Model selection in random effects models for directed graphs using approximated Bayes factors

With the development of an MCMC algorithm, Bayesian model selection for the p ₂ model for directed graphs has become possible. This paper presents an empirical exploration in using approximate Bayes factors for model selection. For a social network of Dutch secondary school pupils from different ethnic backgrounds it is investigated whether pupils report that they receive more emotional support from within their own ethnic group. Approximated Bayes factors seem to work, but considerable margins of error have to be reckoned with.     

农民工的社会网络变迁

采用系统模式研究了进城农民工的社会网络重构过程,指出随着谋生方式由农业生产向非农产业的转移,进城农民工正在逐步建立起以业缘关系为基础的新的社会纽带,并使之成为其社会网络的重要组成部分.这些由进城农民工一手构建的社会关系网络正在成为他们在城市生活中赖以生存和发展的重要资本.     

高科技创业企业社会网络的生成机理与特点分析

本文分析了社会网络的研究现状,指出从经济学与管理学的角度探讨社会网络的必要性;分析了高科技创业企业社会网络的生成机理,界定了高科技创业企业社会网络的内涵,并探讨了高科技创业企业社会网络节约交易成本、分散分摊风险、发挥网络特性等特点。     

三峡外迁移民的社会适应性及其影响因素研究——对江苏227户移民的调查

通过实证调查的资料对三峡外迁移民的社会适应状况作了描述,对影响其社会适应性的因素进行了分析。就总的社会适应性而言,一半以上的移民已基本适应了迁入地的生活。与三峡外迁移民的社会适应状况密切相关的因素主要有搬迁前后经济收入的差异、当地居民的态度、语言适应性、政府关心状况、迁入地治安状况、住房条件的差异。     

论企业的双重属性

本文从企业人、资产、产品、价值、环境等与企业行为相关的五方面较为全面地分析了企业双重属性的内涵,指出企业必须认识到自己所天然具有的社会及经济属性,并以此作为指导企业发展设计和规范企业行为的意识准备。     

Declining Discount Rates: The Long and the Short of it

The last few years have witnessed important advances in our understanding of time preference and social discounting. In particular, several rationales for the use of time-varying social discount rates have emerged. These rationales range from the ad hoc to the formal, with some founded solely in economic theory while others reflect principles of intergenerational equity. While these advances are to be applauded, the practitioner is left with a confusing array of rationales and the sense that almost any discount rate can be justified. This paper draws together these different strands and provides a critical review of past and present contributions to this literature. In addition to this we highlight some of the problems with employing DDRs in the decision-making process, the most pressing of which may be time inconsistency. We clarify their practical implications, and potential pitfalls, of the more credible rationales and argue that some approaches popular in environmental economics literature are ill-conceived. Finally, we illustrate the impact of different approaches by examining global warming and nuclear power investment. This includes an application and extension of Newell and Pizer [‘Discounting the benefits of climate change mitigation : how much do uncertain rates increase valuations?’ Journal of Environmental Economics and Management 46 (2003) 52] to UK interest rate data.     

城市国民经济和社会发展规划战略环境评价研究——以武汉市为例

城市国民经济和社会发展规划编制是否科学．会直接影响到城市其他规划的科学性，对城市未来的发展及生态环境状况影响重大。本文论述了对城市国民经济和社会发展规划开展战略环境评价的必要性和重要性．并结合（《武汉市国民经济和社会发展第十一个五年总体规划纲要》探讨了我国城市国民经济和社会发展规划战略环境评价的技术思路和技术方法。     

企业可持续发展的战略选择：社会责任管理

在经济全球化的背景下 ,社会责任管理是任何一个企业都不能回避的问题 ,它关系到企业的生存和发展。企业应该把社会责任管理作为可持续发展的战略选择 ,并努力构建有效的社会责任管理模式。     

基于社会网络的创业机会、动机与创业精神的关系研究

已有的创业精神的研究多基于西方的经济背景和实践。中国社会的历史文化和转轨时期的经济制度等都反映了中国创业精神发展的特殊性。其于制度理论,提出了创业机会、动机与创业精神之间的关系,并结合中国的创业实践认为,社会网络在创业机会、动机与创业精神的关系中起中介作用。     

构建贫困农村养老保障体系的对策研究——基于河北省涞水县的实证分析

本文通过对涞水县3个乡的12个村、362户居民的入户调查，了解了困扰涞水县贫困农民养老的问题所在，并就贫困农村养老保障进行了对策性探讨，旨在帮助贫困农民解决实际的养老问题，同时也为构建贫困农村养老保障体系提供参考。