Sieve Estimation of Time-Varying Panel Data Models With Latent Structures

We propose a heterogeneous time-varying panel data model with a latent group structure that allows the coefficients to vary over both individuals and time. We assume that the coefficients change smoothly over time and form different unobserved groups. When treated as smooth functions of time, the individual functional coefficients are heterogeneous across groups but homogeneous within a group. We propose a penalized-sieve-estimation-based classifier-Lasso (C-Lasso) procedure to identify the individuals’ membership and to estimate the group-specific functional coefficients in a single step. The classification exhibits the desirable property of uniform consistency. The C-Lasso estimators and their post-Lasso versions achieve the oracle property so that the group-specific functional coefficients can be estimated as well as if the individuals’ membership were known. Several extensions are discussed. Simulations demonstrate excellent finite sample performance of the approach in both classification and estimation. We apply our method to study the heterogeneous trending behavior of GDP per capita across 91 countries for the period 1960–2012 and find four latent groups.     

A Novel Method to Calculate Mean Survival Time for Time-to-Event Data

In the analysis of time-to-event data, restricted mean survival time has been well investigated in the literature and provided by many commercial software packages, while calculating mean survival time remains as a challenge due to censoring or insufficient follow-up time. Several researchers have proposed a hybrid estimator of mean survival based on the Kaplan–Meier curve with an extrapolated tail. However, this approach often leads to biased estimate due to poor estimate of the parameters in the extrapolated “tail” and the large variability associated with the tail of the Kaplan–Meier curve due to small set of patients at risk. Two key challenges in this approach are (1) where the extrapolation should start and (2) how to estimate the parameters for the extrapolated tail. The authors propose a novel approach to calculate mean survival time to address these two challenges. In the proposed approach, an algorithm is used to search if there are any time points where the hazard rates change significantly. The survival function is estimated by the Kaplan–Meier method prior to the last change point and approximated by an exponential function beyond the last change point. The parameter in the exponential function is estimated locally. Mean survival time is derived based on this survival function. The simulation and case studies demonstrated the superiority of the proposed approach.     

论审美的中介作用

关于审美与艺术的关系,中外美学史上历来存在政教中心论与审美中心论之争.但两者都没有给审美找到在艺术中的正确位置.确立审美在艺术中的地位的两条途径是其一,为了包容不是以"美"为主要描写对象的各种现代艺术,应该把"美的艺术"扩大到"审美的艺术",但"美的艺术"仍是艺术的主流.其二,为了纠正审美中心论忽视审美与艺术中的其他因素以及审美与艺术之外的其他社会因索的联系这一理论错误,必须以审美中介论取代审美中心论.     

International Business and National Culture: A Literature Review and Research Agenda

This literature review analyzes leading international business and management journals from 2000 to 2012 in order to explore the role of national culture in international business research. Through the analysis of the 265 selected articles, the study thematically maps the field and identifies research challenges and opportunities. It reflects on avenues for future research related to both thematic and methodological issues, among them: research focused on the impact of the home/host national culture on internationalization processes (as existing literature mainly focuses on cultural distance); the role to be played by new theoretical frameworks; and the need to consider cultural positions and cultural friction rather than traditional cultural distance when analyzing internationalization decisions.     

心理环境论

结合我国改革开放营造的新的心理环境的现实 ,从心理力的基点出发 ,深入地论述了社会文化与主体心力的关系 ,揭示了心理环境的内在机制 ;较全面地剖析了心理环境这一极其复杂的心理构成物的诸种要素 ,以及由它们所诱发的种种心力对主体心理行为产生的巨大影响     

资本主义、商品经济与中国的发展——新形势下重新认识马克思主义的思考

围绕着商品经济与中国的发展这一轴心,参照国外学者的相关论点,在马克思、列宁和毛泽东等人的视野之间形成纵横比较的理论张力,强调历史地、完整地、实事求是地学习和理解马克思主义,是新形势下促进马克思主义中国化、时代化和大众化的重要思想理论基础.     

金融危机后世界城市网络的变化与新趋势

本文主要探讨后危机时期世界城市网络体系的变化特征,并探讨这些趋势背后的深层次动因及影响要素。从网络体系的等级特征上看,中等层级的世界城市在网络中的地位迅速提高,使世界城市网络趋向于钟型结构。从区域属性上看,新兴经济体与亚太区域世界城市的崛起成为显著趋势,从而使世界城市网络的广度与深度得到提升。世界城市网络体系的新趋势,反映出危机后国际政治经济格局产生重大变化的背景下,全球化力量的调整与新布局。     

张申府的女权主义思想剖析

自由主义、无政府主义和试图贯通中西文化是张申府思想的基本特点,也是其女权主义思想的出发点和归宿。从男女平等和性自由出发,张申府对于传统婚姻和家庭及其观念进行了猛烈的抨击,倡导妇女的各种基本权利,主张从男女交往自由和婚姻家庭制度改革入手进行全面的社会改造。注重文化发展和社会发展的结合,融汇科学、逻辑和传统,不遗余力地强调妇女的现代意识自觉,构成了张申府女权主义思想的时代色彩。     

程序正义于中国司法实践之困境与出路

程序正义在西方法治实践中是一个核心的要素,对我国的法治建设也有重大意义.但程序正义在我国的司法实践中没有受到充分的重视和尊重.我们可以从历史传统、制度改造以及控权的角度来分析其原因并作对策研究.重点在于应当以开放的心态来看待程序正义,通过公开的信息交流,多元的观点辩驳,让民众由被动接受变为主动认识选择;通过开放式司法实践,培育法律人的程序伦理.