The returns to educational investments hinge on whether such investments can improve the quality and persistence of educational gains. We report the results from a randomized evaluation of an adult education program in Niger, in which some students learned how to use simple mobile phones...

Price dispersion across markets is common in developing countries. Using novel market and trader-level data, this paper provides estimates of the impact of mobile phones on price dispersion across grain markets in Niger. The introduction of mobile phone service between 2001 and 2006 explains a...