I am a Professor of Sociology at UC Berkeley and an associate fellow of the Max Plack-Sciences Po Center on Coping with Instability in Market Societies (Maxpo). A comparative sociologist by training and taste, I am interested in national variations in knowledge and practice. My first book, Economists and Societies (Princeton University Press 2009), explored the distinctive character of the discipline and profession of economics in three countries. A second book, tentatively called Measure for Measure: Social Ontologies of Classification, will investigate the cultural and institutional logic of what we may call “national classificatory styles” across a range of empirical domains. Current studies for this book include environmental valuation, the digitization of books and the classification of wines in France and the United States. Other ongoing research focuses on the moral underpinnings and moral consequences of economic processes and technologies; new forms of social stratification in the digital economy (with Kieran Healy); the comparative study of political organization (with Evan Schofer and Brian Lande); the microsociology of courtroom exchanges (with Roi Livne); the sociology of economics (with Yann Algan and Etienne Ollion).