The authors of the book, Freakonomics, created some controversy when they laid out the case that the legalization of abortion in the United States in the 1970s was largely responsible for the dramatic drop in crime in the 1990s and beyond. In this podcast, the main author and economist behind the study discusses the fallout and criticism from that case but more importantly discusses several important concepts related to the human sciences and how people acquire knowledge generally.
Some interesting moments:
33 minutes: the challenges for a layperson to learn about social science research and the limitations of media reporting and sensationalism. Also talks about the nature of creating knowledge in economics.
47 minutes: on the challenges of explaining to people what economists do and the validity of their methods despite seeming sophisticated to the nonexpert.