Collier

Review of Economics and Statistics, 2017, 99(2), pp. 185-200

See mention at The Guardian

See mention at TIME magazine



Is Vote-buying Effective? Evidence from a Field Experiment in West Africa

Economic Journal, 2014, 124(574), pp. 356-387

See mention by the Wall Street Journal



Votes and Violence: Evidence from a Field Experiment in Nigeria, joint with Paul Collier

Economic Journal, 2014, 124(574), pp. 327-355

See column at

See mention at the Wall Street Journal


Political Violence and Social Networks: Experimental Evidence from a Nigerian Election, joint with Marcel Fafchamps

Journal of Development Economics, 2013, 101, pp. 27-48


Violence, Bribery, and Fraud: The Political Economy of Elections in Sub-Saharan Africa, joint with Paul Collier

Public Choice, 2012, 153(1-2), pp. 117-147


Testing the 'Brain Gain' Hypothesis: Micro Evidence from Cape Verde, joint with Cátia Batista and Aitor Lacuesta

Journal of Development Economics, 2012, 97(1), pp. 32-45

See mention by The Economist


Do Migrants Improve Governance at Home? Evidence from a Voting Experiment, joint with Cátia Batista

World Bank Economic Review, 2011, 25(1), pp. 77-104


Legal Corruption, joint with Daniel Kaufmann

Economics and Politics, 2011, 23(2), pp. 195-219


Does Oil Corrupt? Evidence from a Natural Experiment in West Africa

Journal of Development Economics, 2010, 92(1), pp. 28-38


Clientelism and Vote Buying: Lessons from Field Experiments in African Elections, joint with Leonard Wantchekon

Oxford Review of Economic Policy, 25(2), pp. 292-305


other publications:


International Migration and Social Network Spillovers of Political Norms, joint with Cátia Batista and Julia Seither, in L. Brites Pereira, M. E. Mata, and M. Rocha de Sousa, 2020, Economic Globalization and Governance - Essays in Honor of Jorge Braga de Macedo, Springer


International Migration and the Transfer of Political Norms: Examples from Cape Verde and Mozambique, joint with Cátia Batista and Julia Seither, in L. Chauvet, F. Gubert, T. Jaulin, and S. Mesplé-Somps, 2018, Les Migrants, Acteurs des Changements Politiques en Afrique?, DeBoeck Supérieur


Oil, Corruption, and Vote-buying: A Review of the Case of Sao Tome and Principe, in S. Rose-Ackerman and T. Soreide, 2011, International Handbook on the Economics of Corruption, Volume II, Edward Elgar Publishing


Empirical Considerations about Brain Drain, joint with Catia Batista and Aitor Lacuesta, Moneda y Crédito, 2008, 226, pp. 33-71


A Theory of Corruption, Political Exclusion, and Windfalls, in M. Gradstein and K. Konrad (2007), Institutions and Norms in Economic Development, MIT Press


Review of C. Sampford, A. Shacklock, C. Connors, and F. Galtung (Eds), Measuring Corruption, Global Crime, 8(1), February 2007, pp. 101-104