The Austrian School is not considered mainstream and was generally discredited in the '30s. I prefer practical systems and not theoretical ones: Milton Friedman objected to the policy implications of the theory, stating the following in a 1998 interview: I think the Austrian business-cycle theory has done the world a great deal of harm. If you go back to the 1930s, which is a key point, here you had the Austrians sitting in London, Hayek and Lionel Robbins, and saying you just have to let the bottom drop out of the world. You've just got to let it cure itself. You can't do anything about it. You will only make it worse. You have Rothbard saying it was a great mistake not to let the whole banking system collapse. I think by encouraging that kind of do-nothing policy both in Britain and in the United States, they did harm. In 1969, Milton Friedman, after examining the history of business cycles in the U.S., concluded that "The Hayek-Mises explanation of the business cycle is contradicted by the evidence. It is, I believe, false." He analyzed the issue using newer data in 1993, and again reached the same conclusion. Referring to Friedman's discussion of the business cycle, Austrian economist Roger Garrison argued that Friedman's empirical findings are "broadly consistent with both Monetarist and Austrian views", and goes on to argue that although Friedman's model "describes the economy's performance at the highest level of aggregation, Austrian theory offers an insightful account of the market process that might underlie those aggregates".