The latest EconTalk features Gary Greenberg, who espouses a view much like the psychiatrist Thomas Szasz. The basic premise is that there are large incentives for doctors and psychologists to label things as diseases, although there is a surprising lack of clinical evidence that can test for these diseases.

I just ordered two books on this topic: The Myth of Mental Illness and Romancing Opiates. A free, yet excellent alternative to these books is, of course, Brain Caplan’s essay on the topic.