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Binary响应非参数回归在市场细分研究中的应用
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作者 刘静 《统计与决策》 CSSCI 北大核心 2009年第18期161-162,共2页
文章讨论了Binary响应数据广义非参数回归模型的贝叶斯惩罚样条推断,并将此模型应用到W公司2007年度的市场研究数据中,讨论了年龄与消费者属于某一特定细分市场的可能性大小之间的关系。
关键词 Binary数据 Logit变 义非参数回归 惩罚样条 市场细分 MCMC
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Fitting Generalized Additive Logistic Regression Model with GAM Procedure
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作者 Suresh Kumar Sharma Rashmi Aggarwal Kanchan Jain 《Journal of Mathematics and System Science》 2013年第9期442-453,共12页
In dealing with nonparametric regression the GAM procedure is the most versatile of several new procedures. The terminology behind this procedure is more flexible than traditional parametric modeling tools. It relaxes... In dealing with nonparametric regression the GAM procedure is the most versatile of several new procedures. The terminology behind this procedure is more flexible than traditional parametric modeling tools. It relaxes the usual assumptions of parametric model and enables us to uncover structure to establish the relationship between independent variables and dependent variable in exponential family that may not be obvious otherwise. In this paper, we discussed two methods of fitting generalized additive logistic regression model, one based on Newton Raphson method and another based on iterative weighted least square method for first and second order Taylor series expansion. The use of the GAM procedure with the specified set of weights, using local scoring algorithm, was applied to real life data sets. The cubic spline smoother is applied to the independent variables. Based on nonparametric regression and smoothing techniques, this procedure provides powerful tools for data analysis. 展开更多
关键词 Logistic model iterative generalized additive model weighted least squares cubic splines.
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GENERALIZED p-VALUES FOR TESTING REGRESSION COEFFICIENTS IN PARTIALLY LINEAR MODELS
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作者 Huimin HU Xingzhong XU Guoying LI 《Journal of Systems Science & Complexity》 SCIE EI CSCD 2010年第6期1118-1132,共15页
The one-sided and two-sided hypotheses about the parametric component in partially linear model are considered in this paper. Generalized p-values are proposed based on fiducial method for testing the two hypotheses a... The one-sided and two-sided hypotheses about the parametric component in partially linear model are considered in this paper. Generalized p-values are proposed based on fiducial method for testing the two hypotheses at the presence of nonparametric nuisance parameter. Note that the nonparametric component can be approximated by a linear combination of some known functions, thus, the partially linear model can be approximated by a linear model. Thereby, generalized p-values for a linear model are studied first, and then the results are extended to the situation of partially linear model. Small sample frequency properties are analyzed theoretically. Meanwhile, simulations are conducted to assess the finite sample performance of the tests based on the proposed p-values. 展开更多
关键词 Fiducial inference frequency property generalized p-value hypothesis testing partially linear model.
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Testing for the parametric parts in a single-index varying-coefficient model
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作者 HUANG ZhenSheng ZHANG RiQuan 《Science China Mathematics》 SCIE 2012年第5期1017-1028,共12页
Single-index varying-coefficient models (SIVCMs) are very useful in multivariate nonparametric regression.However,there has less attention focused on inferences of the SIVCMs.Using the local linear method,we propose e... Single-index varying-coefficient models (SIVCMs) are very useful in multivariate nonparametric regression.However,there has less attention focused on inferences of the SIVCMs.Using the local linear method,we propose estimates of the unknowns in the SIVCMs.In this article,our main purpose is to examine whether the generalized likelihood ratio (GLR) tests are applicable to the testing problem for the index parameter in the SIVCMs.Under the null hypothesis our proposed GLR statistic follows the chi-squared distribution asymptotically with scale constant and degree of freedom independent of the nuisance parameters or functions,which is called as Wilks' phenomenon (see Fan et al.,2001).A simulation study is conducted to illustrate the proposed methodology. 展开更多
关键词 generalized likelihood ratio index parameter local smoothing method single-index models Wilks' type of phenomenon
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