“The propagation problem is the problem of explaining by the structural properties of the swinging system what the character of the swings would be in case the system was started in some initial situation”

—  Ragnar Frisch , Propagation problems and impulse problems in dynamic economics

Source: 1930s, Propagation problems and impulse problems in dynamic economics, 1933, p. 1

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Ragnar Frisch 26
Norwegian economist 1895–1973

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