Our latest Freakonomics Radio episode is called “How Many Doctors Does It Take to Start a Healthcare Revolution?" (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: The practice of medicine has been subsumed by the business of medicine. This is great news for healthcare shareholders -- and bad news for pretty much everyone else.