TECHNICAL WORKING PAPER SERIES ESTIMATING EULER EQUATIONS Orazio … · 2020. 3. 20. · Estimating...
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TECHNICAL WORKING PAPER SERIES
ESTIMATING EULER EQUATIONS
Orazio P. AttanasioHamish Low
Technical Working Paper 253http://www.nber.org/papers/T0253
NATIONAL BUREAU OF ECONOMIC RESEARCH1050 Massachusetts Avenue
Cambridge, MA 02138May 2000
We would like to thank Chris Carroll, Costas Meghir and Guglielmo Weber for useful discussions. Theviews expressed herein are those of the authors and are not necessarily those of the National Bureau ofEconomic Research.
© 2000 by Orazio P. Attanasio and Hamish Low. All rights reserved. Short sections of text, not to exceedtwo paragraphs, may be quoted without explicit permission provided that full credit, including © notice, isgiven to the source.
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Estimating Euler EquationsOrazio P. Attanasio and Hamish LowNBER Technical Working Paper No. 253May 2000JEL No. E2
ABSTRACT
In this paper we consider conditions under which the estimation of a log-linearized Euler
equation for consumption yields consistent estimates of the preference parameters. When utility is
isoelastic and a sample covering a long time period is available, consistent estimates are obtained
from the log-linearized Euler equation when the innovations to the conditional variance of
consumption growth are uncorrelated with the instruments typically used in estimation. We perform
a Montecarlo experiment, consisting in solving and simulating a simple life cycle model under
uncertainty, and show that in most situations, the estimates obtained from the log-linearized equation
are not systematically biased. This is true even when we introduce heteroscedasticity in the process
generating income. The only exception is when discount rates are very high (47% per year). This
problem arises because consumers are nearly always close to the maximum borrowing limit: the
estimation bias is unrelated to the linearization. Finally, we plot life cycle profiles for the variance
of consumption growth, which, except when the discount factor is very high, is remarkably flat. This
implies that claims that demographic variables in log-linearized Euler equations capture changes in
the variance of consumption growth are unwarranted.
Orazio P. Attanasio Hamish LowDepartment of Economics Faculty of EconomicsUniversity College London University of CambridgeGower Street Sidgwick AvenueLondon WC1E 6BT Cambridge CB3 9DDUnited Kingdom United Kingdomand NBER and Institute for Fiscal [email protected] [email protected]
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