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Ali al-Nowaihi

28 February 2005
WORKING PAPER SERIES - No. 444
Details
Abstract
This model extends the keeping up with the Joneses (KUJ) model to incorporate the notion that positional concerns in consumption are best modelled with a reference dependence specification of preferences, as postulated by Tversky and Kahneman (1991) in the context of riskless choice. In line with this specification, which has received substantial empirical support in the literature, we assume that the marginal returns on the own consumption are increasing below the aggregate per capita levels of consumption (which is the reference point in our model). The main conclusion of the paper is that in our KUJ model aggregate consumption may be subject to sunspot fluctuations and the equilibrium level of consumption is not uniquely pinned down. The paper also discusses the role that fiscal policy can play in order to undo the effect of consumption externalities on both the determinacy and the desirability of the equilibrium.
JEL Code
D11 : Microeconomics→Household Behavior and Family Economics→Consumer Economics: Theory
H21 : Public Economics→Taxation, Subsidies, and Revenue→Efficiency, Optimal Taxation