New edition with an introduction by Roger Garrison and an index. Booms and busts are t endemic to the free market, argues the Austrian theory of the business cycle, but come about through manipulation of money and credit by central banks. In this mograph, Austrian giants explain and defend the theory against alternatives. Includes essays by Mises, Rothbard, Haberler, and Hayek. In his later years, Professor Haberler distributed many of these mographs to friends and associates.