Aggregating Rational Expectations Models in the Presence of Unobserved Micro Heterogeneity
University of Lausanne; Swiss Finance Institute
August 1, 2009
Swiss Finance Institute Research Paper No. 09-30
Our paper addresses the correction of the aggregation bias in linear rational expectations models when there is some unobserved micro-parameter heterogeneity and only macro data are available. Starting from Lewbel (1994), we propose two new consistent estimators, which rely on a exible parametric specification of the cross-sectional parameter distributions and account for the dependence across coefficients inherent in such models. A Monte-Carlo study reveals that the nite-sample and asymptotic properties of the proposed estimators correct the aggregation bias found with the maximum-likelihood and generalized-method-of-moments approaches. As a by-product, we can also infer the cross-sectional distribution of the parameters. Finally, we eassess the empirical evidence about the New Keynesian Phillips curve and explain the apparent discrepancy between micro- and macro-based estimates of the average persistence of inflation.
Number of Pages in PDF File: 57
Keywords: aggregation, rational expectations models, heterogeneity
JEL Classification: C13, C2, E2working papers series
Date posted: September 6, 2009
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