working papers:


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


Vitamin A Deficiency and Training to Farmers: Evidence from a Field Experiment in Mozambique, joint with Rute Caeiro, R&R


Migration, Political Institutions, and Social Networks in Mozambique, joint with Cátia Batista and Julia Seither, R&R


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


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


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


Social Influence and Political Behavior in Mozambique, joint with Matilde Grácio and Macartan Humphreys


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 peer-reviewed publications:


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

World Development, accepted for publication


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

Economic Development and Cultural Change, accepted for publication

See column at


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


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:


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


Consideraciones Empíricas de la Fuga de Cerebros, 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


main conferences organized:


Various NOVAFRICA Conferences and Workshops at Universidade Nova de Lisboa (2012 to present)


3rd Meeting of EGAP (Experiments in Governance and Politics) at Trinity College Dublin, May 7-8, 2010 - see EGAP's website