@unpublished{Attanasio2004,
author = {Orazio Attanasio and Costas Meghir and Ana Santiago},
title = {Education choices in Mexico: using a structural model and a randomized experiment to evaluate PROGRESA},
year = {2004},
month = {Jun},
volume = {pp},
issn = {1742-0415},
url = {http://www.ifs.org.uk/edepo/wps/ewp0404.pdf},
}