Causes of the Great Depression
Second, there are the monetarists, who believe that the Great Depression started as an ordinary recession, but that significant policy mistakes by monetary authorities (especially the Federal Reserve) caused a shrinking of the money supply which greatly exacerbated the economic situation, causing a recession to descend into the Great Depression. Related to this explanation are those who point to debt deflation causing those who borrow to owe ever more in real terms.
Causes of the Great Depression
Friedrich Hayek had criticised the FED and the Bank of England in the 1930s for not taking a more contractionary stance. However, in 1975, Hayek admitted that he made a mistake in the 1930s in not opposing the Central Bank's deflationary policy and stated the reason why he had been ambivalent: "At that time I believed that a process of deflation of some short duration might break the rigidity of wages which I thought was incompatible with a functioning economy. In 1978, he made it clear that he agreed with the point of view of the Monetarists, saying, "I agree with Milton Friedman that once the Crash had occurred, the Federal Reserve System pursued a silly deflationary policy", and that he was as opposed to deflation as he was to inflation. Concordantly, economist Lawrence White argues that the business cycle theory of Hayek is inconsistent with a monetary policy which permits a severe contraction of the money supply.