Oskar Morgenstern (January 24, 1902 - July 26, 1977) was a German-born American economist. He applied the game theory to business. He also co-wrote Theory of Games and Economic Behavior in 1944 with John von Neumann. He has a book "On the accuracy of economic observations". He was born in Görlitz, Germany and died in Princeton, New Jersey, the United States.