What’s With the Home Underdogs in the N.F.L.?

Freakonomics author Steven D. Levitt looks at this weekend’s NFL games and concludes:

Home underdogs are of particular interest right now because, remarkably, in all four playoff games this weekend, the home team is the underdog. If I were a betting man (or more accurately, if I had an account I could bet on), I would be hammering the home underdogs this weekend.

Click the link to read Levitt’s reasoning.