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Nonparametric additive beta regression for fractional response with application to body fat data

Author

Listed:
  • Kuangnan Fang

    (Xiamen University
    Xiamen University)

  • Xinyan Fan

    (Xiamen University)

  • Wei Lan

    (Southwestern University of Finance and Economics)

  • Bingquan Wang

    (Xiamen University)

Abstract

Fractional data that are restricted in the standard unit interval (0, 1) with a highly skewed distribution are commonly encountered. Such data arise in various areas, such as economics, finance, and medicine, among others. One natural idea to model such data is to use the beta family due to its flexibility to accommodate various density shapes. In this paper, we propose a nonparametric additive beta regression model along with a variable selection procedure, where the mean response is related to covariates through the combination of unknown functions of covariates, which can be approximated on a B-spline basis. By using this approximation method, we transform the problem of variable selection into the problem of selecting the groups of coefficients in the expansion. Based on the penalized likelihood method for group variable selection, we successfully select the significant covariates. Moreover, the estimation and selection consistencies and the properties of the penalized estimators are established. The simulation studies demonstrate that the performance of our proposed method is quite good. Finally, we apply the proposed method to body fat data, and we obtain several important findings with satisfactory selection and prediction performance.

Suggested Citation

  • Kuangnan Fang & Xinyan Fan & Wei Lan & Bingquan Wang, 2019. "Nonparametric additive beta regression for fractional response with application to body fat data," Annals of Operations Research, Springer, vol. 276(1), pages 331-347, May.
    • Handle: RePEc:spr:annopr:v:276:y:2019:i:1:d:10.1007_s10479-018-2875-2
    DOI: 10.1007/s10479-018-2875-2
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    References listed on IDEAS

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