title: Free article for sale: 11,000 US dollars--what is free public access worth?
authors.forename: Neil Blair
authors.initials: NB
authors.lastname: Christensen
mesh_terms: D022126:Access to Information; D002017:Budgets; D003362:Cost-Benefit Analysis; D006801:Humans; D020407:Internet / Q000639:trends; D009316:National Institutes of Health (U.S.); D009317:National Library of Medicine (U.S.); D010506:Periodicals as Topic / Q000191:economics* / Q000600:supply & distribution / Q000639:trends*; D011643:Publishing / Q000191:economics* / Q000639:trends*; D014481:United States