My primary research interest is in the emergence of categories of people. I attempt to understand such processes by studying the sociology of genetics and developmental disorders (with collaborators from Columbia, Harvard and Drexel Universities), as well as studying how employers evaluate employees and how students form friendships (with collaborators from Tel Aviv University). Methodologically I am committed to rigorous multi-method analysis, with a special interest in network analysis. My previous studies examined the meaning of educational categories in the Israeli higher education system (with Shavit, European Sociological Review 2006), historical trends in the gender gap across racial group in America (with McDaniel, Buchman and DiPrete, Demography 2011), and consensus formation in science (with Bearman, American Sociological Review 2010; 2012).