The numerical delta method

Han Hong and Jessie Li

Journal of Econometrics, 2018, vol. 206, issue 2, 379-394

Abstract: 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.

Keywords: Delta method; Numerical differentiation; Directional differentiability (search for similar items in EconPapers)
JEL-codes: C12 C13 C50 (search for similar items in EconPapers)
Date: 2018
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Citations: View citations in EconPapers (28)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:econom:v:206:y:2018:i:2:p:379-394

DOI: 10.1016/j.jeconom.2018.06.007

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