个人教育投资的风险收益测度

将教育资本分解成受教育程度和职业的各种组合,借鉴Markowiz的有效投资组合理论,计算Mincer收入方程中扰动项的均值—标准差来衡量投资风险收益,以此建立中国教育投资风险和收益之间的平衡关系,并且利用F检验衡量投资组合的均值方差张成。结果表明,有效的教育资本组合不仅与所接受教育程度有关,还与未来职业选择有关。在以受教育程度为高中和中等职业的基础上,高中(06)可以张成其他全部14个投资组合的均值方差边界。因此,个体和政府在进行教育投资时,都需要全面衡量投资组合的风险收益平衡问题。     

数词非范畴化现象考察

通过句法分布、语义变化、语篇功能及范畴转移等方面考察,数词在非范畴化过程中主要有以下几种表现:句法分布特征的扩展;语义丧失、转指、抽象泛化;语义、语篇功能被强化.非范畴化的结果必然带来范畴转移,而以词汇化或语法化为手段在词汇层面所遗留的痕迹成了这种"转移"最有力的佐证.     

Social innovation and ICT in social services: European experiences compared

Innovation in social services and social policies in the European welfare systems is an evolving phenomenon stimulated by socio-demographic, cultural and economic changes. Many social service innovations are linked to disruptive technologies, especially the introduction of information and communication technology (ICT). To discuss the effects of disruptive technologies on health and social services, this article first proposes a framework consistent with the social innovation paradigm. Secondly, based on case-studies, it investigates different models of social and health service innovation driven by technology. The article shows advantages and disadvantages of service innovation driven by technology, and offers some final remarks about future challenges for ICT in health and social services. More evidences of effectiveness and efficiency are necessary to promote public and private investment to implement solutions on a wider scale. However, the impacts of technology-based solutions cannot be measured only in terms of economic aspects but also taking into account whether new technologies really provide the opportunity for citizens to have a better life and advocacy for their rights.     

Estimation and Inference Procedures for Semiparametric Distribution Models with Varying Linear‐Index

More flexible semiparametric linear‐index regression models are proposed to describe the conditional distribution. Such a model formulation captures varying effects of covariates over the support of a response variable in distribution, offers an alternative perspective on dimension reduction and covers a lot of widely used parametric and semiparameteric regression models. A feasible pseudo likelihood approach, accompanied with a simple and easily implemented algorithm, is further developed for the mixed case with both varying and invariant coefficients. By justifying some theoretical properties on Banach spaces, the uniform consistency and asymptotic Gaussian process of the proposed estimator are also established in this article. In addition, under the monotonicity of distribution in linear‐index, we develop an alternative approach based on maximizing a varying accuracy measure. By virtue of the asymptotic recursion relation for the estimators, some of the achievements in this direction include showing the convergence of the iterative computation procedure and establishing the large sample properties of the resulting estimator. It is noticeable that our theoretical framework is very helpful in constructing confidence bands for the parameters of interest and tests for the hypotheses of various qualitative structures in distribution. Generally, the developed estimation and inference procedures perform quite satisfactorily in the conducted simulations and are demonstrated to be useful in reanalysing data from the Boston house price study and the World Values Survey.     

Golden wedding couples

The implications of retirement for marital and family relationships were explored in golden wedding couples, against a background of those few studies that have so far examined relationships in long-married couples. Older couples can be described in two domains: behavioral and affective. Five activity types are derived from the amount or diversity of shared activities between spouses during a typical day. These types interact with the degree of intimacy measured on two instruments. It was concluded that retirement does not affect intimacy directly, but that it does indirectly through extra time and proximity which provide opportunity for enhancing prevailing intimacy between partners or for magnifying irritations.     

Optimal choice of sample fraction in univariate financial tail index estimation

This study introduces a technique to estimate the Pareto distribution of the stock exchange index by using the maximum-likelihood Hill estimator. Recursive procedures based on the goodness-of-fit statistics are used to determine the optimal threshold fraction of extreme values to be included in tail estimation. These procedures are applied to three indices in the Malaysian stock market which included the consideration of a drastic economic event such as the Asian financial crisis. The empirical results evidenced alternating varying behavior of heavy-tailed distributions in the regimes for both upper and lower tails.     

汉语方言学的现状和愿景

主要内容可分为两大部分:一、讨论最近5年(2000年至2004年)汉语方言学的研究成果,内容包括语音、词汇、语法、地理、历史、方言学史、方言课本、方言比较等方面。二、根据方言学的现状,对汉语方言学研究提出几点建议,并对汉语方言学的发展前途,以及今后五年的发展方向作出预测。     

山谷词系年考证商榷

考证古代文学作品系年的关键在于正确理解作品的原意,然后结合作者的行踪、交游作出合理的推断。近年来,山谷词系年考证中出现了不少分歧,甚至还出现了错误。查阙补漏、修正前说对进一步研究山谷词显得尤为重要。     

On Myopic Stability Concepts for Hedonic Games

We present a unified look at myopic stability concepts for hedonic games, and discuss the status of the existence problems of stable coalition structures. In particular, we show that contractual strictly core stable coalition structures always exist, and present a sufficient condition for the existence of contractually Nash stable coalition structures on the class of separable games. We gratefully acknowledge financial support from the Alexander von Humboldt Foundation (D. Dimitrov)“by “D. Dimitrov gratefully acknowledges financial support from the Alexander von Humboldt Foundation.