Long Depression
Nobel laureate economist Milton Friedman, author of "A Monetary History of the United States", on the other hand, blamed this prolonged economic crisis on the imposition of a new gold standard, part of which he referred to by its traditional name, The Crime of 1873. This forced shift into a currency whose supply was limited by nature, unable to expand with demand, caused a series of economic and monetary contractions that plagued the entire period of the Long Depression. Murray Rothbard, in his book "History of Money and Banking of the United States", argues that the long depression was only a misunderstood recession since real wages and production were actually increasing throughout the period. Like Friedman, he attributes falling prices to the resumption of a deflationary gold standard in the U.S. after the Civil War.
Wall Street Crash of 1929
The 1929 crash brought the Roaring Twenties to a halt. As tentatively expressed by economic historian Charles P. Kindleberger, in 1929, there was no lender of last resort effectively present, which, if it had existed and been properly exercised, would have been key in shortening the business slowdown that normally follows financial crises. The crash instigated widespread and long-lasting consequences for the United States. Historians still debate whether or not the 1929 crash sparked the Great Depression or if it merely coincided with the bursting of a loose credit-inspired economic bubble. Only 16% of American households were invested in the stock market within the United States during the period leading up to this depression, suggesting that the crash carried somewhat less of a weight in causing it.
However, the psychological effects of the crash reverberated across the nation as businesses became aware of the difficulties in securing capital market investments for new projects and expansions. Business uncertainty naturally affects job security for employees, and as the American worker (the consumer) faced uncertainty with regards to income, naturally the propensity to consume declined. The decline in stock prices caused bankruptcies and severe macroeconomic difficulties, including contraction of credit, business closures, firing of workers, bank failures, decline of the money supply, and other economically depressing events.