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題名 | Bootstrap Estimate of Kullback-Leibler Information for Model Selection |
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作者姓名(外文) | Shibata,Ritei; | 書刊名 | Statistica Sinica |
卷期 | 7:2 1997.04[民86.04] |
頁次 | 頁375-394 |
分類號 | 319.5 |
關鍵詞 | 訊息準則; 模式選取; Bias estimation; Bootstrap; Information criterion; Kullback-Leibler information; |
語文 | 英文(English) |
英文摘要 | Estimation of Kullback-Leibler information is a crucial part of deriving a statistical model selection procedure which, like AIC, is based on the likelihood principle. To discriminate between nested models, we have to estimate Kullback-Leibler information up to the order of a constant, while Kullback-Leibler information itself is of the order of the number of observations. A correction term employed in AIC is an example of how to fulfill this requirement; however the correction is a simple minded bias correction to the log maximum likelihood and there is no assurance that such a bias correction yields a good estimate of Kullback-Leibler information. In this paper we investigate a bootstrap type estimate of Kullback-Leibler information as an alternative. We find show that both bootstrap estimates proposed by Efron (1983, 1986) and by Cavanaugh and Shumway (1997) are at least asymptotically equivalent and there exist many other equivalent bootstrap estimates. We also show that all such methods are asymptotically equivalent to a non-bootstrap method known as TIC (Takeuchi (1976)), which is a generalization of AIC when the re-sampling method is non-parametric. Otherwise, for example, if the re-sampling method is parametric they are asymptotically equivalent to AIC. Therefore, the use of a bootstrap type estimate is not advantageous if enough observations are available and simple calculations of a non-bootstrap estimates AIC or TIC is not a burden. At the same time, it is also true that the use of a bootstrap estimate in place of a non-bootstrap estimate is reasonable and advantageous if the non-bootstrap estimate is too complicated to evaluate analytically. |
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