: The paper analyses the scientific research production of more than a thousand faculty members at Louis Pasteur University, a large and wellranked European research university. The originality of our approach is that we take into account both individual and collective (laboratory) determinants to explain individual productivity in terms of intensity and quality. We find that individual variables related to the position occupied (type and promotion) are significant while age is not always. The size of the lab plays negatively on performance. The intensity and quality of colleagues' research activities in labs are beneficial for individual research activity. Public contractual funding is the only type of funding which affects (weakly) research intensity. Individual research production figures are significantly enhanced by the presence of foreign post-docs.