, June 00, 0000, preprint. "[E]ach article can be found at only one journal of one publisher exclusively. Hence, due to this lack of competition, subscription pricing need not be coupled to publication costs...The APC-OA 'market'...suffers from analogous non-substitutability problems as the subscription market, leading to market failure and hyper-inflation also there [citations]....It is therefore straightforward to hypothesize that any policy that fails to address the non-substitutability problem in scholarly communication will also fail to solve the affordability problem." 