Long Depression
In the United States, economists typically refer to the Long Depression as the Depression of 1873–1879, kicked off by the Panic of 1873, and followed by the Panic of 1893, book-ending the entire period of the wider Long Depression. The National Bureau of Economic Research dates the contraction following the panic as lasting from October 1873 to March 1879. At 65 months, it is the longest-lasting contraction identified by the NBER, eclipsing the Great Depression's 43 months of contraction. In the United States, from 1873 to 1879, 18,000 businesses went bankrupt, including 89 railroads. Ten states and hundreds of banks went bankrupt. Unemployment peaked in 1878, long after the initial financial panic of 1873 had ended. Different sources peg the peak U.S. unemployment rate anywhere from 8.25% to 14%.
Great Depression
Between 1933 and 1939, federal expenditure tripled, and Roosevelt's critics charged that he was turning America into a socialist state. The Great Depression was a main factor in the implementation of social democracy and planned economies in European countries after World War II (see Marshall Plan). Keynesianism generally remained the most influential economic school in the United States and in parts of Europe until the periods between the 1970s and the 1980s, when Milton Friedman and other neoliberal economists formulated and propagated the newly created theories of neoliberalism and incorporated them into the Chicago School of Economics as an alternative approach to the study of economics. Neoliberalism went on to challenge the dominance of the Keynesian school of Economics in the mainstream academia and policy-making in the United States, having reached its peak in popularity in the election of the presidency of Ronald Reagan in the United States, and Margaret Thatcher in the United Kingdom.