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.
Great Depression
According to this view, the root cause of the Great Depression was a global over-investment in heavy industry capacity compared to wages and earnings from independent businesses, such as farms. The proposed solution was for the government to pump money into the consumers' pockets. That is, it must redistribute purchasing power, maintaining the industrial base, and re-inflating prices and wages to force as much of the inflationary increase in purchasing power into consumer spending. The economy was overbuilt, and new factories were not needed. Foster and Catchings recommended federal and state governments to start large construction projects, a program followed by Hoover and Roosevelt.