Steven Levitt of Freakonomics fame has published a blog entry showing that people can make lots of money betting on home underdogs in the NFL. This is because bettors disproportionately favor road favorites, leading the house to adjust its odds accordingly. Levitt previous wrote an academic paper on the subject. Home underdogs are 47-30 against the spread this season, he writes. Levitt said he entered a handicapping contest this season and he currently ranks tied for seventh out of 800 entrants by picking home underdogs. The Seahawks were 4.5-point home underdogs last week. They lost, 20-17.