Ariel is AidData’s Chief Economist and Assistant Professor of Economics at the College of William & Mary. He previously served as Lecturer in Economics at the University of New South Wales in Sydney. He also served as Associate Director of Economic Analysis and Evaluation at the Millennium Challenge Corporation. Ariel has served as the principal investigator on a variety of large-scale experiments in developing countries, including Malawi, the Philippines, and the Solomon Islands. His work has been published in leading journals, including the Journal of Human Resources, the Journal of Comparative Economics, and Economic Development and Cultural Change. Ariel holds a PhD in Economics from the University of Maryland.