Asymptotic Efficiency in Parametric Structural Models with Parameter‐Dependent Support

In certain auction, search, and related models, the boundary of the support of the observed data depends on some of the parameters of interest. For such nonregular models, standard asymptotic distribution theory does not apply. Previous work has focused on characterizing the nonstandard limiting distributions of particular estimators in these models. In contrast, we study the problem of constructing efficient point estimators. We show that the maximum likelihood estimator is generally inefficient, but that the Bayes estimator is efficient according to the local asymptotic minmax criterion for conventional loss functions. We provide intuition for this result using Le Cam's limits of experiments framework.     

Relationship between childbirth and access to postsecondary education among young women ageing out of foster care

Early childbirth is common among young women ageing out of foster care and may impede their educational progress. However, few studies have explored access to postsecondary education among young mothers who have been in foster care. The present study used data from a large, national sample of young people in foster care (National Youth in Transition Database, NYTD) to examine the link between early childbirth and young women's access to postsecondary education between ages 19 and 21, controlling for an array of covariates. The study sample included 2,207 young women who had completed a high school diploma or GED by age 19 and who participated in three NYTD interviews at ages 17, 19 and 21. Childbirth between ages 19 and 21 was linked to decreased access to postsecondary education. However, no relationship was found between access to postsecondary education and childbirth by age 17 or childbirth between ages 17 and 19. Implications for policy, practice and research are discussed.     

亚审美:"元宇宙"中吃播视频的消费陷阱和规避策略

"元宇宙"是数字技术的产物,也是大众意识自觉参与的空间场景."元宇宙"重新构建了大众的审美经验和审美活动方式,计算和保存具体化的审美风格,以视觉、听觉等感官元素传达给消费者.消费者沉醉在他者的审美牢笼中,甘愿为数字技术打造的梦幻世界买单.通过梳理"元宇宙"中"吃播"的文本呈现、粉丝评论等内容,分析吃播粉丝的审美趋势,以及吃播视频的消费与审美的关系.吃播视频的粉丝群体大部分是青年一代,他们从吃播视频中获得生理和情绪的满足,并以崇拜的视角跟随着意见领袖.而吃播博主深谙其粉丝心理,以平易近人的方式,伪造成与粉丝有共同审美需求的同类,获取粉丝的消费能力,体现为一种"元宇宙"空间的消费审美特征.吃播视频俨然成为资本获取消费手段的媒介,社会个体、传播主体、媒介平台和国家机构需要共同为防沉迷消费主义而进行规制.