I would say the Great Depression started on a rolling basis somewhere in the late 1920s. Some sectors of the economy were suffering before the 1929 crash. If you want to ignore 1920, then why not look at the deflation having started at the second peak in 1926 and lasting 8 years or so. The first 3 or 4 years were mild and the last 3 or 4 years were severe.vincecate wrote:Are you under the impression that The Great Depression started in 1920? People think of deflation and depression going together, but my point is it was only the first 3 years of the decade, not the whole decade. It ended when they went off the 40% gold standard and could print money freely. I know of no case where a country with a pure fiat currency had a 30% price drop like those first 3 years of the Great Depression. Do you?
Deflation and depression are two different things, although one can affect the other. The original question I thought was how long deflation has typically lasted historically. My best answer would be 20 years plus or minus a few years.
First, a few months back, you asked if there was ever a deflation when a country was not on a gold standard. My answer was yes, that the Bank of England web site showed a severe deflation in the early 1800s when England was not on a gold standard. Other data sources were used to confirm that.
The question you're asking now is whether a severe deflation has occurred where a country had a pure fiat currency. The US doesn't have a pure fiat currency now. A pure fiat currency is where there is no credit market and the only means for payment that exists is a paper currency that has no backing. When a country is not credit worthy, that says something about the condition that country finds itself in, which goes hand in hand with worthless money if the country is not moving in the direction of making itself credit worthy, which is rare.
The amount of paper money in circulation in the US has virtually nothing to do with inflation. An increase in paper money in circulation in the US could even point to deflation, depending on how it comes about. On the other hand, in a pure fiat regime, an increase of paper money in circulation would always be inflationary.