John Forbes Nash, Jr., a mathematician, won the Nobel Prize for Economics in 1994. His work on n-person game theory challenged earlier work by von Neumann and Morgenstern as well as that by Adam Smith. Smith's understanding of supply and demand, with distribution of goods governed by the "invisible hand" of market forces, had governed economic theory since the eighteenth century. Nash has contributed significantly to the New Economy with work which creates another bridge from mathematics to economics. Nash was the subject of a recent biography and of a movie both titled A Beautiful Mind.