Yes, there is a study of what happens when a lawmaker appears on “The Colbert Report” segment “Better Know a District.”
James H. Fowler, associate professor at University of California at San Diego, found that Democrats who appear on the Colbert segment saw a 44% bump in campaign contributions in the month following their show. Republicans, however, saw no bump.
Fowler surmises that, based on the show’s exposure, Colbert himself could have reaped about $12 million in campaign contributions had his candidacy for presidency been allowed to go forward. It was aborted in South Carolina when Democratic state party officials refused to allow his name on the ballot.
(Via the Daily Dish.)