The full text article (preprint) linked to below was recently posted by Quantitative Science Studies (from MIT Press).
Title
The Pricing of Open Access Journals: Diverse Niches and Sources Of Value In Academic Publishing
Authors
Kyle Siler
University of Sussex
Koen Frenken
Utrecht University
Source
Quantitative Science Studies
DOI: 10.1162/qss_a_00016
Abstract
32 pages; PDF.