建设资源节约型和环境友好型社会的度量标准研究——一个分析框架

人均资源不足和环境容量有限,已经使我国不再具备"先发展,后治理"的条件,可持续发展能力的建立,需要从现在开始建设资源节约型和环境友好型社会.文章论证了"两型社会"是在人工和自然双重作用下的资源消耗和生态损耗速率趋近于零的渐进过程.提出了"两型社会"要充分考虑地区经济发展阶段和资源条件有重点的建设,设计了一定阶段下资源和环境消耗的级次标准和动态特征.     

轻资产运营“轻”在哪里

"轻资产运营"模式自提出以来受到全球企业的青睐。然而其"成因"是什么、实现途径有哪些、究竟"轻"在何处等却是人们不能不问的问题。为此本文基于企业实践分别从以小博大、紧扣核心专长、倚重无形资产、品牌引领、客户关系导向、操控产业链等方面进行了解析。从中可一窥轻资产运营的奥妙及其操作要领。     

中国“双向投资”的结构:阶段检验与发展趋势

伴随着经济发展水平的提高,中国"双向投资"的结构发生着阶段性变化。经历了较长期外资流入增幅高于对外投资增幅后,当前中国"双向投资"的结构呈现出对外投资增幅超过外资流入增幅的变化趋势。进一步分析表明,一系列因素正在促使和强化这种趋势的进一步发展。在继续强化外资集聚能力建设的同时,中国应不断提高企业对外投资能力,努力为企业"走出去"提供各项有效的政策与法律支持。     

产业创新的理论综述与发展趋势

产业创新理论是创新理论的一个重要分支,包括产业创新和产业创新系统两大部分。本文阐述了国内外产业创新理论的研究现状,探索了产业创新理论的学科发展方向,并分析了我国产业创新的发展趋势。     

我国欠发达地区农村劳动力的流动与收入：基于性别视角的分析

利用2006年安徽省阜阳市农村外出务工劳动力的抽样调查资料,采用Logistic回归模型,从性别视角对欠发达地区农村外出务工劳动力收入的影响因素进行了实证分析。得出主要结论如下:欠发达地区农村外出务工劳动力收入存在性别差异,男性更易获得高收入;年龄是影响男性农村外出务工劳动者收入的重要因素,但对女性农村外出务工劳动者收入的影响并不显著;性别会影响农村外出务工劳动力进入行业的选择。     

长三角都市圈统一技术市场及其运行机制

在对长三角都市圈16座城市技术交易市场的发展现状进行聚类分析的基础上,指出了长三角都市圈技术交易中存在的主要问题,构建了长三角都市圈统一技术市场结构模型,从交易主体行为制约机制、技术中介组织机制、统一信息系统运行机制和统一市场监管机制等方面对长三角都市圈技术交易市场运行机制进行了初步探讨。     

Overflow effect of credit rating announcements on stock exchange based on event study

This study is aimed to identify the impact of credit rating announcements on the stock returns in stock markets and for this purpose, four different sectors of Pakistan stock exchange were selected and from each of these four sectors, different business organizations were selected, i.e. total 32 business organizations were selected. The credit rating announcement data were collected for these 32 business organizations belonging to four different sectors. Totally 101 credit rating announcements were selected and the time period for which the credit rating warnings were selected include last three years period, i.e. from 2014 to 2016. The collected data were analysed by calculating abnormal returns for each of the selected security and average abnormal returns, and cumulative average abnormal returns were calculated for four different sectors. Event study methodology was applied, and t-test and t-stats value were calculated and results were analysed on the basis of t-statistics. The results of analysis identified that credit rating announcements have a significant impact on stock prices and investors and other market participants are earning abnormal returns during two-day period after the announcements are made. In addition, these abnormal returns were either negative or positive, depending upon the nature of credit ratings announced. If the credit rating announced was upgraded, investors enjoyed positive abnormal returns while in case when credit rating announcements were downgraded, then investors bear negative abnormal returns. Finally, the findings of the study identified the applicability of random walk hypothesis on the Pakistan Stock Exchange and Pakistan Stock Exchange confirms the efficient market hypothesis with its semi-strong form of efficiency.     

中国区域绿色创新效率收敛性研究

将环境污染、创新失败因素列为非期望产出指标,运用2006—2016年中国内地30个省份面板数据,构建SBM—DEA模型对中国绿色创新效率及其区域差异进行测算,进而采用σ收敛模型、绝对β收敛模型、条件β收敛模型考察中国区域绿色创新效率的收敛性。结果表明：中国区域绿色创新效率整体上呈现上升趋势,但存在较大区域差异,东部地区绿色创新效率远高于中、西部地区;全国及东、中、西部地区绿色创新效率均不存在明显的σ收敛,但存在显著的绝对β收敛和条件β收敛,且影响收敛的显著性因素各不相同。     

长江中游城市群知识创新合作网络研究

选取长江中游城市群28个城市作为研究区域,基于2006—2017年区域高水平合著论文构建知识创新合作网络,分析网络特征并探讨网络邻近性作用机制。结果表明：网络规模日趋扩大,联系日趋增强并趋于稳定,基本形成了以长沙、武汉、南昌为核心的多中心网络空间结构,且网络节点具有显著等级层次性。通过特征路径长度和集聚系数分析发现,网络具有小世界特征,但无标度特征不明显。QAP回归结果表明,地理、社会、技术和人力资本邻近都对知识合作网络有显著影响。