Deflation
Deflation occurred periodically in the U.S. during the 19th century (the most important exception was during the Civil War). This deflation was at times caused by technological progress that created significant economic growth, but at other times it was triggered by financial crises — notably the Panic of 1837 which caused deflation through 1844, and the Panic of 1873 which triggered the Long Depression that lasted until 1879. These deflationary periods preceded the establishment of the U.S. Federal Reserve System and its active management of monetary matters. Episodes of deflation have been rare and brief since the Federal Reserve was created (a notable exception being the Great Depression) while U.S. economic progress has been unprecedented.
Great Depression in the United States
There is little agreement on what caused the Great Depression, and the topic has become highly politicized. At the time the great majority of economists around the world recommended the "orthodox" solution of cutting government spending and raising taxes. However, British economist John Maynard Keynes advocated large-scale government deficit spending to make up for the failure of private investment. No major nation adopted his policies in the 1930s.The stock market crash in the 1929 not only affected the business community and the public's economic confidence, but also it led to the banking system soon after the turmoil. The boom of the US economy in the 1920s was based on high indebtedness, and the rupture of the debt chain caused by the collapse of the bank had produced widespread and far-reaching adverse effects. It is precisely because of the shaky banking system, the United States was using monetary policy to save the economy that had been severely constrained. The American economist Kindleberger of long-term studying of the Great Depression pointed out that in the 1929, before and after the collapse of the stock market, the Fed lowered interest rates, tried to expand the money supply and eased the financial market tensions for several times, however they were not successful, the fundamental reason was that the relationship between various credit institutions and the community was in a drastic adjustment process, the normal supply channels for money supply were blocked. Later, some economists argued that the Fed should do a large-scale opening market business at that time, but the essence of the statement was that the US government should be quick to implement measures to expand fiscal spending and fiscal deficits, whereas, the essence of this argument was that the US government should be promptly implemented to expand the fiscal spending and the fiscal deficits measures.