David Sungho Park is an Associate Professor of Economics at KDI School of Public Policy and Management in Sejong, South Korea. He is an applied microeconomist who uses randomized controlled trials and quasi-experimental methods to study how low-income households and small firms make decisions and how policy can improve their outcomes. Much of his work draws on large-scale field trials in Sub-Saharan Africa, South Asia, and beyond. His published research covers cash transfers, intimate partner violence, agricultural input adoption, food security, and survey measurement, and his current agenda extends to energy and climate and to the retail productivity of small businesses. He received his PhD in Economics from the University of California, Santa Cruz.