Joel Waldfogel talked about his book Scroogenomics: Why You Shouldn't Buy Presents for the Holidays (Princeton University Press; October 25, 2009). In his book he argues that Americans end up wasting billions of dollars on presents during the holiday season every year. He says that the worth attached to these gifts by those who receive them is generally considerably less than what the gift-giver spends on them. Professor Waldfogel illustrated his talk with slides. He responded to questions from members of the audience at the University of Pennsylvania Bookstore in Philadelphia at 6:00 p.m. on Tuesday November 17, 2009.