多维邻近性对校企创新合作绩效的影响研究

在百年未有之大变局的时代背景下,加强校企创新合作、促进科技成果转化是提升国家创新实力、促进国家科技变革的关键。然而,总体上看中国校企创新合作绩效不容乐观,如何提升其整体绩效也就成了亟需解决的问题。多维邻近性作为衡量校企创新合作绩效的常用前置因素,其影响关系也在不断随外界环境的变化而变化。因而文章在理论分析及案例调研的基础上,构建了多维邻近性的内涵维度以及对校企创新合作绩效的影响关系模型,并通过问卷调查等方法结合结构方程对概念模型进行探索验证。结果表明：认知、技术及关系邻近性通过合作信任度和合作依赖度两个中介正向影响校企创新合作绩效,地理邻近性的作用在下降,政府引导支持和技术中介服务在两者之间起的调节作用互补且显著。     

Who votes for public environmental goods in California?: Evidence from a spatial analysis of voting for environmental ballot measures

Voting referenda provide direct evidence of the demand for public goods. A number of previous studies have used referenda to analyze the support for public environmental goods. These studies have used aggregate data from large jurisdictional units (usually counties) and summary income measures such as the mean or median, and have usually found that higher income areas offer greater support for environmental propositions. We examine environmental referenda voting in California using census block group data, spatial dependence controls, and detailed income distribution data. We find that household income has a negative marginal effect on environmental referenda voting for most of the income range when using census block data. In addition, controls for spatial dependence significantly reduce the magnitude of most coefficients. This suggests that OLS estimates of referenda determinants are biased. We also show that county level data may be subject to severe aggregation bias and might not be appropriate for referenda studies.     

亚洲工厂及关联度分析

依据亚洲零部件贸易数据,作者采用了依存比率的方法对亚洲工厂的规模、工厂内部以及同美国之间的相互依存关系进行了研究。研究结果发现,亚洲工厂的规模超过北美洲和欧洲工厂,成为了世界上最大的工厂。亚洲零部件内部贸易额及比重超过了欧盟,这说明亚洲生产的一体化程度更高。从零部件进出口规模角度看,亚洲地区的经济体均高度依赖亚洲工厂的活动,而亚洲工厂对中国的依存度则最高,对日本的依赖程度只排在第三位,这说明中国是亚洲工厂的核心平台。美国在亚洲贸易中的重要性主要体现为中国的最终产品出口对美国市场存在严重依赖,而亚洲主要经济体对中国市场的出口已经超过对美国的出口,亚洲工厂对于美国的依赖程度并不高,远远低于亚洲工厂对中国内地和中国香港的依赖。相反,美国对亚洲工厂的依赖程度则远高于亚洲工厂对美国的依赖。     

市场均衡、效应锁定和控制权拿捏:由我国风电产业生发

对风电产业发展路径依赖效应的研究表明,传统资源模式下对原有经济制度、能源禀赋、传统技术和现有产业结构的路径依赖严重制约我国风电产业的推广和发展。应尽快制定科学、合理的风电产业政策体系,按照市场经济规律的要求,运用法律、财政、税收、信贷等手段调节或影响市场主体的行为,破解我国风电产业发展难题。     

中国东北三省与“一带一路”沿线国家贸易格局时空演变

利用2003年~2017年东北三省与"一带一路"沿线国家进出口贸易数据,采用地理集中度、位序变动指数、综合贸易份额指数、HM指数分析东北三省与沿线国家贸易格局及特征的变化。结果表明:东北三省与"一带一路"沿线国家的贸易往来日益密切,贸易总额大幅增加,尽管东北三省与东北亚地区的贸易份额有所下降,但东北亚地区始终是东北三省的贸易重心。东北三省与沿线国家贸易依赖度不断提高,具有明显的不对称性,表现出显著的单向依赖。从进出口商品结构来看,东北三省向沿线国家出口的资源密集型和劳动密集型商品占比下降,技术密集型商品占比有较大提升,出口商品更加多元化,附加值和科技含量进一步提高,进口商品结构相对稳定,主要为资源密集型和技术密集型商品。     

