1. Primary education in Delhi: how much do the children learn?;Aggarwal,1998
2. Worldwide shadow education: outside-school learning, institutional quality of schooling, and cross-national mathematics achievement;Baker;Educational Evaluation and Policy Analysis,2001
3. Counting the full cost: community and parental financing of education in East Asia;Bray,1996
4. The shadow education system: private tutoring and its implications for planners;Bray,1999
5. The private costs of public schooling: household and community financing of primary education in Cambodia;Bray,1999