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Adaptive semiparametric estimation for single index models with jumps

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  • Han, Zhong-Cheng
  • Lin, Jin-Guan
  • Zhao, Yan-Yong

Abstract

The single index model is one of the most popular semiparametric models in applied quantitative sciences. This paper studies a single index model with unknown jumps (SIMJ) that occur in the link function. An adaptive semiparametric estimation procedure is proposed for estimating the index coefficient and link function. The asymptotic normality of the resulting estimators for both the parametric and nonparametric parts can be established under some mild conditions and without specifying the error distribution. We show that the resulting estimators are robust and efficient for different error distributions. In particular, a modified EM algorithm is developed to implement the adaptive semiparametric estimation in practice. Numerical simulations and real data analysis are conducted to illustrate the finite sample performance of the proposed approach.

Suggested Citation

  • Han, Zhong-Cheng & Lin, Jin-Guan & Zhao, Yan-Yong, 2020. "Adaptive semiparametric estimation for single index models with jumps," Computational Statistics & Data Analysis, Elsevier, vol. 151(C).
    • Handle: RePEc:eee:csdana:v:151:y:2020:i:c:s0167947320301043
    DOI: 10.1016/j.csda.2020.107013
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