Dr. Mark A. Constas is an Associate Professor in the International and Development Economics group in the Charles H. Dyson School of Applied Economics & Management at Cornell University. He also holds the position of International Professor of Agriculture and Life Sciences at Cornell and is a Fellow of the Atkinson Center for Sustainability. With a specialization in impact evaluation and measurement, his research is focused on the development of assessment tools and evaluation designs to measure the ways in which households and communities situated in stressed and shock-prone contexts can achieve and maintain well-being. His work has appeared in a selection of competitive peer-reviewed journals intended for academic audiences and in other publication outlets intended for policy audiences. Professor Constas regularly participates in expert panels on food security and measurement and has served as an advisor to several organizations within the United Nations system.