Luo Yulei,Wang Gaowang,Young Eric:What We Don’t Know Doesn’t Hurt Us: Rational Inattention and the Permanent Income Hypothesis in General Equilibrium-山东大学经济研究院
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Luo Yulei,Wang Gaowang,Young Eric:What We Don’t Know Doesn’t Hurt Us: Rational Inattention and the Permanent Income Hypothesis in General Equilibrium
Updat:Nov 7, 2014   Author:admin   Click:[]

Abstract: This paper derives the general equilibrium effects of rational inattention (or RI; Sims 2003, 2010) in a model of incomplete income insurance (Huggett 1993, Wang 2003). We show that, under the assumption of CARA utility with Gaussian shocks, the Permanent Income Hypothesis (PIH) arises in equilibrium, as in models with full information-rational expectations, due to a balancing of precautionary savings and impatience. We then explore how RI affects the equilibrium joint dynamics of consumption, income and wealth, and find that elastic attention can make the model fit the data better. We finally show that the welfare costs of incomplete information are even smaller due to general equilibrium adjustments in interest rates.

Keywords: Rational Inattention; Permanent Income Hypothesis; General Equilibrium; Consumption and Income Volatility

The paper can be downloaded at the following link.

https://ideas.repec.org/p/pra/mprapa/59182.html

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