跳到正文
← 返回论文列表与筛选
阅读说明

本页整理公开书目信息,不生成学术质量评分。AI 解读根据题名及所注明的摘要或原文片段生成,未完成全文核验,可能有误;具体假设、证明与结论请核对原文。摘要保留来源文本,未经模型改写。

DOI 首次登记不等于接收或发表日期。部分更正、评论等条目没有独立摘要;缺少可靠材料时保留待补状态。

引用量采用 OpenAlex 单条关联记录,不合计多个记录;关联记录可能包含正式发表版本,不等于此版本单独引用。缺失不视为零,引用指标不代表论文质量。

关注作者按书目中的完整姓名匹配,同名和姓名变体需人工辨别。相关论文先按共享细分方向和具体方法排列,再参考通用方法与发表日期。

分类依据与纠错

AI 根据所提供的论文材料归类:摘要研究通用条件密度逼近,未明确涉及分位数、分布效应或结构经济模型,故不强行分类。

反馈分类问题

正在核对关联版本…

代码、数据与补充材料

正在核对对应版本的资源…

关注这篇论文的作者
Andriy Norets

用平滑回归混合模型逼近条件密度

研究问题
有限正态回归混合模型的均值、方差或混合权重随协变量变化时,可以在何种范围内逼近多元条件密度?
方法与思路
作者用 Kullback–Leibler 距离研究不同混合设定的逼近能力,包括仅权重随协变量变化及单变量下仅均值灵活变化。
材料陈述的贡献
摘要称给出不同设定的逼近速率和界,并说明灵活方差可以放宽可逼近密度的限制,结果可推广至位置尺度混合。
阅读关注点
应核对可逼近密度类的限制、混合项数量与逼近误差的关系,以及逼近结果如何用于估计量一致性证明。
阅读边界
材料为稿件版本未注明的 OpenAlex 索引摘要;逼近结论不能直接视为估计一致性或有限样本保证,具体条件未提供。

原文摘要

This paper shows that large nonparametric classes of conditional multivariate densities can be approximated in the Kullback–Leibler distance by different specifications of finite mixtures of normal regressions in which normal means and variances and mixing probabilities can depend on variables in the conditioning set (covariates). These models are a special case of models known as “mixtures of experts” in statistics and computer science literature. Flexible specifications include models in which only mixing probabilities, modeled by multinomial logit, depend on the covariates and, in the univariate case, models in which only means of the mixed normals depend flexibly on the covariates. Modeling the variance of the mixed normals by flexible functions of the covariates can weaken restrictions on the class of the approximable densities. Obtained results can be generalized to mixtures of general location scale densities. Rates of convergence and easy to interpret bounds are also obtained for different model specifications. These approximation results can be useful for proving consistency of Bayesian and maximum likelihood density estimators based on these models. The results also have interesting implications for applied researchers.

笔记与分组