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arXiv 0903.0702math.STstat.TH
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半参数关联模型的渐近推断

Asymptotic inference for semiparametric association models

Gerhard Osius

摘要:

一对随机元$X$和$Y$的关联模型(例如,向量),其指定直到未知参数$\boldsθ$的优势比函数。这些模型被证明是半参数的意义上,他们不限制$X$和$Y$的边缘分布。优势比参数$\boldsθ$的推断可以通过对$X$有条件地采样$Y$或反之亦然来获得。推广结果从普伦蒂斯和派克,温伯格和Wacholder和斯科特和野生,我们表明,渐近推断$\boldsθ$下采样条件$Y$是相同的,如果采样条件$X$。常见的回归模型,例如分别具有典型链接或多变量线性的广义线性模型、逻辑模型,是回归参数$\boldsβ$与比值比参数$\boldsθ$密切相关的关联模型。因此,可以使用关联模型从以$Y$为条件的样本中得出对$\boldsβ$的推断。

英文摘要:

Association models for a pair of random elements $X$ and $Y$ (e.g., vectors) are considered which specify the odds ratio function up to an unknown parameter $\boldsθ$. These models are shown to be semiparametric in the sense that they do not restrict the marginal distributions of $X$ and $Y$. Inference for the odds ratio parameter $\boldsθ$ may be obtained from sampling either $Y$ conditionally on $X$ or vice versa. Generalizing results from Prentice and Pyke, Weinberg and Wacholder and Scott and Wild, we show that asymptotic inference for $\boldsθ$ under sampling conditional on $Y$ is the same as if sampling had been conditional on $X$. Common regression models, for example, generalized linear models with canonical link or multivariate linear, respectively, logistic models, are association models where the regression parameter $\boldsβ$ is closely related to the odds ratio parameter $\boldsθ$. Hence inference for $\boldsβ$ may be drawn from samples conditional on $Y$ using an association model.

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