In North-American and European cities, youth live in precarious social and economic conditions. The issue of employment has become a political problem. In this volume, sociological, economical and ethnographical perspectives are used to explain ethnic discrimination, inequalities at school, unemployment and marginalization. Work remains a central value in young peoples' lives who not only are victimized but also try to find escapes. Originally in French, this extended and updated book contains contributions by Enrico Pugliese, Saskia Sassen, Min Zhou, François Dubet, Paul Anisef, Paul Axelrod, Ida Susser and others.