Long Window Tests of China＇s Stock Market Efficiency in Different Sectors around the Disclosure of Annual Report

10 stock sectors are selected in Shanghai and Shenzhen stock market＇s as samples. By event study, the change of stock＇s cumulative abnormal return rate around the data of annual report disclosure was analyzed among the year 2004-2008. The market reaction pattern of such kind of news was summarized in order to test the efficiency of China＇s stock market and its trend before and after the comprehensive completion of the Share-trading Reform and the imple- mentation of new Accounting Standards. The conclusion is that Chinese stock markets response more accurately to ROE and EPS; its efficiency continued to decline in 2005 and 2006, but there was a gradual increase in 2007 and in 2008; and in general the capital market do not reach the semi-strong efficiency, but the machinery industry and biopharmaceutical industry have done.     

市场操纵降低了中国股票市场的信息效率吗——来自沪市A股高频交易数据的经验证据

本文以尾市交易操纵为研究对象,尝试对中国股票市场可疑的尾市操纵行为进行识别与监测,并基于监测结果实证分析市场操纵如何影响市场信息效率。具体来看,本文利用沪市A股2013-2018年的日内高频交易数据,基于股票尾市交易相关指标异常变化特征,构建了尾市交易操纵识别模型,实证检验了市场操纵对信息效率的影响。研究结果表明,市场操纵对信息效率存在不利影响,市场操纵后股票流动性和股票波动性的异常变化是影响信息效率的关键传导路径,上述结论在考虑内生性问题后依然稳健。此外,研究还发现,国有企业、上市公司信息披露质量较高的情形下,市场操纵对信息效率不利影响程度较小。     

我国农药制造业生产率增长的实证分析——基于DEA的Malmquist指数法

为探寻提高我国农药制造业生产效率的途径,运用DEA的Malmquist指数方法,从整体趋势和各省区角度定量考察了我国农药制造业增长过程中全要素生产率的增长状况,结果表明:从全国的平均时间序列数据来看,我国农药制造业全要素生产率是在波动中增长,全要素生产率的增长主要是技术进步的贡献,而制约技术效率改善的主要原因是规模效率的下降.所研究的全国二十八个地区,生产率基本上都得到了不同程度的增长,只有云南地区有所下降.就全国而言,农药增长的主要推动力量来自于农药生产率的提高.从动态演变来看,农药全要素生产率增长在农药增长中的作用日渐增强.     

中国服务业技术效率区域差异的实证分析

本文借助随机前沿生产函数模型,使用面板数据,分析了我国服务业技术效率的区域差异及其对劳均服务业增加值区域不均衡的影响。研究表明,东、中、西部服务业技术效率存在显著差异,这加剧了我国服务业区域发展失衡现象。我国各省以及东中西三大地区的服务业技术效率之所以不均衡,关键原因在于其市场化进程不一致。最后,文章据此提出了缩短地区服务业发展差距的政策措施。     

区域“大众创业，万众创新”效率评价

以中国内地31个省（市）数据为基础,以“大众创业,万众创新”（简称“双创”）的本质及特征为依据,构建了一套区域“双创”效率评价指标体系。运用三阶段DEA方法,在控制环境因素的基础上考察了各地区“双创”投入产出转化效率。研究显示,目前各区域“双创”效率发展不均衡,规模效率和纯技术效率除个别地区达到1以外,其它地区都存在不同程度的效率缺损。最后,根据规模效率和纯技术效率大小,对31个省市的“双创”效率进行四分图归纳,根据归纳结果提出了相应的解决措施,可为“双创”可持续发展提供参考依据。     

Resource-envy-free and efficient allocations: A new solution for production economies with dedicated factors

I consider the problem of determining an equitable and efficient allocation of resources in production economies with factors which must be dedicated to production and cannot be consumed directly. First, I show that in such economies envy-free and efficient allocations exist under standard assumptions. However, I argue this notion of fairness is unsuitable for the present context. I then introduce a new notion of fairness, which I call resource-envy-freeness. First, I associate with each consumption bundle its resource footprint consisting of the vector of factors used to produce it. I then show that preferences over consumption bundles can be extended to preferences over factor bundles. An allocation is resource-envy-free if no agent prefers another agent’s resource footprint to its own. The analysis of resource-envy-free allocations in production is exactly analogous to the analysis of envy-free allocations in exchange. I establish that resource-envy-free and efficient allocations exist under standard assumptions, and I demonstrate that such allocations are intuitively appealing.     

Farsighted strategies in the formation of a communication network

I examine the formation of a specific communication network, a variant of the two-way flow model, in which agents have farsighted strategies. I show that the likelihood to form efficient networks tends to zero for sufficiently large network sizes.     

融资渠道与中国区域技术创新

运用2011-2016年中国内地31个省份面板数据,通过固定效应模型检验不同融资渠道对全国以及东中西部地区技术创新的影响。结果表明：①债权融资在整体上对技术创新影响不显著,分地区看,其在东部地区发挥了促进作用,而在中西部地区则起到抑制作用;②从整体及中西部地区看,股权融资对技术创新的影响不显著,且抑制了东部地区技术创新;③对股市板块进行细分后,整体上股权融资中只有创业板股权融资显著促进了技术创新水平提升,主板和中小板的作用均不显著。     

Efficiency in the provision of social care for older people. A three-stage Data Envelopment Analysis using self-reported quality of life

Using a three-stage data envelopment analysis approach, this paper explores efficiency in the provision of social care for older people in 148 English Councils in 2009/10. Departing from D'Amico and Fernández (2012) [31] our measure of efficiency is inscribed within the production of welfare framework and based on self-reported quality of life of recipients of the services. Our results indicate a high level of efficiency, but once we control for the effects of a number of environmental variables, we found that more stringent eligibility criteria and higher assessment costs are negatively associated with the efficiency in the provision of social services.     

国家科技重大专项财政支持效率评价

在相关文献的基础上,选取财政支持效率评价作为突破口,研究了我国科技重大专项管理路径。分析重大专项财政投入现状发现,资金使用情况良好,支出结构基本合理,多元化投入机制逐渐建立,管理制度基本建立。同时,通过DEA和Malmquist模型评估了决策单元的综合效率值和动态效率值,结果表明,财政支持重大专项发展过程中的资源配置效率并没有实现最优。但是,通过技术创新、资源配置、规模效率等途径优化重大专项管理的效果已初步显现。效率较为低下的表象为科研活动价值补偿不足,制约因素包括：事权缺乏清晰界定且事权与支出责任不匹配、组织管理体制有待完善、实施模式缺乏清晰判断。最后,提出了建议,包括不断完善重大专项财政投入及其管理、匹配科技重大专项事权与支出责任、健全重大专项实施机制、优化管理架构。