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    題名: Assessing Ordinal Logistic Regression Models via Nonparametric Smoothing
    作者: Lin, K. C.;陳怡如;Chen, Yi-ju
    貢獻者: 淡江大學統計學系
    關鍵詞: Cumulative logit model;Deviance;Local linear smoother;Pearson chi-square
    日期: 2008-01-01
    上傳時間: 2009-11-30 12:54:52 (UTC+8)
    出版者: Taylor & Francis
    摘要: A nonparametric local linear smoothing technique for testing goodness-of-fit of ordinal logistic regression models with continuous and categorical covariates is presented. This proposed test statistic is a generalization of Lin and Chen's statistic (2005 Lin , K. C. , Chen , Y. J. ( 2005 ). Testing the goodness-of-fit of logistic models based on local linear smoothing . Int. J. Infor. Mgmnt. Sci. 16 : 83 – 95 .
    ) to ordinal response data. The extension of logistic regression models for binary responses to ordinal responses is usually involved by modeling cumulative logits. The expectation and variance of the proposed test statistic are derived, and the sampling distribution of the test statistic, which approximates a scaled chi-square distribution is evaluated by simulation. The power comparison between the proposed test and methods of Pulkstenis and Robinson (2004 Pulkstenis , E. , Robinson , T. J. ( 2004 ). Goodness-of-fit tests for ordinal response regression models . Statist. Med. 23 : 999 – 1014 .
    [CrossRef], [PubMed], [Web of Science ®]
    ) are also provided. The simulations reveal that the proposed test has greater power to detect the omitted interaction term, incorrectly functional form of continuous covariates, or misspecification of the complimentary log-log link function for various sample sizes. The proposed testing procedure is illustrated by a numerical study.
    關聯: Communications in Statistics : Theory and Methods 37(6) , pp. 917-930
    DOI: 10.1080/03610920701713179
    顯示於類別:[統計學系暨研究所] 期刊論文

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