Asymptotic distributions in affiliation networks with an increasing sequence

A central limit theorem for a linear combination of all the maximum likelihood estimators with an increasing dimension for affiliation networks has been established. Simulation studies are provided to illustrate the asymptotic results.     

Semiparametric estimation of treatment effect with density ratio model

In this study we propose a unified semiparametric approach to estimate various indices of treatment effect under the density ratio model, which connects two density functions by an exponential tilt. For each index, we construct two estimating functions based on the model and apply the generalized method of moments to improve the estimates. The estimating functions are allowed to be non smooth with respect to parameters and hence make the proposed method more flexible. We establish the asymptotic properties of the proposed estimators and illustrate the application with several simulations and two real data sets.     

The asymptotic covariance matrix of the QMLE in ARMA models

A compact analytical representation of the asymptotic covariance matrix, in terms of model parameters directly, of the quasi maximum likelihood estimator (QMLE) is derived in autoregressive moving average (ARMA) models with possible nonzero means and non-Gaussian error terms. For model parameters excluding the error variance, it is found that the Huber (1967 Huber, P. J. (1967). The behavior of maximum likelihood estimates under nonstandard conditions. Proceedings of the Fifth Berkeley Symposium on Mathematical Statistics and Probability, Volume 1, pp. 221–233. [Google Scholar]) sandwich form for the asymptotic covariance matrix degenerates into the inverse of the associated information matrix. In comparison to the existing result that involves the second moments of some auxiliary variables for the case of zero-mean ARMA models, the analytical asymptotic covariance in this article has an advantage in that it can be conveniently estimated by plugging in the estimated model parameters directly.     

社会工作实验课程教学体系研究

社会工作实验课程设计教学体系对实现社会工作专业人才培养目标具有重要意义。本文分析现阶段高校开展社会工作实验课程教学面临的机遇与挑战,尤其以参与式教学模式运用为中心论题,探究社会工作专业课程设计和教学方法设计应注重的原则,使教师引导学生与校外的实践活动相衔接,同时重点强调学生在课堂教学中的主体地位,在不同专业课程的教学过程中运用参与式教学工具诸如角色扮演、小组讨论等方式,以思维和行为训练为主线,有效提高学生的社工实务能力。     

个案管理模式兴起及其在医务社会工作中的启示 ——以癌末病患照顾者为例

本文通过文献研究探索目前已在社会工作服务中多领域运用的个案管理的缘起、发展、以及其工作流程和组成要素,并运用问卷调查和个案访谈的专业社会工作技巧收集有关癌末患者与其照顾者所面临的困难和问题,通过将个案管理的方法运用于癌末患者临终关怀的服务中,得出个案管理能够为面临着多重困难的癌末患者及其家属提供有效、完善的服务,可以帮助服务对象建立全面的资源网络,协助其获得一定的解决问题的能力。从而达到节省医疗资源、有效为癌末病患及其家属提供服务的目的,完善癌末病患临终关怀社会工作的内容及方法技巧。     

The social welfare reform during the progressive regimes of South Korea: Theoretical implications

This study assesses the social welfare reform during the progressive regimes of South Korea (hereafter Korea) led by President Kim Dae-Jung (1998-2003) and President Roh Moo-Hyun (2003-2008), and considers its theoretical implications. Analysis of the social welfare reform under the two progressive governments has indicated that the reform did not produce the anticipated results. Although the Korean economy has grown rapidly along with a considerable increase in the national income per capita in comparison with that in the past, the country's social welfare system still remains significantly underdeveloped in all respects, relative to that of all the other OECD countries with similar economic power, let alone the advanced welfare states in Western Europe. This study maintains that the key reason for the inertia or status quo despite the significant efforts of both the governments to expand social welfare is explained in the Korean growth-first doctrine, which inherently considers that distribution hinders growth and that social policy is secondary to economic policy, thus limiting the choices of the country's decision makers, as has been the case all along since the developmental period. Given that the growth-first doctrine inherently regarded the relationship between growth and welfare as mutually exclusive, it was perhaps natural that the influence of the doctrine upon the social welfare policy of both the progressive governments would not be so positive. This suggests that path dependence is active in the case of the Korean social welfare policy, thus substantiating the validity of path-dependence theory.     

