The Truth Behind Art Nomenclature

Because of the large auction houses (e.g. Sotheby's, etc.), the art world has largely accepted certain relatively new words to how artwork (and its authenticity) is described to potential bidders / buyers.  The use of the term "attributed to," "Circle of," "Follower of," "Manner of," and so forth are now used systematically by auction houses. 

Willem De Kooning Pricing

Recent Auction Prices for Willem De Kooning Paintings.