Pregnant with meaning: The Colbert bump

From a forthcoming article by James Fowler in PS: Political Science and Politics: "Stephen Colbert, the host of Comedy Central’s The Colbert Report, claims that politicians who appear on his show will become more popular and are more likely to win elections. Although online discussions cite anecdotal evidence in support of his claim, it has never been scrutinized scientifically. In this article I use 'facts' (sorry, Stephen) provided by the Federal Election Commission to create a matched control group of candidates who have never appeared on The Colbert Report. I then compare the personal campaign donations they receive to those received by candidates who have appeared on the program’s segment 'Better Know a District.' The results show that Democratic candidates who appear on the Report receive a statistically significant “Colbert bump” in campaign donations, raising 44% more money in a 30-day period after appearing on the show. However, there is no evidence of a similar boost for Republicans. These results constitute the first scientific evidence of Stephen Colbert’s influence on political campaigns."