I am Associate Professor of Sociology, and faculty affiliate of the Columbia Population Research Center (CPRC), Weatherhead East Asian Institute (WEAI), Institute for Social and Economic Research and Policy (ISERP), Institute of Latin American Studies (ILAS), and Data Science Institute (DSI) at Columbia University. My research focuses on social stratification and migration/immigration, with a primary emphasis on (1) how migration intersects with sociopolitical processes to shape inequalities in receiving and origin societies, and (2) how social and demographic processes influence political development. Within these general areas, I have engaged a range of research fields in labor market inequality, collective action, health, child development, and gender. I have pursued this research agenda from a comparative perspective, using data from multiple settings and directly comparing different contexts. My research has been funded by grants from the National Science Foundation, the National Institutes of Health (including a K01 Career Development Award), the Russell Sage Foundation, and Chiang Ching-kuo Foundation. I have also collaborated with a team of international scholars to conduct a national survey on migration and families and children in China.