@unpublished{Attanasio2008,
author = {Orazio Attanasio and Luca  Pellerano and Sandra Polania},
title = {Building trust? Conditional cash transfers and social capital},
year = {2008},
month = {Apr},
url = {http://www.ifs.org.uk/edepo/wps/ewp0802.pdf},
}