中国和新加坡商品贸易实证研究

自中国和新加坡建交以来,伴随着两国经济增长,双边贸易有了较大的发展。中新双边贸易强度不断增强,但指数并不高,贸易合作前景广阔。相对而言,中国的比较优势指数不如新加坡,新加坡在双边贸易中略占优势。中新双边贸易主要以产业内贸易为主,这些产业内贸易主要集中在几个少数的产品;中新的产业内贸易并不是基于水平分工的产业内贸易,而是基于垂直分工的产业内贸易。     

论中国经济开放度对促进经济增长的作用

经济开放度是衡量一国经济对外开放程度的综合性指标.经济开放度的度量方法非常多,选择外贸开放度和外资开放度度量中国经济开放度是其方法之一.为了较准确的衡量我国外贸和外资对经济增长的影响效果,通过分析我国改革开放以来外贸和外资的基本情况,发现经济开放度越来越高,在此,进行了原因剖析,最后对经济开放和经济增长进行了简单回归,进而提出了促进中国经济开放对经济增长作用的建议.     

Poverty, Risk Aversion, and Path Dependence in Low-Income Countries: Experimental Evidence from Ethiopia

In most low-income countries, rural households depend on mixed rain-fed agriculture/livestock production, which is very risky. Due to numerous market failures, there are few ways to shift risks to third parties. The literature has focused on what determines the responses of households in such environments. Of special concern are path dependencies in which households experiencing failure are prone to further failure and potential poverty traps. This paper estimates levels and determinants of risk aversion in the highlands of Ethiopia. We find high risk aversion and evidence that constraints have important impacts on risk-averting behavior with perhaps significant implications for long-term poverty. The results also suggest the possibility of path dependence and offer insights into links between risk aversion and poverty traps.     

Unemployment in Greece: Evidence from Greek regions using panel unit root tests

The purpose of the paper is to examine the nature of Greek regional unemployment. The paper contributes to the literature assessing the stochastic properties of Greek unemployment rate in the context of the Greek regions by relying on various univariate and panel unit root tests. In particular, recently developed and more powerful panel unit-root tests that control for structural breaks, heterogeneity and cross-sectional dependence in the panel are employed. The results show that in all cases, after taking into account the fact that regional unemployment rates in Greece are subject to a structural break, the null hypothesis of a unit root is not rejected, indicating that the Greek regional unemployment series are non-stationary with the presence of a structural break.     

不同农地经营权流转方式的空间依赖性分析

研究目的:探究不同农地经营权流转方式的空间依赖性。研究方法:基于2015年省级截面数据,对转包、出租和入股三种农地经营权流转方式进行全局与局部空间自相关检验,结合空间计量模型进一步探讨不同流转方式下空间依赖的机制及强度。研究结果:(1)全局层面,经营权流转空间收敛特征显著,转包和出租方式表现为空间正自相关,入股方式则呈现随机分布特征;(2)局部层面,"高—高"聚集和"低—低"聚集为各省区主要空间聚集模式,热点区域主要分布在中部和东部地区,冷点区域主要分布于中部、东部和西部地区;同一省区、不同流转方式下,空间聚集模式存在显著差异;(3)针对不同流转方式,基于传统最小二乘法回归的残差项检验均拒绝无空间依赖关系的原假设;进一步使用SLM和SARAR空间计量模型展开分析,结果表明,整体层面的经营权流转、转包以及出租等流转方式均存在显著的空间依赖性。研究结论:不同农地流转方式具有经济行为上的空间规律,不应简单地视流转为一个抽象概念,应将具体的流转行为从空间依赖和空间异质层面纳入政策制定过程,更为精准地制定具有区域化与省域化特征的农地流转政策。