This article analyses all the associate professor accreditations delivered by the National University Council (CNU) between 2005 and 2013 by subjecting them to two statistical operations. The first makes visible the relational space between disciplines through the case of individuals who have been simultaneously accredited by several sections of the CNU. The second accounts for the strong relationship between the establishment of a disciplinary section and the chances of securing an academic position for candidates. This sheds light on an important issue that approaches based solely on bibliometrics tend to bypass : the entanglement of academic and scientific logics. Far from being random, multiple accreditations express both epistemological closeness and professional strategies. The upstream social factors that facilitate the disposition toward interdisciplinarity and the downstream logic of academic marketability to which they seem to correspond make it possible to understand differently the recent calls for interdisciplinarity.