Fitting competing risks data to bivariate Pareto models

This paper revisits two bivariate Pareto models for fitting competing risks data. The first model is the Frank copula model, and the second one is a bivariate Pareto model introduced by Sankaran and Nair (1993 Sankaran, P. G., and N. U. Nair. 1993. A bivariate Pareto model and its applications to reliability. Naval Research Logistics 40 (7):1013–1020. doi:10.1002/1520-6750(199312)40:7%3c1013::AID-NAV3220400711%3e3.0.CO;2-7.[Crossref], [Web of Science ®] , [Google Scholar]). We discuss the identifiability issues of these models and develop the maximum likelihood estimation procedures including their computational algorithms and model-diagnostic procedures. Simulations are conducted to examine the performance of the maximum likelihood estimation. Real data are analyzed for illustration.     

从“融入”到“扰动”——谈UAS模式中研究者在介入初期的角色定位及行动策略

在学校变革的UAS模式中,研究者的作用发挥是一个重要的议题。基于我们合作项目启动一年的历程,探索了从"融入"到"扰动"的研究者介入学校变革的初始路径,并指出做好角色定位和行动策略的选取,是完成这一过程转化的重要方面。"融入"是研究者最初的角色目标。"扰动"是研究者"融入"后的行动指向。从"融入"到"扰动"的过程,是研究者介入学校变革,启动并维系变革转化发生的过程。     

The elites’ collective subjectivities of the history of ethnic politics in Malaysia

ABSTRACT

Malaysia is one of the multi-ethnic, multi-cultural and multi-religious countries in Southeast Asia. Due to the pluralistic nature of Malaysia, it has a political structure based on ethnic politics. The ethnic preferential policies affected most domains of this country. The objective of this article is to examine the origin and background of ethnic politics in Malaysia. Findings of this study indicate that, ethnic politics originated during the British colonial period, it became a tool used by the Barisan Nasional for the legitimacy of regime. Moreover, ethnic politics in Malaysia today is intertwined with religion. Besides, there is the dilemma of the choice between the interest of certain ethnic group and national interests. However, with the opposition coalition Pakatan Harapan won the election in 9th May, UMNO-led BN lost power and interrupted its 61 years control, which leaves us an interesting topic to think about the future of Malaysian ethnic politics.     

基于分层教学理论的高职高专公共英语教改探索

针对高职高专院校学生生源的层次差异,英语教学可采用分层教学,即根据学生个体差异,将学生分成不同水平的班组,制订不同的计划、目标和方法进行教学。分层教学能够使更多的学生在各自基础上得到最为有效、合理的发展,使各类学生的潜能都能得到最大程度的开发。分层教学实施过程中,要注意制订科学合理的分层方案,进行科学有效的管理,注重教师教育科研水平的提升。     

社会变迁过程中政府能力的政策学解读--基于系统论观点

中国正处于巨大的社会变迁之中，复杂性与不确定性的环境特征对政府能力提出了更高要求。从系统论的视角看，政府能力体现在政府对变迁中社会环境的反应、适应与变革能力。基于系统论的政策学解读，政府能力最终可以归为“制定”和“执行”公共政策的能力。从环境与组织管理的关系出发，围绕公共政策的生命过程，可以分别考察政府在输入、转化、输出三个环节中政策制定和政策执行的情况，进而探讨政府能力提升的路径。     

郁达夫批评意识探索

作为中国现代文学史上的先驱人物,郁达夫的批评不仅是有自觉意识的,而且还是有明确的文学理想支撑的.从踏上文坛起,郁达夫就意识到批评与文学创作有着密切的关系,他所进行的文学批评、文艺批评无不是有的放矢的活动,他是在自己对文学、对批评的明确看法引导下与时代、与文学潮流展开对话的.率真、宽容、同情是他批评意识的三大特点,这三者与郁达夫接近文学作品并对之作出反应的心理状态息息相关,更应视作郁达夫与作品主体交流时所显示的思考的独特性所在.     

The burdens of social capital: How socially-involved people dealt with stress after Hurricane Katrina

Research shows that those with greater social capital enjoy better physical and mental health. The current study illuminates a paradox of social capital which may afflict those involved in traumatic events. Several years of survey data reveal a dynamic picture of the link between social capital and stress following Hurricane Katrina. Results reveal that initially after Katrina, those who were more socially embedded carried the greatest load with respect to helping the displaced population, thus experiencing more stress. But over time, the most socially-involved then snapped back from their stressful experiences more rapidly than isolates. This confirms that over the course of stressful events, social involvement first exposes people to more stress, but as time passes, provides them a significant buffer against negative psychosocial experiences.     

Comment on “Constrained Optimization Approaches to Estimation of Structural Models”

We revisit the comparison of mathematical programming with equilibrium constraints (MPEC) and nested fixed point (NFXP) algorithms for estimating structural dynamic models by Su and Judd (2012). Their implementation of the nested fixed point algorithm used successive approximations to solve the inner fixed point problem (NFXP‐SA). We redo their comparison using the more efficient version of NFXP proposed by Rust (1987), which combines successive approximations and Newton–Kantorovich iterations to solve the fixed point problem (NFXP‐NK). We show that MPEC and NFXP are similar in speed and numerical performance when the more efficient NFXP‐NK variant is used.     

Inference on Causal Effects in a Generalized Regression Kink Design

We consider nonparametric identification and estimation in a nonseparable model where a continuous regressor of interest is a known, deterministic, but kinked function of an observed assignment variable. We characterize a broad class of models in which a sharp “Regression Kink Design” (RKD or RK Design) identifies a readily interpretable treatment‐on‐the‐treated parameter (Florens, Heckman, Meghir, and Vytlacil (2008)). We also introduce a “fuzzy regression kink design” generalization that allows for omitted variables in the assignment rule, noncompliance, and certain types of measurement errors in the observed values of the assignment variable and the policy variable. Our identifying assumptions give rise to testable restrictions on the distributions of the assignment variable and predetermined covariates around the kink point, similar to the restrictions delivered by Lee (2008) for the regression discontinuity design. Using a kink in the unemployment benefit formula, we apply a fuzzy RKD to empirically estimate the effect of benefit rates on unemployment durations in Austria.     

Frailty modelling approaches for semi-competing risks data

Lifetime Data Analysis - In the semi-competing risks situation where only a terminal event censors a non-terminal event, observed event times can be correlated. Recently, frailty models with an...