NATIONAL BUREAU OF ECONOMIC RESEARCH
NATIONAL BUREAU OF ECONOMIC RESEARCH

'Risky Habits' and the Marginal Propensity to Consume Out of Permanent Income, or, How Much Would a Permanent Tax Cut Boost Japanese Consumption?

Christopher D. Carroll

NBER Working Paper No. 7839
Issued in August 2000
NBER Program(s):   ME   PE

Papers in variety of disparate literatures have recently suggested that habit formation in consumption may explain several empirical puzzles, ranging from the level and cyclical variability of the equity premium (Abel (1990,1999); Constantinides (1990); Jermann (1998); Campbell and Cochrane (1999)) to the excess smoothness' of aggregate consumption (Fuhrer (2000)) to the apparent fact that increases in economic growth cause subsequent increases in aggregate saving rates (Carroll and Weil (1994); Bosworth (1993); Attanasio, Picci, and Scorcu (2000); Rodrik (1999); Loayza, Schmidt-Hebbel, and Serv‚n (2000)). This paper examines an implication of these models that has mostly been overlooked: Habits strong enough to solve these puzzles imply an immediate marginal propensity to consume out of permanent shocks of much less than one. When the model is calibrated to roughly match the rise in the Japanese saving rate over the postwar period, it implies that the immediate MPC out of permanent tax cuts may be as low as 30 percent, suggesting that calls for permanent income tax cut as a quick means of stimulating aggregate demand in Japan may be misguided.

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Document Object Identifier (DOI): 10.3386/w7839

Published: Carroll, Christopher D. "Risks Habits' And The Marginal Propensity To Consume Out Of Permanent Income, Or, How Much Would A Permanent Tax Cut Boost Japanese Consumption?," International Economic Journal, 2000, v14(4,Winter), 1-40.

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