Three facts about the ads swing-state voters are seeing right now:

1) "Obama and allies aired about 5,000 more television ads than Romney and allies last week."

2) "Each pro-Obama ad has cost an average of $502 dollars.  But each pro-Romney ad has cost an average of $630."

3) " The consulting firm Evolving Strategies recently completed a large randomized experiment in which participants saw pro-Romney ads, pro-Obama ads, both, or neither.  On the whole, the Obama ads were more effective in persuading weak partisans and undecided voters—even when the Romney ads were shown alongside.  Their effect was particularly notable among women."

More -- including graphs -- here:

http://www.washingtonpost.com/blogs/ezra-klein/wp/2012/10/18/the-air-war-team-obama-aired-about-5000-more-ads-than-team-romney-last-week/
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