当代大学生网络政治参与情况的调查与分析——以江苏高校为例

通过对江苏4所高校1044名在校大学生进行问卷调查和访谈,发现当代大学生网络政治参与具有四大特征:一是大学生网络政治参与具有超越时空的虚拟性;二是大学生网络政治参与内容广泛、渠道多样;三是认知和行为脱节,理性和非理性共存;四是大学生网络政治参与具有双重效应,既能促进大学生政治社会化,影响政府决策,又易导致大学生或参与失度,或远离现实政治,甚至危及政治稳定。因此,必须通过高校教育引导、政府政策调控、个人自我修炼三方协同努力提高大学生政治参与水平和质量。     

银保合作的效率损失研究

由于参与者的有限理性和机会主义倾向,银保合作的意义在于通过激励和监督机制约束参与者,降低不确定性和交易成本。而只有当合作"有效"时,才能在确保各利益群体"无摩擦"的前提下节约交易费用,实现资源利用净收益大于零。虽然在契约关系型银保合作模式的推动下,我国银行保险实现了长达十年的高速扩张,但与此同时诸如手续费虚高、销售误导以及账外激励等无效率的市场乱象屡禁不止,以致市场竞争无序、行业信誉受损。导致银保合作的效率损失原因主要是参与者之间的激励机制设计普遍表现激励有余,约束却不足。在国际经济走势继续低迷和国内监管政策日趋严格的形势面前,推动银行和保险之间的深度层次合作,促进银保合作转型升级,势在必行,时不我待。     

Liquidity risk and stock returns around the world

The recent global financial crisis demonstrates that market liquidity is a prominent systematic risk globally. We find that local liquidity risk, in addition to the local market, value and size factors, demands a systematic premium across stocks in 11 developed markets. This local pricing premium is smaller in countries where the country-level corporate boards are more effective and where there are less insider trading activities. We also discover that global liquidity risk is a significant pricing factor across all developed country market portfolios after controlling for global market, value, and size factors. The contribution of this risk to the return on a country market portfolio is economically and statistically significant within and across regions.     

The performance of frequent acquirers: Evidence from emerging markets

This study examines the returns to 2340 merger deals conducted by 1122 frequent acquirers in 17 emerging markets, during the period 1985 to June 2008. Our primary findings are as follows. Serial acquirers in emerging countries on average experience a declining pattern in returns with subsequent deals, but the pattern is not strong. However, conditional on successful initial deals, the declining pattern is strong for the majority of countries, is large in terms of the magnitude, and is significant in the multivariate regression analysis. We interpret the results as somewhat supportive of the hubris behavior as a factor in serial acquisitions (Roll, J Business 59, 1986). We also find a stronger declining pattern for more developed markets but no substantial difference between civil and common-law countries; the former might be explained by generally greater and increasing competition for control in more developed markets.     

西部十二省市区2002年与2020年全面小康的差距--生活质量主要指标的比较

西部地区2002年的现状与2020年全面小康目标在生活质量方面总体上存在很大差距，12个省市区的综合实现程度都很低。     

科技政策对企业创新的作用机制研究——以广东省为例的实证分析

科技创新是立国之本、强国之路。政府在不同阶段制定相应的科技政策,以求持续激励企业参与创新活动、提高企业核心竞争力、促进产业结构转型升级。基于广东省2005-2017年上市公司数据,采用计数模型实证分析了地级市政府科技政策对企业创新的影响及作用机制。研究表明：科技政策力度越大,越能提高企业的创新水平;科技政策的激励作用主要通过研发强度这一中介变量产生;科技政策不仅能促进企业的策略性创新行为,同时也会导致企业的实质性创新行为;直接激励类型的政策对企业创新并无显著影响,而营造创新氛围的间接激励类型政策则对企业创新有着显著的正向影响;政策激励对非国有企业、非高科技企业的正向作用更加明显。     

银行信贷与中国经济波动:1993-2005

基于1993—2005年的季度数据,本文在一个包含银行部门的动态随机一般均衡模型中,讨论了银行信贷和中国经济波动的关系。模拟结果和实际数据的对比表明,引入银行贷款渠道和价格粘性的经济周期模型对中国经济波动有很好的解释力。脉冲响应和方差分解的结果表明:(1)技术冲击解释了大部分产出、投资以及长期消费的波动;(2)信贷冲击解释了大部分短期消费、贷款以及货币余额的波动,对产出、投资的波动有一定解释力;(3)货币需求冲击影响不显著,仅对通货膨胀、贷款以及货币余额波动有一定的解释力;(4)货币政策冲击解释了通货膨胀的大部分波动。     

应用于雷达方位超分辨的改进Richardson-Lucy算法

方位超分辨是国内外雷达界持续探索的一项技术难题。为解决高斯噪声情况下天线低通效应造成的方位低分辨力问题,利用基于泊松噪声情况下Richardson-Lucy(RL)算法对其进行研究。针对RL算法中高斯噪声被放大出现虚假目标和RL算法收敛速度慢的缺点,提出了一种改进RL算法。该算法首先使用低通滤波去除高频段的噪声,然后利用加速RL算法进行方位超分辨。仿真结果表明：与原RL算法相比,改进RL算法能降低高斯噪声的影响,消除虚假目标;在信噪比低至0 dB时,相对于半功率波束宽度,改进RL算法的最大分辩倍数为1.8倍,与维纳逆滤波算法相比具有较强的噪声适应能力,可以应用于雷达方位超分辨。     

A comparison of Ad valorem and per unit taxes in regulated monopolies

This paper compares the output and revenue effects in the rate-of-return regulated monopoly model. Both the ad valorem and the unit tax generally decrease the use of capital, and as such, reduce the output and raise the price. In addition, it is shown that Suits and Musgrave's conclusion of higher revenue of an ad valorem tax at a given output can apply to a regulated monopolist if the marginal product of labor under the ad valorem tax is greater than or equal to that under the unit tax. Similarly, their second conclusion, that for a given tax revenue an ad valorem tax has a larger output than a unit tax rate before the revenue-maximizing tax rate, can also apply to the regulated monopolist.     

车险电销客户投保体验迫切改进点的数据挖掘

本文旨在从车险电话销售客户体验调研数据中寻找到车险电话销售客户投保体验的最迫切改进点,以期用较低的成本投入有效地提高车险电话销售成功率和产能。使用SPSS MODELER数据挖掘软件,遵从CRISP—DM数据挖掘方法论,对调研数据进行数据挖掘,得到车险电话销售客户体验最迫切的改进点,并相应提出改进的政策建议。政策建议包...