Inventory service-level optimization within distribution network design problem

We propose a sequential heuristic approach to optimize inventory service levels in a two-stage supply chain. The proposed approach deals with service level and inventory decisions, simultaneously with network design decisions, and incorporating unfulfilled demand costs in a previous inventory-location model. A two-step formulation is considered, where the first step optimizes service level and the second step addresses location and inventory decisions. Each algorithm iteration solves an inventory-location model for a fixed service level, and then the service level is updated in order to reach an equilibrium condition between operating system and unfulfilled demand costs. The algorithm converged in three iterations for a set of sample instances, obtaining the same outcome in comparison with a more intuitive, exact, but more time-consuming search procedure.     

The Effects of Housing Prices, Wages, and Commuting Time on Joint Residential and Job Location Choices

An empirical model of joint decisions of where to live and where to work demonstrates that individuals make residential and job location choices by trading off wages, housing prices, and commuting costs. Wages are higher in metropolitan markets, but housing prices are also higher in urban areas. Consumers can live in lower priced nonmetropolitan houses and still earn urban wages, but they incur commuting costs that increase with distance from the city. Improvements in transportation that lower commuting time will increase nonmetropolitan populations and will increase the number of nonmetropolitan commuters to metropolitan markets. Equal wage growth across labor markets causes a shift in relative population from rural to urban markets, while an equiproportional increase in housing prices causes a population shift toward rural areas.     

我国商品房价格地区差异的分析及启示

近年来,随着房地产市场的快速发展,商品房价格持续快速上涨,房价成为政府和民众高度关注的一个问题。然而,商品房价格呈现明显的地区差异。文章以商品房价格运行理论为基础,分析了商品房价格的现状,通过建立商品房价格影响因素的实证模型分析地区差异的影响。提出在国家调控房地产市场和商品房价格的过程中,不仅局限于金融政策、财税政策、土地政策等,更要从根本上统筹安排,注重实施资源的均衡配置和差异化的调控政策,推进地区之间、城乡之间的一体化发展战略。     

上海市工业园区土地利用相对绩效实证研究

研究目的：通过土地相对绩效更合理地衡量工业土地利用效率。研究方法：利用索洛残差法将上海市工业园区土地绩效中受地理和政策差异影响的部分剔除,得到更具可比性的相对绩效产出指标。研究结果：相对绩效排名和绝对绩效排名具有较大的差异,区位好的工业园区土地利用效率通常被高估,而区位差的工业园区土地利用效率被低估。研究结论：相对绩效能更好地反映工业园区对土地生产潜力的实现情况,以达到土地绩效评估的真正目的。     

中国企业进入“一带一路”国家的投资区位决策 ——基于非市场环境与市场环境的双元视角

本文基于非市场环境和市场环境的双元视角,探讨向具有风险属性的“一带一路”延伸发展中国家投资的中国企业应对非市场环境约束的政治能力和企业社会责任、应对产品市场环境约束的市场能力与风险区位投资之间的关系。结果表明：①中国企业的政治能力、市场能力越强,越倾向于投资到政治风险更高的东道国;②政治能力和市场能力的交互具有协同促使企业向高政治风险区位投资的作用;③相较于工具性/经济性企业社会责任,强制性/社会性企业社会责任会分别增强政治能力和市场能力对企业风险区位投资的积极影响。异质性分析表明,相比于采取情境式政治活动模式的企业和新企业,采取系统式政治活动模式的企业和成熟企业更擅于发挥政治能力和市场能力的联合效应投资到具有更高政治风险的区位。研究发现对中国企业的对外投资区位选择决策具有启示意义。     

Multi-Dimensional Product Differentiation

We analyze product differentiation in a multi-dimensional model with non-uniform consumer distribution. The level of product differentiation is measured by both unit transport costs and firms’ locations. Our analysis concerns both measures. First, fixing firms’ locations, we show that equilibrium prices can increase or decrease with unit transport costs. The overall result depends on the interplay of a shifting effect and a rotating effect—the latter exists only in multi-dimensional models. Second, fixing unit transport costs, we find that under non-uniform distribution, there may exist no equilibrium where firms maximize differentiation on one dimension but minimize differentiation on other dimensions. Instead, there may exist an equilibrium where firms choose intermediate locations, contrary to common findings in existing studies which assume uniform distribution.     

影视拍摄对外景地旅游发展的影响分析--以浙江新昌、横店为例

影视旅游的现象比较普遍,但相关的研究还不多见.文章采用案例分析的方法,分析外景地旅游发展过程中影视的特殊作用.案例地为浙江省的两个典型的影视旅游地,即新昌和横店,采用文献、报纸、网络、统计数据等资料作为分析根据.结果表明,影视拍摄能够增强外景地的旅游感知形象,增加游客数量,促进旅游景区和旅游接待业发展,增加旅游就业.但是,影视拍摄也能给外景地带来一些问题,如投资成本过大、促销策略倾斜、旅游发展时空集聚、同类外景地的品牌竞争.     

物流云服务下动态设施选址问题研究

基于云计算的物流云服务平台利用云中的资源,可以实现供应链上资源的优化组合,进而改变了供应链节点间的服务映射关系,真正实现节点间的"多对多"映射,从而一定程度上改变动态设施选址的模式。在物流云服务环境下研究动态选址问题,结合云服务环境下"多对多"映射关系的特性,以动态P中值选址为例,提出了一种新的基于云服务的动态选址模型,并结合具体算例,运用Cplex求解,证明在物流云服务环境下,可以明显降低选址总成本,同时增加供应链的服务柔性。