 After working as an assistant professor at Department of Economics at Harvard University 1988-1991, she has worked at Department of Economics, Princeton University and Woodrow Wilson School of Public and International Affairs since 1991, becoming a professor in 1997 and the Alexander Stewart 1886 Professor of Economics and Public Affairs in 2007.She currently serves as the Alexander Stewart 1886 Professor of Economics and Public Affairs Emeritus (effective as of July 1, 2017).Her research fields include labor economics, health economics and development studies.