Not exact matches
In the third quarter of 2011, 41 U.S.
papers brought in
paywall models, according the Newspaper Association of America.
To explore this matter further, a recent
paper in Nature Geoscience (
paywalled) by Andrew MacDougall, Christopher Avis and Andrew Weaver couples together climate and carbon - cycle
models.
Earlier this month, Gannett announced it would begin testing
paywalls at a number of its
papers as it seeks to find a
model that can benefit all its properties.