After local newspapers close, political polarization among voters increases, according to new research in the Journal of Communication, Journalist's Resource reports.

"The researchers attribute the increasing political polarization not to the loss of information resulting from local newspaper closures but rather to the substitution of national news in its stead," the article said.

Elsewhere, research suggests that corporations pollute more when there aren't local papers to hold them accountable, Pacific Standard reports, citing a paper by an assistant professor of economics at the Stockholm School of Economics.

And finally, "Hidden Brain" host Shankar Vedantam on NPR talks to researchers who suggest that newspaper closures might affect the cost of borrowing by local governments.