Javier Polavieja (Oxford University PhD in Sociology, 2001) is Research Fellow at IMDEA Social Sciences since October 1, 2009. His main fields of research are labor markets, social stratification and economic sociology. He has investigated the stratification impact of deregulation policies in Spain, the causes of variation in the rate of temporary employment across advanced economies, the economic and social determinants of sex-differences in job allocation and earnings, the impact of welfare state institutions on work-family-specialization strategies, and the effect of labor-market competition on native’s attitudes towards immigration. His work has been published in leading international journals including, among others, the European Sociological Review, Social Indicators Research, International Migration and Socio-Economic Review. He is also the author of the book Estables y Precarios: Desregulación Laboral y Estratificación Social en España (Madrid: Centro de Investigaciones Sociológicas, 2003). In 2006 Dr Polavieja received the Revista Internacional de Sociología Award for the Best Article published in 2004-2005, and in 2008 his work “The Incidence of Temporary Employment in Advanced Economies: Why is Spain Different?” was included in Michael Reich’s (ed.) Segmented Labor Markets and Labor Mobility (Northampton, MA: Edward Elgar, 2008), a collection of the most significant contributions published in the field. He has held academic positions at Nuffield College, Oxford, Universitat Pompeu Fabra, the Juan March Institute, the Catalan Institution for Research and Advanced Studies (ICREA), and the Institute for Economic Analysis (IAE-CSIC), where he acted as Scientific Coordinator of the INSIDE project (Insights on Immigration and Development). Dr. Polavieja holds honorary affiliations to the Institute for Social and Economic Research (ISER, University of Essex), the Institute for Economic Analysis (IAE-CSIC) and the Barcelona Graduate School of Economics (GSE). He has served as referee for top international journals and is a member of the Editorial Board of the Revista Española de Investigaciones Sociológicas. A former member of the Scientific Committee of the Catalan Infancy Panel, Dr Polavieja has been recently appointed member of the Advisory Committee of the Center for the Advanced Study in the Social Sciences (CEACS, Juan March Institute). He is also currently advising the Spanish Ministry of Science and Innovation as member of the Board for the Science against Poverty Conference to be held under the forthcoming Spanish Presidency of the European Union.