外资银行进入对上海银行业经营影响的实证研究

本文研究了外资银行对于在上海经营的国内银行的影响。发现外资银行促进了国内银行资产利润率的提升和贷款损失准备金的提取,对上海银行业的人民币业务没有显著影响,而对外汇业务份额有较为显著的负向影响。国内银行应不断提高风险管理水平、业务的综合化和国际化水平,监管机构应努力促进中国金融市场的竞争性,促进商业银行经营效率的提升。上海应继续以优惠政策吸引外资银行的进入,促进国际金融中心建设。     

中国工业企业动态演化效率研究：所有制视角

不同所有制企业陆续进入、退出市场以及在市场中展开竞争,是中国渐进式改革在企业层面的一个重要特征。本文借助中国工业企业数据库(1998~2007年),在VDF总量生产率增长分解框架下,测度了不同所有制企业的动态演进效率。研究发现国有企业在总量上的效率贡献最大,民营企业在增量上的效率贡献则最大。经济总量上,内部效率提升环节对总量生产率贡献最大,而增量上,退出环节对总量生产率贡献最大,表明中国经济已经走上了一条内生增长、创新驱动与优胜劣汰的发展道路。进入环节无论在何种情况下效率贡献均为负,说明中国依然是一个进入门槛较高的国家。不同所有制企业对总量生产率的贡献与企业生命周期有关。本文对澄清我国企业改革的所有制误区,推进混合所有制经济改革与寻找经济增长新动力有着重要的理论价值与现实意义。     

技术差距视角下我国不同性质企业创新效率研究

本文利用共同前沿理论和DEA模型测算分析2005~2010年我国不同性质企业技术创新效率差异、损失来源以及影响机制。结果表明：考察期内我国企业创新效率整体水平偏低,还有42.1%的提升空间,纯技术效率和规模效率均不高。共同前沿下效率值均不超过群组前沿下效率值,TGR值显示,外资、港澳台资与内资企业的技术差距均位于0.2~0.4,且存在差距继续扩大的风险。不同性质企业效率损失根源存在显著差异,港澳台资和外资企业效率缺失主要受制于落后的企业管理水平;内资企业则因生产技术差距和管理不当所造成的效率损失均占有一定比例。企业性质、企业规模、市场竞争程度和政府金融支持对效率提升具有积极影响,企业规模在政府金融支持与效率关系中起负向调节作用。     

Adaptive market efficiency of agricultural commodity futures contracts

In this paper we investigate the adaptive market efficiency of the agricultural commodity futures market, using a sample of eight futures contracts. Using a battery of nonlinear tests, we uncover the nonlinear serial dependence in the returns series. We run the Hinich portmanteau bicorrelation test to uncover the moments in which the nonlinear serial dependence, and therefore adaptive market efficiency, occurs for our sample.     

Evaluating the efficiency and productivity change within government subsidy recipients of a national technology innovation research and development program

This study analyzes the efficiency and productivity change within government subsidy recipients of a national technology innovation research and development (R&D) program. We examine 6,990 government‐sponsored, completed R&D projects during the last three performance follow‐up survey years from 2010 to 2012, and present a design of the sample of panel data to cope with the typical R&D performance time lag using a set of massive observations associated with completed R&D projects for the past 7 years from 2005 to 2011. In particular, data envelopment analysis is adopted to measure the efficiency and productivity change, which is measured in the Malmquist index. Parametric and nonparametric statistical tests are carried out to check for statistically significant differences among the characteristics regarding the types of government subsidy recipients. This study's major findings are as follows. First, during the entire period analyzed (2010–2012), there was a similar yearly pattern of statistically significant differences in the government subsidy means among the recipient types. In contrast, there were no obviously equivalent differences in the efficiency and productivity change. Second, the productivity had increased year on year, but the increments were reduced from year to year. Third, the productivity change was induced mainly by the Frontier‐shift, which indicates overall technology innovation progress, compared with the Catch‐up, which only indicates a simple increase in the efficiency. In particular, in this empirical analysis, the recipient types of ‘national laboratory’ and ‘large company’ had relatively larger sizes of government subsidies per project. However, the efficiency and productivity change of these types was not better than the others. This implies, therefore, that the government should control the ratio of the subsidy to the total R&D budget with an appropriate upper limit.

• I empirically evaluate the productivity change within a national technology innovation R&D program.
• I design a sample of panel data to cope with the typical R&D performance time lag using massive observations.
• There is no obvious relationship between the government subsidy size and R&D productivity change.
• Some particular types of government subsidy recipient are inferior in terms of R&D productivity change.
• It practically implies that the government should control the ratio of the subsidy to the total R&D budget.

     

自适应无线传输技术在高速下行数据分组接入中的应用

随着高速、多媒体数据业务需求的日益增长 ,未来无线移动通信系统越来越需要解决支持更高速数据传输技术及频带利用率的问题 ,自适应传输技术是提高频带利用率的有效手段。结合最新3GPP提出的高速下行数据分组接入HSDPA ,归纳、总结和分析了自适应无线传输技术在HSDPA的应用以及其优点和应用前景、未来的研究方向     

金融中介发展对中国技术效率影响的实证分析

本文运用随机前沿技术实证分析了金融中介发展对我国技术效率的具体影响。分析结果指出,金融中介发展对于我国技术效率的影响具有明显的区域差异特性。在东部地区,金融中介发展有利于技术效率的增长;但从全国范围来看,这种积极作用发生了逆向变化。     

我国粮食对外贸易中的一个“悖论”及其成因探析

按照比较优势理论,我国应净进口粮食这一土地密集型产品。但本文在实证分析后却发现,1997年以来我国已经成为粮食产品的净出口国。粮食产品较低的“可贸易度”制约了市场机制及比较优势作用的发挥。但从中长期来看,粮食产品的“可贸易度”会呈上升态势,发挥国内外“两个市场”的作用对增强我国粮食安全保障具有重要意义。     

论服务业在国民经济中的"黏合剂"作用

服务业在国民经济中的地位不断上升,已不再是"边缘化的或奢侈的经济活动",而是位于经济的核心地带.服务业在国民经济中的突出作用表现在它具有"黏合剂"的功能,也正因为这一功能使之成为经济增长和效率提高的助推器、经济竞争力提升的牵引力、经济变革与经济全球化的催化剂.切实培育与发挥服务业的经济牵引力、产业整合力与国际竞争力,有助于更好地推进我国的产业结构优化升级,形成以制造业为支撑、服务业全面发展的产业格局,增强服务贸易和商品贸易的国际竞争力,促进我国国民经济持续快速健康协调发展.     

国有商业银行改革过程中的经营效率评价

效率是衡量银行资源配置和经营成效的重要指标,效率分析可以从定量的角度评价我国国有商业银行在改革过程中的经营水平和改革成效.本文采用非参数分析的数据包络分析方法DEA,使用C2R模型对我国国有商业银行进行了两组DEA分析.分析结果显示,我国国有商业银行改革有一定的成效,但阶段性非常明显,突出表现在1994-1997年和2003-2004年.改革过程中的银行经营效率与政府的政策推动和扶持有相当紧密的关系.