The attention paid by economic sociology to activities aimed at controlling the market reminds us that the social aspects of the economy include not only market organizations and institutions, but also some activities that are focused on economic exchanges more directly. We propose the notion of “market professionals” to account for the people (recruitment experts, consumer activists, distributors, etc.), the occupations (marketing, design, packaging, etc.) and devices (press, consumer guides, standards, etc.) whose task is “to work on the market”, i.e. to construct it, move it, organize it, manage and control it – in short, “agencing” transactions (Çalıșkan and Callon, 2010; Cochoy, 2013; Dubuisson-Quellier, 2010). [Premier paragraphe]