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 in France
The Great Depression affected France from about 1931 through the remainder of the decade. The crisis affected France a bit later than other countries, hitting around 1931. While the 1920s grew at the very strong rate of 4.43% per year, the 1930s rate fell to only 0.63%. The depression was relatively mild: unemployment peaked under 5%, the fall in production was at most 20% below the 1929 output; there was no banking crisis. The depression had some effects on the local economy, which can partly explain the 6 February 1934 crisis and even more the formation of the Popular Front, led by SFIO socialist leader Léon Blum, who won the election of 1936.