创新要素投入产出效率随机变动测度与结果分析

创新要素配置在投入产出两个环节中生成大量不完全技术信息，投入产出效率随机变动更加明显。从投入产出数据集合中提炼共同因子，与不可观测变量构成预测器，建立因子增广向量自回归模型(FAVAR)，分析随机变动方差构成，测度投入产出效率随机变动程度。随机变动效应包括水平效应、稳定性效应和规模效应。投入产出效率自回归扰动项表示随机变动程度，将其细分为共同因子，计算预测器方差及其与投入产出效率的协方差。基于669家上市公司月度、季度、半年度和年度技术研发数据，比较分析投入产出效率随机变动程度及形成原因，引入脉冲响应法分析变量方差构成与变动特征，提出相关政策建议。     

The Benefit of Frequent Corporate Philanthropy

Applying behavioural economic theory, we argue that the frequency of philanthropic activity is important in determining corporate philanthropy's economic outcome. Using Chinese data from 2003 to 2016, we find that firms with more frequent philanthropic activities obtain more government subsidies than firms that only engage in one-off charitable donations. Firms with better corporate governance, such as higher management ownership and more independent directors, are more likely to adopt a strategy of frequent donation. Furthermore, firms are more likely to be frequent donors when management or local government officers have a long tenure. Our findings provide insight into the giving process and suggest that firms can maximize the benefit of corporate philanthropy if they strategically consider the donation frequency and donation amount simultaneously.     

去库存及建筑总量控制政策对三四线城市能源消耗的影响效应研究

近十年来房地产开发迅猛,在满足人们居住需求的同时也伴随着大量泡沫的涌现。中央提出的供给侧改革、去库存和能效提升给建筑部门指明了发展方向,有效地实施供给侧改革是建筑部门一项重要工作。拟通过开展去库存及建筑总量控制对三四线城市能源消耗的影响研究,为建筑部门的供给侧改革提供建议和参考。站在建筑部门宏观视角,通过文献调查,分析总结了建筑终端能耗影响因素及其影响效应,梳理了中国建筑总量、库存量及建筑领域能源消耗量总体情况,论述了三四线城市去库存、进行建筑总量控制的重要性;在此基础上,根据分析结果、三四线城市特点及数据可获得性,选定自变量和因变量及量化指标,运用岭回归方法,以6个城市的数据为例进行三四线城市建筑总量控制、去库存政策对城市能耗影响效果的定量分析;最后基于彼此间关系及研究过程中发现的问题对建筑部门的供给侧改革工作提出建议。     

Does local political support influence financial markets? A study on the impact of job approval ratings of political representatives on local stock returns

Using data on job approval ratings of governors, U.S. senators, and the president, we find that firms located in states with high approval ratings outperform firms located in states with low approval ratings by .64% per month. Furthermore, this relationship is stronger when investors are actively involved in politics, when local politicians are closer to the center of political power, for small firms that have a larger proportion of local investors, and for financially strong areas where investors are ready to execute investments in local stocks. Overall, our study shows that investors’ political sentiment is important in determining stock returns.     

淮扬饮食文化的特点及发展路径探究

淮扬历史文化悠久,塑造了独特的饮食文化,其"精""雅""养"的饮食文化特质,成为中国饮食文化中的独特元素.在新的时代环境之下实现新的发展,这是淮扬饮食文化发展的内在需求.本文立足淮扬饮食文化特点,分析了其发展中面临的问题,并在此基础之上,从推动饮食文化创新、推动饮食产业发展、打造市场品牌影响力、实施"饮食+"措施等方面,阐述了淮扬饮食文化发展的路径.     

社会网络视角下的创客资本研究

揭示创客资本的内涵与特征，有助于深层次挖掘创客与经济社会发展之间的关系。运用关键词共现、社会网络分析和扎根理论方法，对148篇文献、21位由创客与众创空间负责人等构成研究对象的访谈资料和网络文本资料展开分析。社会网络分析发现互联网、数字经济、分享经济等是创客发展的重要驱动力，创客可借助众创空间社会网络跳出时空局限，运用网络资源参与大众创新活动，并与社会网络形成价值共创关系，推动协同创新和平台生态系统构建；扎根理论分析结果表明，创意制造、开放协同、网络共生、边际非稀缺是创客资本的4个核心特征，并印证了社会网络分析结果。基于上述分析结果，进一步基于社会网络理论界定了创客资本的内涵，提出未来需要深度挖掘创客资本与网络场景之间的交互机制及其结果效应。     

Do goodwill impairments affect audit opinions? Evidence from China

There has been a steady growth of goodwill impairments in the Chinese stock market since the adoption of the impairment approach in accounting. The influence of goodwill impairments on a firm’s financial position and profitability give reason to doubt its current and future performance. We examine whether auditors, as a crucial external monitor, identify the information risks of goodwill impairments and express their concerns about financial reporting quality in their audit opinions. Using a sample of firms listed on China’s A-share market from 2007 to 2017, we test the association between goodwill impairments and the type of audit opinion received in the same financial period. Our findings are as follows. First, the probability of receiving a modified opinion increases with the amount of goodwill impairments. Second, the positive association between goodwill impairments and modified audit opinions is driven primarily by earnings management risks. Third, this positive association is more salient when auditors are industry experts and there is no auditor–client mismatch. Fourth, auditors are more sensitive to the amount of goodwill impairments than to their mere existence. Overall, we document that auditors perceive goodwill impairments as a signal of information risks and communicate their concerns to investors to avoid litigation.     

区域配网可靠性提升方案研究

北京市城市副中心地区整体规划定级已实现跃升,为满足更高的可靠性级别,需要对现状配电网开展大量新建、改建工程.针对环网柜、中置柜的设备特点,本文列举出了部分接线形式,分析说明其特点运行注意事项,以供地区配网改造参考.     

深基坑支护技术在房屋建筑施工中的运用策略试析

在我国经济实力不断增强的社会背景下,我国的建筑行业发展十分迅速,在数量、质量上,相较于以往都有了较大的突破.但在实际的施工过程中,由于我国高层建筑数量的逐渐增多,地基的深度逐渐增大,在施工中如果对相关的施工技术没有进行一定的选择,就会对人们后期的使用产生较大的威胁.深基坑支护技术的迅速发展和广泛应用不仅在于它们能够促进我国建筑项目工程施工的有序性和顺利进行,也能充分满足实际的施工服务所需,从而保证我国建筑项目工程的施工整体设计施工服务质量,促进我国建筑工程行业的快速健康稳定发展.     

公路改扩建道路路基加宽施工技术探究

本文结合实际案例,对公路路基扩建加宽的重要性进行分析,然后针对当前改扩建道路路基加宽施工中容易遇到的问题以及一些施工难点进行分析,并对我国公路的路基改扩建加宽施工技术、台阶施工以及路基填料等方面的具体应用进行了分析,期望对提高我国道路建设效果具有一定的借鉴和参考意义.