中部六省区域物流竞争力实证研究

依托因子分析法,选取中部六省2010年的相关数据,建立评价指标体系,得出中部六省区域物流竞争力的大小排名,研究表明,河南省区域物流竞争力最强,湖北、湖南省居中,安徽、山西和江西省较弱.根据分析结果,对促进中部六省区域物流的发展提出合理的对策建议.     

基于区域经济发展的农产品物流发展研究

立足于区域经济发展角度对当前我国农产品物流存在的问题进行分析,在此基础上借鉴国外经验提出了适合我国农产品物流发展的改进措施.     

Cointegrating rank selection in models with time-varying variance

Reduced rank regression (RRR) models with time varying heterogeneity are considered. Standard information criteria for selecting cointegrating rank are shown to be weakly consistent in semiparametric RRR models in which the errors have general nonparametric short memory components and shifting volatility provided the penalty coefficient _Cn→∞$C_n\to \infty$ and _Cn/n→0$C_n/n\to 0$ as n→∞$n\to \infty$. The AIC criterion is inconsistent and its limit distribution is given. The results extend those in Cheng and Phillips (2009a) and are useful in empirical work where structural breaks or time evolution in the error variances is present. An empirical application to exchange rate data is provided.     

新疆进口贸易影响因素实证分析及发展对策

文章在对新疆外贸进口贸易特点分析的基础上,实证分析了汇率、利用外资和新疆出口贸易额等七个因素对新疆进口贸易的影响,提出了积极发展新疆进料加工贸易、扩大服务贸易进口、建立完善的进口贸易促进体系、加强口岸建设和服务水平等积极扩大新疆进口的政策措施和建议。     

A Note on Allen’s Arc Elasticity with Arithmetic, Geometric and Harmonic Means

Discussion and debate on the application of Allen??s arc elasticity has continued into the 21st century. This note demonstrates three points. First, perceived differences between Allen??s geometric mean elasticity and a constant demand elasticity based on an assumed isoelastic demand curve are negligible for small changes in price and quantity, which comprise the vast majority of such changes. Second, in some cases of rapid security or commodity price movements, the harmonic mean may provide the most accurate elasticity estimates across measures of central tendency. Third, because the arithmetic and harmonic means serve as bounds for the geometric mean, an elasticity based on the geometric mean may be considered a prudent choice among these three on this basis alone.     

我国物联网发展中的瓶颈及应对策略分析

目前"物联网"正从一个概念逐步进入"落地"阶段,但是,纵观我国物联网的发展现状与趋势,令人半喜半忧。物联网行业应用需求广泛,潜在市场规模巨大,政府各部门对发展物联网产业态度积极,这是物联网发展的"喜";"忧"的一面主要表现为在物联网发展初期,存在诸多发展瓶颈因素。文章主要从我国物联网发展中的瓶颈和相应的应对策略进行分析研究,认为必须突破我国物联网发展瓶颈,推动物联网产业健康发展。     

发展中国家之间国际贸易与国际直接投资关系研究——以中国与东盟为例

本文以发展中国家之间的国际贸易与国际直接投资为研究对象,通过对国际贸易与国际直接投资之间关系的综述,结合发展中国家贸易投资的发展过程和趋势,研究发展中国家间国际贸易与国际直接投资的关系,论证了普遍适用的国际贸易与国际直接投资关系的相关理论的确存在于发展中国家之间,并且发现比较优势作为其主要诱发因素,发生于发展中国家的发展前期。最后,选取中国与东盟之间的贸易与投资数据进行实证考察,得出相应的结论。     

合作创新:产学研合作VS企业间合作

通过对北京、上海等地100家中小电子信息企业的调查,发现产学研合作和企业间合作都是企业合作创新的常用模式,那么这两种模式的合作创新绩效是否存在的差异呢?根据中小电子信息企业合作创新的特点建立了评价指标体系的基础上,运用模糊综合评价法对两种模式的创新绩效进行了评价,发现两者的绩效并不存在显著的差异,但两种模式的各绩效指标的评价值存在显著差异,产学研合作对于企业的学习能力的贡献最大,而企业间合作对于产品开发效果的贡献最大。     

Product-destination Portfolio and Dynamics by Firm Ownership and Trade Mode： Evidence from Chinese Industrial Exporters

Using matched firm‐level trade and production data over the period 2000–2006, we study the product‐destination portfolio and dynamics of Chinese industrial exporters and make a thorough comparison among four types of firms and between two kinds of trade modes. We find that ownership structure and trading modes do matter to the destination and product mix choices of Chinese industrial exporters. In particular, foreign firms' exports and processing trade tend to be more destination‐specific and products are more specialized. Therefore, foreign firms are more likely to maintain a particular link within a specific global supply chain.