From the "comments":https://themonkeycage.org/2010/12/bleg_what_difference_did_citiz.html#comment-51265 on my "previous post":https://themonkeycage.org/2010/12/bleg_what_difference_did_citiz.html, here is Norm
Following quickly on my "earlier post":https://themonkeycage.org/2010/09/tracking_political_ads_in_2010.html comes "the first data":http://election-ad.research.wesleyan.edu/2010/09/27/over-219m-spent-on-advertising-in-us-senate-and-us-house-races-since-jan-1/