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.
Causes of the Great Depression
More recent research, by economists such as Temin, Ben Bernanke, and Barry Eichengreen, has focused on the constraints policy makers were under at the time of the Depression. In this view, the constraints of the inter-war gold standard magnified the initial economic shock and were a significant obstacle to any actions that would ameliorate the growing Depression. According to them, the initial destabilizing shock may have originated with the Wall Street Crash of 1929 in the U.S., but it was the gold standard system that transmitted the problem to the rest of the world.