URL des Documents de travail : http://centredeconomiesorbonne.univ-paris1.fr/bandeau-haut/document-de-travail/Documents de travail du Centre d'Economie de la Sorbonne 2010.99 - ISSN : 1955-611XThe article analyses how the changes in firm's human resources practices shaped the dynamics of labour market segmentation in France. The survey FQP 2003 contains a rich information to describe jobs. It offers standard information as the sector or the size of the company and also more original information on the concrete conditions of job as the use of the TIC, the rate of work, the contact with the public, the type of hierarchical control... Our approach focused on the permanent contracts. We exploit this information to analyze the link between job c...