中国-东盟自由贸易区产业内贸易结构分析

本文运用GL指数测算中国-东盟自由贸易区的产业内贸易发展广度和深度。认为中国-东盟自由贸易区的建立加深了双边产业内贸易的规模,尤其是工业制成品的产业内贸易规模发展较为明显,同时战略性初级产品和政策鼓励的深加工工业制成品的产业内贸易程度最高,而单一一方具有较强比较优势的产品,其产业内贸易呈现下降的趋势。由此得出结论,中国与东盟国家应当善用自由贸易区的形式,扩大产业内贸易,这是符合双方共同利益的政策选择。     

教学改革背景下学生评教指标的实证研究

本文通过问卷调查及统计分析的手段,建立起一套在工学结合教学改革新背景下适合的学生评教指标体系．并经实际应用证实,新评教量表具有较好的信度与效度。     

2010—2014年南京市卫生资源配置公平性分析

目的:分析南京市卫生资源配置(health resowrce all ocation,HRA)的公平性。方法:运用泰尔指数方法对2010—2014年南京市各项卫生资源数据进行分析,评估卫生资源按照常住人口配置的状况和公平性。结果:卫生机构和床位配置的总泰尔指数呈先降后升趋势,区域间指数较高但缓慢下降,主城内部指数较高且无明显改善,江北、宁南内部指数呈下降趋势。卫技人员、执业医师和注册护士的总泰尔指数持续下降;区域间指数和主城内部指数始终较高,江北和宁南内部指数持续下降。各项HRA区域间差异和主城内部差异对总泰尔指数的贡献率均较高。结论:2010—2014年南京市HRA公平性逐渐增强;城市规划调整促进了卫生机构建设,但可能导致HRA公平性下降;卫生人力资源配置的公平性相对较差;区域间及主城内部差异是导致南京市HRA不公平的主要原因。     

中美两国价格水平差异的比较研究

基于两种不同类型商品和服务价格数据,研究测算出中美两国价格水平差异程度有所不同。非参数检验和非相似度指数研究表明,对代表性商品而言,中国价格水平低,与美国有显著差异;对同质可比商品而言,中国价格水平接近于美国,部分商品价格甚至高于美国。中美两国价格水平差异总体呈缩小趋势。研究发现,人民币汇价对两国价格水平差异具有一定的传导弹性作用,并且人民币升值的传导作用要大于人民币贬值的传导作用。     

A new local estimation method for single index models for longitudinal data

Single index models are natural extensions of linear models and overcome the so-called curse of dimensionality. They are very useful for longitudinal data analysis. In this paper, we develop a new efficient estimation procedure for single index models with longitudinal data, based on Cholesky decomposition and local linear smoothing method. Asymptotic normality for the proposed estimators of both the parametric and nonparametric parts will be established. Monte Carlo simulation studies show excellent finite sample performance. Furthermore, we illustrate our methods with a real data example.     

A study of the operation efficiency and cost performance indices of power-supply companies in China based on a dynamic network slacks-based measure model

This paper applies the dynamic network slacks-based measure model with free links and fixed links (hereafter referred to as DNSBM-Free and DNSBM-Fixed respectively) to evaluate the operational performance of 31 electric power-supply companies (hereafter referred to as EPCs) in China from 2010 to 2012. This approach allows for the consideration of the group heterogeneity of electric power transmission. This approach also considers the new structural reform in the power grid of China in the near future, i.e., the separation of the transmission division (hereafter referred to as T) and the distribution division (hereafter referred to as D). We extend several performance indices to measure the cost efficiency and technology gaps in electric power supply. We estimate the efficiencies of the EPCs under different policies. The results indicate that regional economic development level has a significant impact on the performance of the EPCs. Under the DNSBM-Free and DNSBM-Fixed models, while the efficiency of D was a slightly higher than that of T before separating T and D, however, the efficiency of D was significantly lower than that of T after separation. Conversely, divisional efficiencies of some companies show a significant gap between T and D. This suggests that policy-makers should seriously balance the pros and cons of separation policy before making decisions, and the EPCs in China focus on enhancing operating efficiency of D when deciding to separate T and D in the future. Furthermore, this paper speculates that the macro-economic environment influences the policy of separation of T and D.     

新常态下江淮城市群发展水平及其驱动因素研究

采用2000-2013年间面板数据,以江淮城市群为研究对象,测度其14年间的发展水平.在此基础上建立基于城市效应和时间效应的双向固定效应模型,分析江淮城市群发展的驱动因素.研究发现:科技创新、对外开放、制度因素、人文环境、基础设施要素对江淮城市群发展有正向驱动作用,而产业结构、企业因素、阶段性政府决策、人才培养要素对江淮城市群发展的贡献度有待进一步提升.据此提出对策建议:提高科技创新驱动能力,促进产业集约式发展;加大人才培养力度,提升对外开放水平;拓宽民营资本发展领域,优化中小企业投融资环境;完善基础设施建设,营造城乡人文环境,提升区域决策能力.     

图们江地区经济社会与生态环境协调发展水平评价

建立图们江地区经济社会与生态环境协调发展水平评价模型,提出用协调发展指数评价图们江地区经济社会与生态环境协调发展水平。研究结果表明,图们江地区经济社会与生态环境协调发展指数从2002年的0.3714提高到2012年的0.5949,其协调发展水平从2002年的4级提高到2012年的6级,即由轻度失调发展水平提高到勉强协调发展水平,协调发展水平较低。建议加强产业结构优化升级、促进人口健康均衡发展、发展生态资源可持续利用以及加强环境治理力度,来提高区域经济社会与生态环境协调发展水平。     

A Multiple-community Overlap Measure Based on a Probabilistic Approach

Species diversity indices are designed to measure the species diversity of a community and to compare the species distribution structure of two communities. The Shannon and Simpson indices are for describing one community, and the Jaccard and Morisita indices are for comparing two communities. Only a few indices allow the simultaneous comparison of three or more communities. In this study, we propose a multiple-community similarity index based on a probabilistic approach, and compare it with other multiple-community indices. Empirical examples are considered as a demonstration of the proposed similarity indices.     

Adaptive PORT–MVRB estimation: an empirical comparison of two heuristic algorithms

In this article, we deal with an empirical comparison of two data-driven heuristic procedures of estimation of a positive extreme value index (EVI), working thus with heavy right tails. The semi-parametric EVI-estimators under consideration, the so-called peaks over random threshold (PORT)–minimum-variance reduced-bias (MVRB) EVI-estimators, are location and scale-invariant estimators, based on the PORT methodology applied to second-order MVRB EVI-estimators. Trivial adaptations of these algorithms make them work for a similar estimation of other parameters of extreme events, such as the Value-at-Risk at a level p, the expected shortfall and the probability of exceedance of a high level x, among others. Applications to simulated data sets and to real data sets in the field of finance are provided.