基于DEA的经济新区投资绩效评价——以天津滨海新区为例

本文利用数据包络分析(DEA)方法,对经济新区投资绩效进行了综合分析,指出各个非DEA有效决策单元中存在的投入冗余与产出不足并提出了相关结论与建议。     

企业集团投资决策方法的发展趋势

在针对决策方法选择对企业集团投资的重要性上,本文主要阐述了企业集团投资决策方法的发展趋势。企业集团投资决策过程中所遵循的决策准则表现为多元化和核心性,更加突出了决策方法的战略性要求;而未来的企业集团投资决策方法,其主流趋势仍旧是以项目评价为基础。不以现金流量为基础的评价方法完善了传统投资决策方法,而且定性与定量方法相结合的趋势将企业集团投资管理推向了更高的发展阶段,使投资决策方法逐渐地向模拟化发展。     

基于相对竞争力比较的零售企业竞争力评价分析

通过对企业竞争力涵义的分析,构建了零售企业竞争力综合评价指标体系;利用功效系数法和综合评价的方法,通过与同行业其它零售企业竞争力比较和零售企业对自身竞争力评判的方式,建立零售企业的竞争力综合评价模型;使企业能够客观、正确地认识和评价企业自身竞争力,为其进一步提高自己市场竞争力提供科学有效的理论依据。     

IDEF3方法在集装箱码头仿真中的应用

针对Witness仿真过程中经常出现的问题，提出了一种优化仿真设计的建模方法，井结合集装箱码头物流的实际情况进行了说明。建立了集装箱入港物流的模型框架，达到了码头仿真单元的可重构性，大大提高了仿真的速度，并有效地避免了仿真过程中一些难以发现的问题。     

How do economic policy uncertainty and geopolitical risk drive Bitcoin volatility?

We investigate how economic policy uncertainty (EPU) and geopolitical risks (GPR) impact Bitcoin volatility with respect to factors related to type and nationality of uncertainty, investigated period, relationship horizon and extreme conditions. Applying ARDL model and quantile regression for monthly data from August 2010 to September 2021, we reveal that June 2014 corresponds to a key date that marks a reversal in the investigated relationship. Furthermore, we show that the relationship between uncertainty and bitcoin volatility changes according to different factors. US uncertainty has short run effects on Bitcoin volatility, while China’s uncertainty has rather long run effects. Moreover, Bitcoin volatility responds in the same manner to US EPU and GPR, while, it responds differently to China's EPU and GPR. In extreme quantiles, we find that Bitcoin hedges against US EPU and GPR. Further, Bitcoin hedges against either individual or joint effects of US uncertainty, but not both.     

Understanding resource deployment efficiency for ESG and financial performance: A DEA approach

COVID-19 has stimulated additional research interest on economic sustainability and ESG in both academia and industry. This study adopts a DEA approach to examine the efficiency of achieving ESG targets and their relationships with financial performance. Using MSCI ESG data from 2015 to 2019 on 1108 Chinese firms, we examine the ESG proportional and pillar mix efficiencies. The dominant strategies for our sampled firms are to improve overall ESG performance by enhancing the E and S pillars through sacrificing G’s performance. The second result shows a positive relationship between proportional efficiency and financial performance while a mixed relationship between pillar mix efficiency and financial performance. However, for the technology sector, there exists some trade-offs between ESG performance and financial performance. Specifically, relative to non-technology firms, improving proportional and pillar mix efficiencies for technology firms could result in some sacrifice in stock valuation.     

我国社会保障制度的公平与效率选择

社会保障制度是社会经济稳步、持续、高效发展 ,人民生活安定、安全、稳步提高 ,社会政治及其他事业改革能够顺利实施 ,取得成效的基础和保证。任何一个社会要想实现以上目标 ,就必须抓紧、抓好社会保障制度的建立、健全和不断完善。而在社会保障制度的建立过程中 ,必须处理好的关键问题是公平与效率的关系。在社会保障制度的不同层面 ,合理选择公平与效率的侧重点 ,以保证在经济健康发展的条件下 ,人民生活稳定、安全、持续提高     

矿区生态系统健康评价理论与方法初探

总结国内外有关生态系统健康理论与评价方法的研究现状及最新成果,界定矿区生态系统健康的内涵,分析影响矿区生态系统健康的原因,论述矿区生态系统健康评价指标体系与评价方法。     

基于偏离度分析法的江苏省旅游就业潜力预测

当前，旅游业的就业功能受到广泛关注和普遍重视，预测和把握旅游就业潜力对促进一个国家和地区旅游业的发展乃至国民经济的发展意义重大。在借鉴已有相关研究成果的基础上，以江苏省为例，运用偏离度分析法对其旅游就业潜力进行了具体测算，以期对江苏省旅游就业工作的发展有所裨益。     

改革教学方法，培养高质量人才

教师单向灌输式教学方法不利于人才培养，培养高质量人才的有效途径之一是改革教学方法。