Thanks, I'll definitely look into Freakonomics. I agree it's pretty hard to find info on this topic from an academic perspective, and it's really unfortunate, as I believe it is important for the wider public to understand these tactics and why they work.
The book "Predictably Irrational" by behavioral economist Dan Ariely that was mentioned early on in the article is also a good read. It does not directly related to pricing strategy but provide good insight to the irrational decisions that we make, and the BOGO falls into that category.
In a similar vein, I have just finished "Nudge: Improving Decisions About Health, Wealth, and Happiness" by Thaler and Sustein. This might be worth a look as well.
