论老年活动策划与组织原则

研究老年活动的分类及作用,阐述老年活动策划与组织的伦理和实务原则,有利于宣传老年活动理念,倡导全社会广泛开展丰富多彩的老年活动,从而形成社会关爱老年人、老年人关爱自身的健康生活方式和社会互动模式。     

基于供应商关系的供应链企业采购策略研究

从供应链的角度,整体考虑供应链的利益,分析供应链企业采购存在的问题,基于支出分析法,运用供应商分类矩阵,对供应商进行分类,得出不同供应商管理策略组合。在分析供应链企业采购理念及采购策略的基础上,对供应商的关系进行定位,从而对不同关系的供应商采用不同的采购管理策略。     

基于熵权模糊综合评价的军用车辆器材库存分类研究

根据军用车辆器材库存分类评价所存在的模糊性,提出车辆器材库存分类评价指标体系。构建模糊综合评价模型,采用熵权与主观权重相结合的方法确定评价指标权重,避免了传统评价模型主观赋权的局限性。在实际评价中,取得了较为满意的效果。     

Local equilibrium equivalence in probabilistic voting models

Electoral equilibria depend upon candidates' motivations. Maximization of expected vote share may not lead to the same behavior as maximization of the probability of winning the election. Accordingly, it is desirable to understand when electoral equilibria are insensitive to the choice of candidate motivations. This paper examines sufficient conditions for local equilibrium equivalence between expected vote share maximization and maximization of probability of victory in the spatial model of elections with probabilistic voters.     

How much have been the export products changed from homogeneous to differentiated? Evidence from China, Japan, and Korea

Many international trade theories and evidence suggest that trade in homogeneous and differentiated goods is different, and trade performance depends significantly on the extent of product differentiation. First this paper classifies the three countries' export products using Rauch's [Rauch, J. (1999). Networks versus markets in international trade. Journal of International Economics, 48, 7–35] classification scheme. This paper suggests a sophisticated technique to obtain the extent of product differentiation in a country's export, implied by Dixit and Stiglitz [Dixit, A., & Stiglitz, J. (1977). Monopolistic competition and optimum product variety. The American Economic Review, 67, 297–308] model in which the smaller is the elasticity of substitution between varieties the greater is the extent of product differentiation. This is an attempt to identify the extent of product differentiation in each country's export basket by estimates of the elasticity of substitution. The estimated elasticities of substitution vary across countries. The most interesting empirical finding is that the China's export structure has been rapidly shaped into differentiated products. However the extent of product differentiation in Japan and Korea's exports has relatively less varied.     

International foreign exchange agreements and nominal exchange rate volatility: a GARCH application

For eight major national currencies, this study estimates, and tests several hypotheses with, a t-distribution GARCH model of daily spot nominal exchange rate changes. The sample period covered is June 1, 1982 through September 30, 1992. By using likelihood ratio and parameter stability tests, it finds that for most of the currencies considered, both the conditional means and variances of unexpected exchange rate changes experienced statistically significant structural breaks across the five subperiods that are associated with four episodes of international foreign-exchange policy coordination. The study also finds that the orderings of the GARCH-estimated unconditional standard deviations roughly match the orderings of the sample standard deviations across the five subperiods. An explanation is provided for what underlying factors contributed to these structural shifts.     

Implementation of stable solutions in a restricted matching market

I analyze the admission mechanism used in Spanish universities. The system is open to strategic manipulation. This is because students are not allowed to express the whole list of available options. However, the mechanism implements the set of stable matchings in Nash equilibrium and the student's optimum in strong equilibrium. The mechanism also implements the students' optimum, in Nash equilibrium, under the class of “non-reverse” preferences. All these properties come from the fact that colleges do not have the opportunity to misrepresent their preferences. Received: 30 June 1995 / Accepted: 31 January 1997     

Designs for Variance Components Estimation: Past and Present

This article provides (1) a comprehensive coverage of the literature on designs for estimating variance components, and (2) a review of recent applications of such designs in genetics, statistical process control, and quality improvement. In addition, recent methods of estimation of variance components and model forms, other than the linear, are discussed. The latter developments have a direct effect on the choice of design. Some suggested ideas for future research directions are also given.     

Growth,fertility and human capital: A survey

This paper surveys recent work on endogenous fertility and endogenous growth. These models provide the building blocks for a theory of development. They are capable of explaining income and fertility differentials between rich and poor countries. They can produce switching behavior, countries that transform themselves from no growth economies into high growth economies. The fertility and growth effects of social security programs are also examined. Finally models with increasing returns to population are presented. They are capable of reproducing very long term relationships between human capital, fertility and economic growth.     

网络用户隐私关心问题研究

网络的出现在给人们的生活带来极大便利的同时也引起了网络用户对自身隐私信息的关心。为此采用问卷调查的方式,利用统计分析和关联分类技术,对网络用户所关心的隐私信息及其关心程度进行研究。由调查结果发现,虽然中国网络用户对自身隐私信息的关心程度不断提高,但整体来说仍然较低,用户对自身各类隐私信息的关心程度存在较大差异,且用户对各类隐私信息中的各项具体信息的关心程度随着用户年龄、性别、学历的差异而有所不同。调查结果为电子商务网站更好地保护用户的隐私信息提供了依据。