Lawrence H. White describes the economic theories that arose to explain the US economy during the 1920s and the crash of 1929. White's current book project, The Clash of Economic Ideas, explores the history of economic theory and how these ideas continue to shape policy debates today. In this talk, he describes the 1929 financial crash in the United States, emphasizing the contrasting views held by economists Friedrich A. Hayek, John Maynard Keynes, and Milton Friedman. During the presentation, White also examines the economists' views on prices and production, savings and investment, monetary expansion, and the use of the gold standard.