1. “Working for the Future: Female Factory Work and Child Health in Mexico, ”,2009
2. “More Power to the Pill: The Impact of Contraceptive Freedom on Women's Life Cycle Labor Force Participation, ”;Quarterly Journal of Economics,2006
3. “Cash or Condition? Evidence from a Cash Transfer Experiment, ”;Quarterly Journal of Economics,2011
4. “An Economic Analysis of Fertility, ”,1960