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Naming

The term "The Great Depression" is most frequently attributed to British economist Lionel Robbins, whose 1934 book The Great Depression is credited with formalizing the phrase, though Hoover is widely credited with popularizing the term, informally referring to the downturn as a depression, with such uses as "Economic depression cannot be cured by legislative action or executive pronouncement" (December 1930, Message to Congress), and "I need not recount to you that the world is passing through a great depression" (1931).

The term " depression " to refer to an economic downturn dates to the 19th century, when it was used by varied Americans and British politicians and economists. The first major American economic crisis, the Panic of 1819, was described by then-president James Monroe as "a depression", and the most recent economic crisis, the Depression of 1920–21, had been referred to as a "depression" by then-president Calvin Coolidge.

Financial crises were traditionally referred to as "panics", most recently the major Panic of 1907, and the minor Panic of 1910–11, though the 1929 crisis was called "The Crash", and the term "panic" has since fallen out of use. At the time of the Great Depression, the term "The Great Depression" was already used to refer to the period 1873–96 (in the United Kingdom), or more narrowly 1873–79 (in the United States), which has retroactively been renamed the Long Depression.