[1][2][3][4][5][6] Rankings rely on subjective impressions by the scholarly community, on analyses of prize winners of scientific associations, discipline, a publisher's reputation, and its impact factor (particularly in the sciences).
According to the manifesto, "Science and technology indicators are prone to conceptual ambiguity and uncertainty and require strong assumptions that are not universally accepted.
[4] According to Colin Steele, a librarian at the Australian National Library in Canberra, "Listings of publishers by title also fail to take into account that some university presses are strong in certain disciplines, but not across the whole spectrum.
The Australian Political Studies Association (APSA) ranked academic publishers in 2007, taking into consideration both book and journal publication.
[15] The results were: To quantitatively assess the output of a publishing company, in 2014 a research group associated with the University of Granada created a methodology based on the Thomson-Reuters Book Citation Index.
According to the Granada study, the 10 leading companies were:[16] The Research Impact Measurement Service (RIMS) at the University of New South Wales presented a quantitative methodology of bibliometric comparisons of book publishers.