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Our article provides a typological analysis of the regulation of common scientists on the basis of their linguistic coding activity. We analyse the commonalities from the perspective of the displayed functioning of communities facilitated by their members. We question the apparent homogeneity of the epistemic communities that support these communities by conducting an analysis based on linguistic imaginaries. That question calls into question the homogeneity of the 'community' form. On the one hand, we carry out a wide review of social science literature and, on the other hand, carry out a sociolinguistic analysis of the lexical statements resulting from the self-presentations of 23 communes. This critical analysis leads to the segmentation of all the groups that develop these commonalities into two families: communities with a stable and regular profile and for scientific or technical purposes, and groups with a hot and unstable profile and with a view to social transformation. ; International audience We aim to propose a typological analysis of the regulation of scientific creative commons from the linguistic codification activity. We analyze the commons since the point of view of the communities' work. We point the apparent homogeneity of the epistemic communities that support these commons. This leads to a questioning about the homogeneity of the "community". We proceed, on the one hand, by means of a comparison between different research programs developed in the sociology of science and politics, on the other hand, by conducting a sociolinguistic analysis of the lexical statements resulting from the self-presentations of 23 creative commons. This critical analysis leads to segmenting all the groups that develop these commons into two families: communities with a stable and regular profile and scientific aims, and collectives with an abundant and unstable profile and with a view to social transformation. ; Our article provides a typological analysis of the regulation of common scientists on the basis of ...

The limitation of global warming below 2°C requires rapid and significant deployment of renewable energies in the power sector. Policies to support innovation and diffusion of renewables have been implemented for more than 20 years. There is currently a debate surrounding their economic and environmental efficiency and the right balance between support for innovation and support for diffusion. This article sheds light on the stakes of this debate by presenting the results of the econometric literature which evaluates the effect of these policies and compares these results with the main conclusions of non-econometric studies. The results show that innovation policies and diffusion policies have a positive impact on renewable energies and so confirm non-econometric studies. However, they reveal differentiated effects ; La limitation du réchauffement climatique nécessite un déploiement rapide et important des énergies renouvelables (ENR). Des politiques de soutien visant l'innovation et la diffusion de ces technologies ont été mises en oeuvre depuis plus de 20 ans. Il existe aujourd'hui un débat sur leur efficacité environnementale et économique et sur le bon équilibre entre soutien à l'innovation et à la diffusion. Cet article éclaire les enjeux de ce débat en présentant les résultats de la littérature économétrique qui évalue l'effet de ces politiques et en comparant ces résultats avec les principaux enseignements des études non économétriques. Les résultats montrent que les politiques d'innovation et les politiques de diffusion ont un impact positif sur les ENR et confirment en cela les études non économétriques. Ils font toutefois apparaitre des effets différenciés selon la nature des politiques (politiques prix versus politiques quantités) et la maturité des technologies.