He provides much evidence that the balance of occupational licensing has shifted away from protecting consumers and toward limiting the supply of workers in various professions. A result is that services provided by licensed workers are more expensive than necessary and that quality is not noticeably affected.
...Although the exact number of workers in jobs that require a license is not available, Professor Kleiner conservatively estimates that 20 percent of workers in 2000 were in an occupation that was covered by a state licensing requirement, up from 5 percent in the 1950's.
Since I have an interest in health care economics, my pet peeve in this area is physical therapists. In Maryland, we are headed toward requiring PT's to obtain what amounts to a doctorate, even though they already are scarce.
If one were trying to improve health care, would the requirements for being a physical therapist be stricter or more flexible than what they have been?