Quarterly Journal of Economics, Vol.128, No 1, 105--164, January 2012, 10.1093/qje/qjs050
Christine Marie George, Alexander van Geen, Vesna Slavkovich, Ashit Singha, Diane Levy, Tariqul Islam, Kazi Matin Ahmed, Joyce Moon-Howard, Alessandro Tarozzi, Xinhua Liu, Pam Factor-Litvak and Joseph Graziano