One study by Mr. Kleiner and Rubert T. Kudrle of the University of Minnesota suggests that tighter licensing of dentists does not improve the quality of dental health. It does reduce the number of dentists. Crucially, it improves their earnings.
The issue goes beyond teeth. Associations for osteopaths have come out in support of North Carolina’s dental board; so have anesthesiologists, midwives, optometrists and even engineers and surveyors.
Supporting the dental board are the International Conference of Funeral Service Examining Boards, the National Association of State Boards of Accountancy, the Federation of State Massage Therapy Boards and the American Association of Veterinary State Boards.
For them, as for the taxi drivers battling Uber, the most important issue is whether they can maintain a lock on their professions and legally keep competition at bay. But is that a legitimate reason for the public to bear the cost of such cartels?