"话语政治"的价值与缺失

哈贝马斯的交往行为理论和话语政治民主模式不仅表达了一个知识分子应有的良知,也在诸多方面为我们展现了人类令人鼓舞的前景;不仅为我们的进一步探索提供了一个新的路径,更在整合共和主义和自由主义的双重优势的平台上,在制度的层面为建构主体间广泛参与和积极互动的民主模式做出了有益的尝试。但是,哈贝马斯话语民主模式在许多方面也失于理想性的虚幻化。把人类之间的关系完全定位于运用语言和平交往的理解和共识上,是理想主义的诉求,也许具有理论上的探索意义,但如何消除人们之间利益上的差异、冲突是相当难的问题,仅仅靠语言沟通,达成共识是难以实现的,时间的无限延长,参与者的不断增多,看起来是实现了哈贝马斯所设定的理想言说情景,但是,这样一方面降低了交往的效率,一方面又增加了解决问题的难度和成本,理想的初衷似乎把交往的环境恶化了,现实的竞争、冲突显然不是一个乌托邦式的浪漫主义的假设的完美情景所能解决的     

基于优化Shapley值的产学研网络型合作利益协调机制研究——以产业技术创新战略联盟为例

随着复杂产品协同研制的兴起,以往的线型化产学研合作模式已难以适应现行的创新活动,正逐渐被网络化模式所替代。这种网络型合作模式还处于起步阶段,在跨组织协同管理、人才集聚、知识有效流动、利益分配等方面存在不少问题。本文以产业技术创新战略联盟为例,基于契约设计理论,研究创新主体在合作过程中的利益协调问题。对Shapley值进行优化,讨论在面对道德风险情况下,如何利用网络协同系数对奖励支付进行协调,以使创新主体利益分配更公平、更合理。同时,将这一协调机制设计进利益分配中,以达到应有的激励目的。     

Accuracy and bias in self-perception of performance: Narcissism matters in Korea as well

Debates regarding the nature of self-enhancement versus accurate self-assessment have been active among psychologists for decades. More recently, researchers have become interested in the panculturality of self-enhancement. Some researchers argue that self-enhancement is universal and present within all cultures. Others declare self-enhancement to be a Western tendency, with self-diminishment being the norm among East Asians. Importantly, the majority of such studies have not compared self-perceptions against objective external criteria, especially those with East Asians. Furthermore, the link between narcissism and self-enhancement has been largely overlooked within Korean samples. To address such gaps, we utilized scores on an objective test as a criterion to investigate the accuracy of Koreans’ self-assessments of performance, as well as how individual differences in narcissism are related to such assessments. A sample of Korean students (N = 146; 71 women) completed self-report measures of narcissism and self-esteem, and took a listening comprehension quiz. Estimated and actual scores were collected and used to compute self-enhancement scores. Results demonstrated that Koreans’ self-perceptions of performance on the quiz were quite accurate. As has been found in Western cultures, narcissism was related to self-enhancement.     

Are Overall Journal Rankings a Good Mapping for Article Quality in Specialty Fields?

Overall journal rankings, which are generated with sample articles in different research fields, are commonly used to measure the research productivity of academic economists. In this article, we investigate a growing concern in the profession that the use of the overall journal rankings to evaluate scholars’ relative research productivity may exhibit a downward bias toward researchers in some specialty fields if their respective field journals are under-ranked in the overall journals rankings. To address this concern, we constructed new journal rankings based on the intellectual influence of research in 8 specialty fields using a sample consisting of 26,401 articles published across 60 economics journals from 1998 to 2007. We made various comparisons between the newly constructed journal rankings in specialty fields and the traditional overall journal ranking. Our results show that the overall journal ranking provides a considerably good mapping for the article quality in specialty fields. Supplementary materials for this article are available online.