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Rh by the culture collections, and 27% from research laboratories in academia and hospitals who principally do their own collecting), the dominance of public sector transactions (77% to entities that are largely public) and the importance of reciprocity amongst collections (16% of new material comes from other public culture collections and 9% of existing material goes to other public culture collections).

A socio-technical actor network is built around these transactions, which connect the main actors to the various user groups and ensures their influence. The quantitative survey already shows some of the direct mechanisms of influence of the main actors, mainly by mechanisms of direct reciprocity between collections and researchers. Not only do the collections help each other to complete the gaps in their own reference holdings, but they also allow other collections to further redistribute strains that they provide to them, insofar as the other collection has the capacity and the intent to do so. The influence of the industry appears clearly as an important client of the culture collections’ strains.

Even if the industry client is not the most important recipient of the strain holdings, it is a vital one, because it provides a complementary income