Dr Diego Coletto is Assistant professor in Economic Sociology at the Department of Sociology and Social Research, University of Milano-Bicocca, Milan (Italy). Degree in Political Sciences and Ph.D. in Economic Sociology. His main interests are the informal economy, sociology of development, urban ethnography and employment relations. In recent years he has participated to international and national research projects focused on changes in employment relations, with particular attention to the informal economy, employment/unemployment in economic crisis and to forms of flexible work.