The devalorization of the diplomas results not only from the fall of the relative position of the title in the hierarchy of the diplomas (effect of offer) but also of the evolution of the demand of graduates. The majority of the studies on the subject especially were interested in the effects of...

The educational policies for the vocational trainings often suppose that the formation in a speciality is necessary to reach a job of identical speciality. This assumption is interrogated on the theoretical and empirical level. The study is carried out from French data, representative of the...