>I wonder how the medical and legal industries do it.
Do they actually do it with any success? According to this article: http://www.forbes.com/sites/leahbinder/2013/09/23/stunning-n..., medical errors represent the third leading cause of death in the United States. Medical licensing makes it hard to enter the industry, but it doesn't seem to do much good of forcing dangerously incompetent practitioners out of the industry.
As many high payin regulated jobs, thise inside have connections which let them 'recommend' and 'ease' the entrance of close, selcted friend/family in the field.
Then you get dynasties and as much as we pretend regulation to be meaningful when they rot in such way the licenses just become 'favor money' and the whole category starts smelling
Legal licensing does not keep incompetent practitioners from entering the industry, at least in the U.S. This is cultural - there is still an expectation that after you get your license, other lawyers will train you.
Do they actually do it with any success? According to this article: http://www.forbes.com/sites/leahbinder/2013/09/23/stunning-n..., medical errors represent the third leading cause of death in the United States. Medical licensing makes it hard to enter the industry, but it doesn't seem to do much good of forcing dangerously incompetent practitioners out of the industry.