Online Smooth Backfitting for Generalized Additive Models

Ying Yang, Fang Yao and Peng Zhao

Journal of the American Statistical Association, 2024, vol. 119, issue 546, 1215-1228

Abstract: We propose an online smoothing backfitting method for generalized additive models coupled with local linear estimation. The idea can be extended to general nonlinear optimization problems. The strategy is to use an appropriate-order expansion to approximate the nonlinear equations and store the coefficients as sufficient statistics which can be updated in an online manner by the dynamic candidate bandwidth method. We investigate the statistical and algorithmic convergences of the proposed method. By defining the relative statistical efficiency and computational cost, we further establish a framework to characterize the tradeoff between estimation performance and computation performance. Simulations and real data examples are provided to illustrate the proposed method and algorithm. Supplementary materials for this article are available online.

Date: 2024
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DOI: 10.1080/01621459.2023.2182213

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