Who's more negative?

It's a draw. This from the University of Wisconsin Advertising Project:

Prof. Ken Goldstein, director of the Wisconsin Advertising Project, issued the following statement:

“Analysis from the Wisconsin Advertising Project of Sen. John McCain’s television advertising for the week of September 28 to October 4 shows, in fact, that all McCain campaign TV advertising did have significant negative content - either spots that were comprised completely of attacks on the Democratic nominee or ones that combined attacks on Sen. Barack Obama with some talk about Sen. McCain’s own plans. We reported this finding in a press release last week that was widely publicized and this was clearly the number that Obama was citing in last night’s debate. That said, McCain’s advertising has not been completely negative over the course of the entire campaign. Looking at the tone of all of McCain’s advertising from June 4 to October 4, we found that 47 percent of the McCain spots were negative (completely focused on Obama), 26 percent were positive (completely focusing on his own personal story or on his issues or proposals) and 27 percent were contrast ads (a mix of positive and negative messages).

But what about Obama? Our analysis reveals that 39 percent of all general election Obama TV ads have been positive (solely about his record, positions or personal story), 35 percent have been negative (solely focused on McCain) and 25 percent have been contrast ads - mixing a bit of both. So, on a proportional basis, the McCain campaign is and has been more negative than Obama.

But, Obama has aired over 50,000 more ads than McCain. So, hasn’t he simply aired more of everything - including negative ads - than McCain has this year, or than anyone in history, as McCain may have alleged?

If one just looks at pure airings of negative ads, McCain has aired more than Obama. If one allocates contrast ads as half positive and half negative or considers contrast ads as negative - as the Advertising Project does - the tone of the McCain and Obama campaigns has been absolutely identical.