Richard Breen is Professor of Sociology and Fellow of Nuffield College, University of Oxford. Prior to that he was William Graham Sumner Professor of Sociology at Yale University. He works mainly on social stratification and inequality, quantitative methods, and formal models. Recent work includes studies of social mobility in Europe, analyses of long-term trends in educational inequality, and investigations of the relationship between income inequality and education. He is a member of the ESRC Research Committee. He has held visiting positions throughout Europe, including, most recently, at the WZB, Berlin, the University of Trento, and SFI, Copenhagen. He is a Fellow of the British Academy, a Fellow of the European Academy of Sociology, and a Member of both the Royal Irish Academy and Academia Europaea.