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Stability Comparisons of Estimators (5/1985 and 11/1985)

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Abstract

This paper investigates a property of estimators called stability. The stability exponent of an estimator is defined to be a measure of the effect of any single observation in the sample on the realized value of the estimator. High stability is often desirable for robustness against misspecification and against highly variable observations. Stability exponents are determined and compared for a wide variety of estimators and econometric models. They are found to depend on the maximal moment exponent (i.e., the number of finite moments) of the estimator's influence curve. Since it is possible often to construct estimators with specified influence curves, estimators with different stability exponents can be construed.

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  • Donald W.K. Andrews, 1984. "Stability Comparisons of Estimators (5/1985 and 11/1985)," Cowles Foundation Discussion Papers 710R, Cowles Foundation for Research in Economics, Yale University, revised Nov 1985.
    • Handle: RePEc:cwl:cwldpp:710r2
    Note: CFP 663.
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