The Ehrenberg Bass Institute has quantitative marketing/advertising/brand results going back to the 50s. If you're interested in the math, I recommend checking

The Ehrenberg Bass Institute has quantitative marketing/advertising/brand results going back to the 50s. If you're interested in the math, I recommend checking out How Brands Grow by EBI director, Byron Sharp. [1] http://www.marketingscience.info http://www.marketingscience.info [2] http://www.amazon.com/How-Brands-Grow-What-Marketers/dp/0195573560 http://www.amazon.com/How-Brands-Grow-What-Marketers/dp/0195...