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This blog is part of a vast research program on the political economy of scientific publication, which has been strongly transformed over the last twenty years by the electronic dissemination of journals. It considers publishers, editorial committees and journals as socio-political actors to be studied in three complementary aspects detailed below. Firstly, they are analysed as economic actors defining publishing markets. The conditions under which these markets were created have been the subject of much criticism, and strong transnational mobilisations around open access have been deployed, which has influenced the construction of public policies that are contrasted internationally. New economic models have emerged, of which direct payment by the authors  (APC), is only the most visible, but not the most frequent. The multiplication of coloured labels (Green, Gold, Platinum, Bronze, Diamond) to designate these models does not fully account for their subtle differences, nor for the sustainability of the associated business model, compared to the classic subscription model which has led to a "serial crisis" over the last 20 years, with the massive increase in the cost of access to publications for librariesSecondly, journals and publishers are studied as places of production, including innovations in evaluation technologies (open peer review, technical soundness based review…). In particular, it is the growing debate on post-publication peer review policies, including withdrawing articles, that will be examined, as well as the emergence of platforms for public discussion of their validity  such as PubPeer.  The question of the centrality of journals for peer review or their marginalization (overlay journals, recommendations…) will also be addressed.Thirdly, journals are treated as places of valorisation, seeking to attract authors and promote their position through the use of different measures (citation, referencing, uses…), which they highlight or criticise. In addition to the recurring debates on the Journal Impact Factor, a measure that is currently much decried, there will be discussions on alternative metrics, or even on responsible metrics, which are supposed to better represent academic production and its uses. These three aspects aim in particular at sheding light on new forms of self-regulation by academic actors (systematisation of advertising for the withdrawal of articles, generalisation of post-publication peer review, stigmatisation of predatory publishers, uses of creative commons licenses…), the innovative and argumentative work of publishers and platforms, whether public, para-public or private, and the redefinition of public policies in the field of academic publication.