Occupational licensing: trendy new way to shoot ourselves in the foot
Morris Kleiner has done the "lion share" of empirical work on occupational licensing.
While this is just emerging as a public policy issue of the first order, the economic literature on occupational licensing has been conclusive for a long time, the lion share of the empirical work having been done by Morris Kleiner. He published an excellent summary of his work in the Fall 2000 issue of the Journal of Economic Perspectives. Six years later he published a more comprehensive summery in the book Licensing Occupations: Ensuring Quality or Restricting Competition?