1. Improving middle school quality in poor countries: Evidence from the Honduran Sistema de Aprendizaje Tutorial (with Erin Murphy-Graham, David Torres Irribarra, Claudia Aguilar, and Renán Rápalo). Educational Evaluation and Policy Analysis, forthcoming.
    2. The heterogeneous impact of conditional cash transfers (with Sebastian Galiani). Journal of Public Economics, 2013.
    3. Private costs and the rate of return to primary education. Applied Economics Letters, 1999.