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Social Networks and Technology Adoption in Northern Mozambique*


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     We thank Tim Besley, Robin Burgess, Anne Case, Tim Conley, Marcel Fafchamps, Raquel Fernandez, Andrew Foster, Markus Goldstein, Boyan Jovanovic, Rachel Kranton, Magnus Lindelow, Ted Miguel, Rohini Pande, Debraj Ray, Giorgio Topa and seminar participants at Berkeley, Bocconi, Boston College, Boston University, Chicago, Essex ISER, LSE, NYU, Oxford, Princeton, Southampton, Stanford, Toronto, and the World Bank for useful comments. We also thank the editor, Andrew Scott, and three anonymous referees for useful suggestions. We are especially grateful to Jorge Gallego-Lizon and those at Movimondo who helped collect the data. All errors remain our own.


We present evidence on how farmers’ decisions to adopt a new crop relate to the adoption choices of their network of family and friends. We find the relationship to be inverse-U shaped, suggesting social effects are positive when there are few adopters in the network, and negative when there are many. We also find the adoption decisions of farmers who have better information about the new crop are less sensitive to the adoption choices of others. Finally, we find that adoption decisions are more correlated within family and friends than religion-based networks, and uncorrelated among individuals of different religions.