Lijun Song is an Associate Professor of Sociology, Medicine, Health, and Society, and Asian Studies, and directs the SNAIL (Social Networks and Inequalities Lab). Her primary research interests include social networks, medical sociology and mental health, social stratification (gender/sexuality, race/ethnicity, and class), social psychology, and comparative historical sociology. She is currently developing social cost theory to understand the harmful consequences of social networks. Her work has appeared in such journals as Social Forces, Journal of Health and Social Behavior, Social Psychology Quarterly, Society and Mental Health, Social Science and Medicine, and Social Networks. Her scholarship has been supported by the National Institutes of Health, the Andrew W. Mellon Foundation, the Ford Foundation, and the Chiang Ching-kuo Foundation for International Scholarly Exchange. She has received two publication awards from the American Sociological Association: one from the Section on Asia/Asian America and the other from the Section on Sociology of Mental Health.