Released the day after WSJ managing editor Marcus Brauchli resigned, the study found that the 119-year-old paper upped its front-page politics coverage to 18% of the news hole, up from 5%, from December 13, 2007, to March 13, 2008.
The study showed that during the same period, the paper decreased its front-page business coverage from 30% to 14%.
Robert Christie, Dow Jones & Co. VP of communications, said, via e-mail, that an unusually long Democratic presidential primary season is one reason for the expanded political coverage.
"Since the acquisition of Dow Jones by News Corp., the focus of the [WSJ] has been to expand our political and international coverage while remaining the preeminent provider of business news," he added.
Mark Jurkowitz, associate director for the PEJ and the study's author, said News Corp. chairman Rupert Murdoch is likely broadening WSJ's coverage to compete with The New York Times.