I generally enjoy The Economist’s blog, but I think they’ve taken their free-market philosophy a little far with their post on the “de facto monopoly of the American Medical Association in the distribution of licences to practice medicine.” Their claim is that the AMA extracts large rents from their monopoly and unfairly prevents other from practicing medicine. I don’t know what sort of rents doctors get from their education so I can’t comment on that. A more interesting question is whether it would be efficient to allow a deregulated market in medical practice.
Every time you go to the doctor you are, effectively, contracting for medical services. A well-known problem in contracting theory is lack of verifiability. The problem is that it is very costly to you to find out whether the doctor is providing you with high quality medical services. If you are not yourself trained as a doctor then you have to seek the opinion of someone who is in order to verify the quality of service you received. Even then, there is a question mark over the third party’s credibility: they may want to either protect the reputation of medical practitioners or, alternatively, destroy the reputation of competitors. Even the knowledge that you recovered from illness is not enough since this is a very noisy signal of medical quality. Without specialist knowledge it is impossible to know what the outcome would have been in the absence of treatment. The suggestion that consumers ought to have “choices over traditions of training and styles of care” suffers from the same problem. In the absence of highly specialised knowledge there is no way for consumers to verify the quality of each style of care.
There are two possible remedies to the problem of verifiability: information and regulation. Consumers can be informed by the AMA about the choices they face in a deregulated market or the market can be regulated. Unfortunately, it is simply not possible to become an expert on medical care by reading a couple of pamphlets. Placing the burden on consumers to choose wisely is unlikely to result in an efficient health care outcome. By contrast, regulation puts the burden of choice on experts in the field for whom it is far less costly to evaluate performance. It is quite possible that the rents that the AMA extracts from consumers are far lower than the costs to society of deregulation.