Economist and author Anja Shortland of King's College London talks about her new book, Lost Art, with EconTalk host Russ Roberts. When a famous painting disappears into the underworld of stolen art, how does it make its way back into the legitimate world of auction houses and museums? Drawing on the archives of a private database of stolen objects--the Art Loss Register--Shortland discusses the economics of the art world when objects up for sale may be the result of theft.