对我国外贸"贫困化增长"的再分析

本文根据"贫困化增长"的前提条件,对我国外贸是否存在贫困化增长进行了探索,得出了我国并不存在贫困化增长的现象,最后根据我国现阶段的具体情况,提出了一些防范出现贫困化增长的措施.     

资产组合风险度量与选择之文献述评

根据资产组合理论的本质,理解和掌握资产组合理论具有重要的意义。本文主要从风险度量方法比较、现实金融资产收益的实际分布与相关性、以及金融资产收益的动态变化特征等角度,对资产组合风险度量与选择的相关文献进行回顾与评述。     

基于密度依赖模型的组织出生和组织死亡同向变动研究

经典密度依赖理论认为：在同一时间段,组织的出生率和死亡率会呈现反向变动的趋势。文章观察到了组织出生率和死亡率同向变动的现象。从密度依赖模型的出生率和死亡率函数出发,文章先从理论上推导组织设立和组织死亡同向变动的条件,再结合实际观察到的1993年-2017年广州市外资制造业企业出生和死亡现象展开讨论。结果发现：（1）当组织死亡率大于0,组织设立率小于0时,如果t时刻的密度小于出生率函数的密度系数除以两倍密度平方值系数的负数;组织年龄为u时的组织密度又大于死亡率函数的密度系数除以两倍密度平方值系数,就会出现组织死亡函数增长时,组织设立函数同时增加的现象;（2）1993年-2017年广州市外资制造业组织设立和组织死亡函数的变化趋势大致相同,也与文章理论上的数学推导大体保持一致;（3）组织死亡率、组织出生率和组织密度形成一定组合时,组织设立函数和组织死亡函数并不呈现反向关系,反而会出现同时增加或者同时减少的同向变动现象。     

中国家庭长期多维贫困状态转化及教育因素研究

研究目标：分析教育因素对长期多维贫困的影响。研究方法：结合Foster（2009）持续时间分析法和A-F双界线法构建了长期多维贫困指数,并选取混合效应回归模型、明瑟收入方程及其改进形式,重点分析家庭教育因素对长期多维贫困的影响。研究发现：教育已经成为长期多维贫困的主要贡献因素,其贡献度随着贫困持续时间的增加而增加。教育水平不同导致教育回报率差异进而影响贫困家庭贫困剥夺深度和贫困持续时间差异,并且高中及以上学历的教育回报率呈明显递增趋势。研究创新：将多维贫困在静态时点上的测度拓展到跨期的动态测度,并从微观家庭所在社区（村）拥有的教育资源和各级教育回报率差异等方面剖析了家庭陷入长期多维贫困的原因。研究价值：为构建长期多维贫困指数和促进“精准扶贫、精准脱贫”提供理论参考。     

专利保护期限设置的技术经济分析

专利保护制度能激励企业在技术研发上进行投入，这有利于增加社会总剩余；然而，专利保护制度在提供激励的同时，也造成了潜在效率的损失。专利保护期限的设置是这二者之间权衡的结果。本文通过一个两阶段博弈的分析框架，利用动态的局部均衡权衡模型，从企业利润最大化和社会总剩余最大化的相互作用中，推导出了社会最优的专利保护期限。在我们的动态的局部均衡权衡模型中，创新者的研发投入水平是专利保护制度的内生产物。     

Statistical efficiency in the linear combination of forecasts

In seeking an efficient combination of forecasts which minimises the forecast error variance, many methods have been suggested. Through analysis, simulation and case studies, this paper seeks to develop insights into the statistical circumstances which influence the relative accuracy of six of these methods. The six methods chosen have all been advocated in various publications and consist of ‘equal weighting’ (i.e., pooled average), ‘optimal’ (i.e., error variance minimising), ‘optimal with independence assumption’ (i.e., error variance minimising assuming zero correlation between individual forecast errors) and three variations on the formulation of a Bayesian combination based upon posterior probabilities. The statistical circumstances reflected varying conditions of relative forecast errors, error correlations and outliers.     

基于两型社会要求的武汉绿色物流发展研究

纵观国内外经济发达的地区和国家,无一例外,都是把高效环保的现代化物流作为经济发展的生命线。作为中部最为重要的城市圈之一:武汉城市圈也应基于两型社会要求向绿色物流进军。     

中国股市收益率波动实证研究--基于自回归条件持续性模型

结合高频数据和自回归条件持续性(ACD)模型进行的研究表明:在中国市场,自回归条件持续性模型可以成功用来衡量交易到达的强度.最后展望了该模型的发展方向.     

Multiple-Category Decision-Making: Review and Synthesis

In many purchase environments, consumers use information from a number of product categories prior to making a decision. These purchase situations create dependencies in choice outcomes across categories. As such, these decision problems cannot be easily modeled using the single-category, single-choice paradigm commonly used by researchers in marketing. We outline a conceptual framework for categorization, and then discuss three types of cross-category dependence: cross-category consideration cross-category learning, and product bundling. We argue that the key to modeling choice dependence across categories is knowledge of the goals driving consumer behavior.     

Farmers’ objectives as determinants of organic farming adoption: the case of Catalonian vineyard production

This article assesses the decision to adopt organic farming practices. We use Duration Analysis (DA) to determine why farmers adopt organic farming practices and what influences the timing of adoption. We extend previous studies by including farmers’ objectives, risk preferences, and agricultural policies as covariates in the DA model. The Analytical Hierarchy Process is used as a multicriteria decision‐making methodology to measure farmers’ objectives. The empirical analysis uses farm‐level data from a sample of vineyard farms in the Spanish region of Catalonia. Farmers’ objectives are found to influence the conversion decision. Moreover, farmers who are not risk averse are more likely to adopt organic farming. Results point to the policy changes that have been most relevant in motivating adoption of organic practices.