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Berk ?zler was a Lead Economist and Research Manager in the Development Research Group, until his departure from the ÐÓ°ÉÂÛ̳ in 2025. He received his B.Sc. in Mathematics from??in 1991 and his Ph.D in Economics from??in 2001, immediately after which he started working at the ÐÓ°ÉÂÛ̳'s Development Research Group. After working on poverty and inequality measurement, poverty mapping, and the 2006 World Development Report on Equity and Development, he decided to combine his interest in cash transfer programs and HIV risks facing young women in Africa by designing and implementing a large cash transfer experiment in Malawi between 2008-2010.?Berk has since conducted a number of cluster-randomized field experiments on a range of topics, including??using improved contraceptive counseling to reduce unintended pregnancies, especially among adolescent females and young women.?He is also interested in the economics of animal welfare. He is a co-founder of and a contributor to the?.