Art Market Data—Including Catalogues Raisonnés—Just Took a Big Leap Forward

Not too long ago, it was possible to attend a prestigious art fair in a global capital where you might find two very similar works of art featured at the booths of two different dealers who might have placed wildly different asking prices on the works. How wild? Try a million dollars difference—or one work priced at twice its near twin. 
That wasn’t supposed to happen in a world where the art market had supposedly achieved some form of price transparency. Although auction price