I came across a book that the late Objectivist writer Burgess Laughlin wrote in 1978: Job Opportunities in the Black Market and found it very interesting. It is sort of a proto-Freakonomics type of book.
The book is basically a deep exploration (with organization charts and balance sheets) of black market businesses such as prostitution, drug smuggling, gypsy cab companies, abortion providers (pre Roe v. Wade), etc. It has a lot of interesting information and really shows how victimless crime laws completely make possible such black markets.
One vivid example is of a store selling a candy bar on Sunday and being charged with violating a Sunday sales law.
