Penalized spline estimation for panel count data model with time-varying coefficients

Fei Qin and Zhangsheng Yu ()
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Fei Qin: Shanghai Jiao Tong University
Zhangsheng Yu: Shanghai Jiao Tong University

Computational Statistics, 2021, vol. 36, issue 4, No 4, 2413-2434

Abstract: Abstract We consider a panel count data model with both time-varying and time-invariant coefficients. We estimate the baseline function and the time-varying coefficients using penalized splines based on the pseudolikelihood method. We evaluate the performance of three efficient Newton–Rapshon-based algorithms and another adaptive barrier algorithm. We propose a novel cross-validated score to select the smoothing parameters and deduce an easy-to-compute approximation to the score. Extensive simulations are conducted to compare the four algorithms, to compare the proposed penalized spline estimation with regression spline estimation and kernel estimation, and to assess the inference performance and robustness of the penalized spline estimation. Finally, we illustrate our method by using a data set from a childhood wheezing study.

Keywords: Pseudolikelihood; Smoothing parameter selection; Projected Newton–Raphson algorithm; Global convergence; Cross-validated log-likelihood score (search for similar items in EconPapers)
Date: 2021
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DOI: 10.1007/s00180-021-01109-z

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