Berk Özler is a lead economist in the Development Research Group, Poverty Cluster. He received his B.Sc. in Mathematics from Boğaziçi University in 1991, and his Ph.D. in Economics from Cornell University in 2001. After working on poverty and inequality measurement, poverty mapping, and the 2006 World Development Report on Equity and Development earlier, he decided to combine his interests in cash transfer programs and HIV risks facing young women in Africa by designing a field experiment in Malawi. He has since been involved in a number of cluster-randomized field experiments. More recently, he has been interested in finding effective approaches to reduce unintended pregnancies, especially among adolescent females and young women, which has led to an adaptive experiment in Cameroon, trialing approaches to increase the take-up of modern contraceptives. He is currently interested in the economics of animal welfare. He is a co-founder of and a regular contributor to the Development Impact blog.