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Statistical Properties of Generalized Method-of-Moments Estimators of Structural Parameters Obtained from Financial Market Data

George Tauchen
Journal of Business & Economic Statistics
Vol. 4, No. 4 (Oct., 1986), pp. 397-416
DOI: 10.2307/1391493
Stable URL: http://www.jstor.org/stable/1391493
Page Count: 20
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Statistical Properties of Generalized Method-of-Moments Estimators of Structural Parameters Obtained from Financial Market Data
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Abstract

The article examines the properties of generalized method of moments GMM estimators of utility function parameters. The research strategy is to apply the GMM procedure to generated data on asset returns from stochastic exchange economies; discrete methods and Markov chain models are used to approximate the solutions to the integral equations for the asset prices. The findings are as follows: (a) There is variance/bias trade-off regarding the number of lags used to form instruments; with short lags, the estimates of utility function parameters are nearly asymptotically optimal, but with longer lags the estimates concentrate around biased values and confidence intervals become misleading. (b) The test of the overidentifying restrictions performs well in small samples; if anything, the test is biased toward acceptance of the null hypothesis.

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