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
In a 1995 survey of American economic historians, two-thirds agreed that the Smoot-Hawley tariff act at least worsened the Great Depression. However, many economists believe that the Smoot-Hawley tariff act was not a major contributor to the great depression. Economist Paul Krugman holds that, "Where protectionism really mattered was in preventing a recovery in trade when production recovered". He cites a report by Barry Eichengreen and Douglas Irwin: Figure 1 in that report shows trade and production dropping together from 1929 to 1932, but production increasing faster than trade from 1932 to 1937. The authors argue that adherence to the gold standard forced many countries to resort to tariffs, when instead they should have devalued their currencies. Peter Temin argues that contrary the popular argument, the contractionary effect of the tariff was small. He notes that exports were 7 percent of GNP in 1929, they fell by 1.5 percent of 1929 GNP in the next two years and the fall was offset by the increase in domestic demand from tariff.