EVA与MVA的相关性在我国交通运输企业的实证分析

本文对我国交通运输上市企业EVA及传统业绩评价指标与MVA的相关性进行了回归分析,并分析了我国交通运输企业对EVA的接受程度,应用EVA的市场可能性以及如何将EVA用于企业的管理。     

基于成本的物流中心优化设计研究

如何有效地优化物流中心布局设计 ,以便在控制成本的同时提升产品的附加值 ,是众多企业面临的一个共同问题。本文从物流中心设置及配送方案着手 ,提出了相关的优化方法以期解决这一问题。     

我国特大城市交通战略的未来走向——京沪城市交通比较与启示

交通政策实践分析表明,京沪两市目前交通实践主要集中于交通供给政策,交通需求政策和空间政策实施力度不够,这与发达国家大城市交通实践形成鲜明对比,也导致了京沪城市交通效率低下.两市交通政策的最大差别在于对个体机动车辆的控制方面,上海通过私家车牌照拍卖,在一定程度上控制了小汽车的增长速度,而北京由于缺乏有效举措导致小汽车过快增长,这一政策差别是两市交通效率差异的主要原因.通过京沪交通比较研究,就我国特大城市交通战略的未来走向提出相应的政策建议,以期为城市交通发展决策提供参考依据.     

物流运输产品市场效果的模糊综合评价

对影响客户选择物流运输产品的因素进行了分析,在此基础上运用模糊综合评价法对物流企业运输产品的市场效果进行评价。     

农村人力资本投资及外溢与城乡差距实证研究

文章以人力资本溢出效应城乡两区域模型为基础,采用协整检验和误差修正模型,对中国农村人力资本投资及外溢与城乡差距的关系进行实证检验。结果表明,缩小中国城乡差距,必须加大对农村的人力资本投资。同时,要加强政府对农村的基础设施投资,为农村人力资本作用的充分发挥创造条件。     

The price relationship between organic and non-organic vegetables in the U.S.: evidence from Nielsen scanner data

This study investigates price relationships between organic and conventional carrots, tomatoes, and lettuce in the U.S. utilizing Nielsen scanner data from 2006–2015. We employ a threshold vector error correction model (TVECM), threshold vector autoregressive model (TVAR), and threshold cointegration test to test whether market integration exists between organic and conventional vegetables as well as the existence of asymmetric price transmission. The results find positive long-run relationships between organic and conventional prices of carrots and tomatoes and show the existence of asymmetric price transmission in price pairs of lettuce and tomatoes. Our findings suggest that the price relationship between organic and conventional vegetables varies by characteristics, such as shelf life, volatility in the price premium, and substitutability.     

Explaining Real Commercial Rents Using an Error Correction Model with Panel Data

This paper presents rent models for retail and office property in the United Kingdom. Panel data are used covering eleven regions for 29 years, enabling us to overcome the limitations of a relatively short time series. We use an error correction model (ECM) framework to estimate long-run equilibrium relationships and short-term dynamic corrections. The combination of panel data and an ECM is an innovative approach that is still being developed in economics. We construct new supply series that combine infrequent stock data with more frequent construction data. Separate regional models are estimated for retail and office properties. The regions are then combined into a number of panels on the basis of the income and price elasticities in the long-run and short-run models. Unlike previous studies, we find no evidence of a board north–south divide between low growth and high growth regions. Like these studies we do find a London effect: in London, demand elasticities for space with respect to both price (rent) and income are much lower in magnitude. We conclude that, while the economic drivers may vary, there is no evidence of differences in the operation of the regional property markets outside London. Elasticities for retail and office are similar. Our final models are parsimonious with single measures of economic activity and of supply and always support the use of an ECM.     

Real estate return correlations: Real-world limitations on relationships inferred from NCREIF data

Correlation estimates for returns between individual properties are subject to large inherent uncertainties due to limits on the amount of data that is likely to be available for the foreseeable future. After allowance for correlation sampling error, it is impossible to distinguish on an ex ante basis between the risk-reduction capabilities of mean-variance portfolio selection models and naive diversification without regard to property type or geographical location. The naive portfolio diversification strategies of typical institutional real estate portfolio managers are rational responses to limitations on the informational content of statistical analyses of historical real estate data.     

我国煤炭输送方式经济性方面的研究工作

煤炭运输方式的经济性问题是制定能源产业政策的基本理论问题之一,为此回顾了我国五十年代以来的部分有关研究工作,对不同时期的部分研究实例从研究方法、技术方案和研究结论三个方面进行了对比分析,揭示了不同研究工作在基本原理方面的一致性和技术方案方面的差异性,以及由此造成的研究结论的异同。     

石油储量价值评价中运销成本级差模型的设计与检验

对石油资源价值评价中的4个成本因素之一——运销成本级差因素进行了讨论。文中分析了运销成本级差因素的组成因子之后．建立对之进行测算的数学模型，并就两个油田的实测数据给出了计算结果。