See Fletcher:

Just a bit of cushion: The role of a simple savings device in meeting planned and unplanned expenses in rural Niger

Mobile Phones and Economic Development in Africa

Is Information Power? Using Mobile Phones and Free Newspapers During an Election in Mozambique

Social Networks and Household Welfare in Tanzania: Working Together to Get Out of Poverty

Are Borders Barriers? The Impact of International and Internal Ethnic Borders on Agricultural Markets in West Africa

Learning Without Teachers? A Randomized Experiment of a Mobile Phone-Based Adult Education Program in Los Angeles

Cash or Coupons? Testing the Impacts of Cash versus Vouchers in the Democratic Republic of Congo

Droughts, Grain Markets and Food Crisis in Niger

Does Digital Divide or Provide? The Impact of Cell Phones on Grain Markets in Niger

Rainfall Shocks, Markets, and Food Crises: Evidence from the Sahel

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