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A Powerful Chi-Square Specification Test with Support Vectors

Yuhao Li, Xiaojun Song

arXiv 7 May 2025 · Econometrics

arXiv:2505.04414 · PDF · DOI · OpenAlex · Extracted main text

Abstract

Specification tests, such as Integrated Conditional Moment (ICM) and Kernel Conditional Moment (KCM) tests, are crucial for model validation but often lack power in finite samples. This paper proposes a novel framework to enhance specification test performance using Support Vector Machines (SVMs) for direction learning. We introduce two alternative SVM-based approaches: one maximizes the discrepancy between nonparametric and parametric classes, while the other maximizes the separation between residuals and the origin. Both approaches lead to a $t$-type test statistic that converges to a standard chi-square distribution under the null hypothesis. Our method is computationally efficient and capable of detecting any arbitrary alternative. Simulation studies demonstrate its superior performance compared to existing methods, particularly in large-dimensional settings.

Citation extraction

18
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27
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appendix boundary found by appendix_command · 70% of the source is main text. Read the extracted text to check this.

Most heavily cited references

The works this paper leans on most, across its whole bibliography — not restricted to papers in our corpus. Ranked by composite intensity, which combines how often a work is mentioned, how many sections mention it, and how much of that falls in the main text rather than the appendix.

ReferenceIntensityMentionsSectionsMain text
1Juan Carlos Escanciano (2024) A gaussian process approach to model checks0.87452100%
2Krikamol Muandet, Wittawat Jitkrittum, and Jonas Kübler (2020) Kernel conditional moment test via maximum moment restriction0.81142100%
3Herman J Bierens (1982) Consistent model specification tests0.64422100%
4B Schölkopf (2002) Learning with kernels: support vector machines, regularization, optimization, and beyond0.51121100%
5Miguel A Delgado, Manuel A Domńguez, and Pascal Lavergne (2006) Consistent tests of conditional moment restrictions0.40511100%
6J Carlos Escanciano (2006) A consistent diagnostic test for regression models using projections0.40511100%
7Arthur Gretton, Dino Sejdinovic, Heiko Strathmann, Sivaraman Balakri… (2012) Optimal kernel choice for large-scale two-sample tests0.40511100%
8Simon Hediger, Loris Michel, and Jeffrey Näf (2022) On the use of random forest for two-sample testing0.40511100%
9Ilmun Kim, Aaditya Ramdas, Aarti Singh, and Larry Wasserman (2021) Classification accuracy as a proxy for two-sample testing0.40511100%
10M Lichman (2017) Uci machine learning repository. school of information and computer science, university of california, irvine, ca (2013)0.40511100%

Showing the top 10 of 18 scored citations.

Cited by, within the corpus

arXiv econ.EM papers that cite this one, ranked by how heavily they lean on it.

Citing paperIntensityMentionsSections
1A Consistent ICM-based $^2$ Specification Test0.40511