@article{Aker2012,
author = {Aker, Jenny C. and Ksoll, Christopher and Lybbert, Travis J.},
title= {Can mobile phones improve learning? Evidence from a field experiment in Niger},
year = {2012},
doi = {10.1257/app.4.4.94},
volume = {4},
number = {4},
pages = {94--120},
}