Professor of Sociology at Sciences Po Paris. He is interested in the political economy of the welfare state, public policy and social capital. He has a long-standing expertise in labour market and family policy. He has published 3 books and 36 peer-reviewed articles in political economy (New Political Economy, Review of International Political Economy), social policy (Journal of European Social Policy, Social Policy & Administration, Social Policy & Society, Social Politics), sociology (Research in Social Stratification and Mobility, International Journal of Comparative Sociology, L’Année Sociologique, Stato e Marcato, The Tocqueville Review) and political science journals (Political Studies Review, Policy & Politics).