Milton Friedman after examining the history of business cycles in the United States wrote that there "appears to be no systematic connection between the size of an expansion and of the succeeding contraction", and that further analysis could cast doubt on business cycle theories which rely on this premise. 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".