“But further analysis and experience soon raised doubts about the efficacy of these new tools. Empirical research indicated that the Keynesian multiplier was much smaller than earlier analyses had assumed, reduced by a crowding out of interest-sensitive spending caused by an induced increase in the demand for money and by the effect of the larger national debt on long-term interest rates. The leakage of demand through imports and the effect of the fiscal expansion on the exchange rate further reduced the multiplier.”
"Rethinking the Role of Fiscal Policy" (2009).
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Martin Feldstein 9
American economist 1939–2019Related quotes
Source: Open economy macroeconomics, 1980, p. 154-157; as cited by Partha Sen. Fiscal policy, the exchange rate and the current account : a re-examination. ; About the Mundell-Fleming model

Speech to the Federation of Conservative Students in Manchester (6 October 1981), quoted in The Times (7 October 1981), p. 6.
Post-Prime Ministerial

Source: Economics (4th ed., 2015), Chapter 33. Macroeconomics: Events and Ideas

Ralph George Hawtrey, quoted in Irving Fisher, The Theory of Interest (1930), Chapter 19. The Relation of Interest to Money and Prices