This text gives an account of an interdisciplinary conference, highlighting actual exchanges between economics and social sciences. Institutionnal definitions of the disciplines, though they are operating, do not allow to foresee the contents of the researchs conducted under their labels. Internal evolutions of the disciplines, notably due to the development of the New Economic Sociology, have entailed decompartmentalizations concerning research objects, but also ways to interprète the practices and behaviours. A clarification of those evolutions is necessary to broach the study of contacts between economics and social sciences. When a discipline tackles new objects or concepts, questions arise on transferts and borrowings from the departure discipline. Those borrowings, more or less respectful of the initial concepts, can lead to misunderstandings in the dialogue between economics and social sciences.
