for reviews of the manuscript. Moreover, anyone who has worked on early childhood development in low-income settings would not be surprised to hear that Patrice Engle and Sally Grantham-McGregor provided useful advice on the range of programs globally. Peter Lanjouw offered specifi c insights for chapter 2, and Sinit Mehtsun provided excellent research assistance for chapter 3. The data on Mozambique reported in chapter 1 would not have been available if not for the efforts of Barbara Bruns, Vitor Pereira, Michelle Perez Maillard, and the staff from the Save the Children offi ce in Mozambique, as well as the Mozambican survey fi rm Austral-Cowi. Similarly, Norbert Schady, Alison Whyte, Ryan Booth, and staff from the Cambodian survey fi rm B.N. Consult made the analysis of Cambodia possible.