区域一体化下的广州市居民城际通勤特征分析

在区域一体化背景下,随着区域基础设施的日益完善、区域产业分工与合作格局的形成,区域内城市间的人口流动日益密集,城际通勤者的队伍正日益壮大,并成为检验和分析区域一体化格局的研究对象。本文以广州为案例,。在分析城际通勤基本特征的基础上,从交通设施、社会经济背景和制度政策因素等角度,分析城际通勤的影响机制。认为,交通设施决定通勤方式,反映于通勤时间,制约出行一时间比率;社会经济背景属性影响城际通勤,家庭结构越复杂、工作职务和收入水平越低,其出行一时间比率越大,“行政区”经济、市场化改革等制度政策因素也对城际通勤产生影响。并从完善交通设施、优化基础设施布局、改善城市与区域规划、促进公共服务设施均衡配置等方面提出相关政策建议。     

水资源的可持续利用与国家行政体制改革——兼论水权概念的局限性

水资源的可持续利用是能否实现可持续发展的重大战略问题,其核心是建立节水社会和有效防治水污染.人们试图借鉴经济学的产权理论,把水权理论作为突破水资源改革难题的核心概念,但它并不能在水资源的可持续利用、合理配置和保护上提供有效的解释力.水资源可持续利用的核心问题是与现行的行政体制安排之间存在着冲突,其出路是通过国家行政体制的改革来提高政府的行政能力.     

传媒文化:做什么与怎么做

作为一种文化,当代传媒正在深刻影响我们的日常生活。它在塑造意识形态、社会动员、推动消费和认同建构等方面扮演了举足轻重的角色。在传媒文化场域中,形成了主导文化、大众文化和精英文化三个次场,这从根本上规制了中国传媒文化的当代结构。视觉文化的转向进一步加强了传媒文化的视觉霸权和视觉拜物教,看得见才能吸引人和广泛传布,已成为人所共知的游戏规则。传媒公域作为公共话语的场所,也越发地深入私人领域,它带来了一系列不得不关注的复杂传媒伦理问题。快感的非政治化进一步凸显了消费文化的秉性,间歇性的政治冲动和传媒消费长期的快感化,实际上产生了传媒公众的政治冷漠。当人们越来越依赖于传媒来实现自我和族群的认同建构时,混杂和同一的矛盾显得越来越突出。中国当代传媒文化的这些发展趋势揭示了中国社会文化转型期的诸多矛盾。     

族群理论的流变及其与民族理论的关系

人类学(Anthropology)/民族学(Ethnology)传统上的核心概念是“文化(culture)”,其学术传统与我国1949年以来的以“民族”为核心概念的“民族研究”有较大的区别。人类学中的族群理论(theories of Ethnicity)虽非人类学传统的、核心的研究领域,但自20世纪70年代以来也成为一个热门话题,并与我国的民族理论有互相参照的意义。本文在回顾族群理论诸流派的基础上,重点论述了不同流派之间承袭与补充的关系;并论述指出,西方的“族群理论”与我国的“民族理论”分别代表主位和客位两种不同的视角、分别强调主观和客观两种不同的立场。     

Semi-parametric hybrid empirical likelihood inference for two-sample comparison with censored data

Two-sample comparison problems are often encountered in practical projects and have widely been studied in literature. Owing to practical demands, the research for this topic under special settings such as a semiparametric framework have also attracted great attentions. Zhou and Liang (Biometrika 92:271–282, 2005) proposed an empirical likelihood-based semi-parametric inference for the comparison of treatment effects in a two-sample problem with censored data. However, their approach is actually a pseudo-empirical likelihood and the method may not be fully efficient. In this study, we develop a new empirical likelihood-based inference under more general framework by using the hazard formulation of censored data for two sample semi-parametric hybrid models. We demonstrate that our empirical likelihood statistic converges to a standard chi-squared distribution under the null hypothesis. We further illustrate the use of the proposed test by testing the ROC curve with censored data, among others. Numerical performance of the proposed method is also examined.     

近十年西部少数民族民间美术研究的发展态势与思考——基于2010-2019年国家社科基金艺术学项目的统计分析

从国家社科基金艺术学立项项目研究角度切入,将2010-2019年间有关西部少数民族民间美术研究的立项项目作为研究对象,对项目类型、项目负责人及其所在单位,以及项目名称的高频词等内容进行统计分析。研究表明,近十年来西部少数民族民间美术立项总体呈持续增长态势,不但注重基础理论研究,而且与时俱进,项目研究紧密与国家政策导向关联。西部少数民族民间美术研究的未来发展,应继续加强基础理论研究,注重实践应用研究,关注艺术学新兴边缘学科研究。     

A sequential conditional probability ratio test procedure for comparing diagnostic tests

In this paper, we derive sequential conditional probability ratio tests to compare diagnostic tests without distributional assumptions on test results. The test statistics in our method are nonparametric weighted areas under the receiver-operating characteristic curves. By using the new method, the decision of stopping the diagnostic trial early is unlikely to be reversed should the trials continue to the planned end. The conservatism reflected in this approach to have more conservative stopping boundaries during the course of the trial is especially appealing for diagnostic trials since the end point is not death. In addition, the maximum sample size of our method is not greater than a fixed sample test with similar power functions. Simulation studies are performed to evaluate the properties of the proposed sequential procedure. We illustrate the method using data from a thoracic aorta imaging study.     

Combining least-squares and quantile regressions

Least-squares and quantile regressions are method of moments techniques that are typically used in isolation. A leading example where efficiency may be gained by combining least-squares and quantile regressions is one where some information on the error quantiles is available but the error distribution cannot be fully specified. This estimation problem may be cast in terms of solving an over-determined estimating equation (EE) system for which the generalized method of moments (GMM) and empirical likelihood (EL) are approaches of recognized importance. The major difficulty with implementing these techniques here is that the EEs associated with the quantiles are non-differentiable. In this paper, we develop a kernel-based smoothing technique for non-smooth EEs, and derive the asymptotic properties of the GMM and maximum smoothed EL (MSEL) estimators based on the smoothed EEs. Via a simulation study, we investigate the finite sample properties of the GMM and MSEL estimators that combine least-squares and quantile moment relationships. Applications to real datasets are also considered.     

A conceptual approach to the creation of public–private partnerships in social welfare

All societies are confronted with complex, often difficult to overcome, challenges associated with changing population demographics. These challenges have placed increasing demands on society for social protection. Individual citizens, politicians, and scholars alike all are searching for the ideal configuration of the welfare mix, that is, a combination of various institutions that can offer the best possible combination of essential goods and services for everyone in every society. Key Practitioner Message: ● The organization of the public–private welfare partnership as viewed from a conceptual perspective; ● The unique contextual and contemporary social forces that shape public–private partnerships in modern welfare state practice; ● Contrasts in the origins and nature of public–private partnerships between two of the world's most populous countries whose histories, traditions, values, and norms differ fundamentally from one another. Even so, considerable learning regarding welfare state formation in different societies is possible through the application of the Public–Private Development Mix to the analysis of welfare state formation in these two contrasting societies.