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The numerical delta method

delete2018-10-01
delete26
PRE
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H
Han Hong *
J
Jessie Li
DOI:10.1016/j.jeconom.2018.06.007delete
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Abstract

Abstract

En 中文
This paper provides a numerical derivative based Delta method that complements the recent work by Fang and Santos (2014) and also generalizes a previous insight by Song (2014). We show that for an appropriately chosen sequence of step sizes, the numerical derivative based Delta method provides consistent inference for functions of parameters that are only directionally differentiable. Additionally, it provides uniformly valid inference for certain convex and Lipschitz functions which include all the examples mentioned in Fang and Santos (2014). We extend our results to the second order Delta method and illustrate its applicability to inference for moment inequality models. (C) 2018 Elsevier B.V. All rights reserved.
Keywords:
Delta method
Numerical differentiation
Directional differentiability
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Journal of Econometrics cover
Journal of Econometrics
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4
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Stanford University
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University of California System cover
University of California System
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