https://en.wikipedia.org/wiki/Oligopsony https://en.wikipedia.org/wiki/Oligopsony In U.S. publishing, five publishers known as the Big Five account for about t

https://en.wikipedia.org/wiki/Oligopsony https://en.wikipedia.org/wiki/Oligopsony In U.S. publishing, five publishers known as the Big Five account for about two-thirds of books published.[1] ... Thus authors have fewer truly independent outlets for their work. This simultaneously depresses advances paid to authors and creates pressure for authors to cater to the tastes of the publishers in order to ensure publication, reducing viewpoint diversity.