Our latest Freakonomics Radio episode is called "How Do We Know What Really Works in Healthcare?" (You can subscribe to the podcast at iTunes or elsewhere, get the RSS feed, or listen via the media player above. You can also read the transcript, which includes credits for the music you’ll hear in the episode.) The gist of the episode: a lot of the conventional wisdom in medicine is nothing more than hunch or wishful thinking. A new breed of data detectives is hoping to change that.