中国服务业的新经济地理特征

 利用2008年地级及以上城市层面服务业的汇总数据和2007年的城市数据,本文对影响服务业产业集聚的因素作了初步的考察,特别关注代表地区市场容量及与市场接近程度的城市市场潜能带来的影响。我们的分析表明,市场潜能较高的城市其服务业集聚程度也更高,平均来看,城市市场潜能提高1%,其服务业集聚程度提高0.2%左右。并且市场潜能对服务业集聚的影响在中部地区最为明显,东部地区次之,西部地区则不显著。市场潜能对服务业影响在地区间的差异可能与东部、中部、西部地区在城市体系以及地理位置的不同有关。本文还分析了其他城市特征及行业差异对服务业分布的影响。     

Reshaping the Social: A Comparison of Fasu and Kubo-Febi Approaches to Incorporating Land Groups

In Papua New Guinea, local communities increasingly strive to render themselves ‘visible’ to the state as entities entitled to control and claim benefits from developments on their land. When people commit expressions of social form to paper they inevitably reshape previously operative social and political forms. This article compares ways in which two groups of Papua New Guineans have gone about the process of forming Incorporated Land Groups. Different histories of resource extraction, associated differences in engagement with state and companies and different pre-existing social forms are all reflected in the negotiations described. We discuss people's motivations for drawing up lists of members, the ways they went about this and implications for the communities themselves and for ILG registration more generally. Our analysis draws attention to how outcomes are shaped by scales of differentiation and emergent inequalities within the legal entities being imagined.     

Water Insecurity: A Case for Social Policy Action by Social Workers

Abstract

This article discusses the nationally and internationally urgent water insecurity issue, and why it represents a highly relevant area for social policy action by social workers, both at local and global levels. Drawing on secondary data analysis, the paper explores the nature and scope of water insecurity as a global social work issue, discusses its social policy dimensions, and suggests a framework for social policy action by social workers. It argues that, due to the complex nature of the water insecurity issue and its consequences, particularly on the poor and disadvantaged groups, and on ecosystems, it is critical to analyse it from conservation, distribution, and access perspectives and to act. Social workers need to think creatively about the application of their knowledge, skills, and virtues to the water insecurity issue in order to bring about necessary changes in human and institutional behaviour relating to water.     

Price Incentives and Coordination in a Two‐Product Decentralized Supply Chain

We investigate pricing incentives for competing retailers who distribute two variants of a manufacturer's product in a decentralized supply chain. Under a two‐dimensional Hotelling model, we derive decentralized retailers' prices for the products, and distortions in pricing when compared to centrally optimal prices. We show that price distortions decrease as consumers' travel cost between retailers increases, due to less intense competition. However, price distortions do not change monotonically in consumers' switching cost between products within stores. To fix decentralized retailers' price distortions, we construct a two‐part pricing contract that coordinates the supply chain. We show that the coordinating contract is Pareto‐improving and analyze increase in the supply chain profit under coordination.     

Distribution Channel Strategies for a Manufacturer with Complementary Products

In this article, we consider distribution channel strategies for an incumbent manufacturer who produces two complementary products and must determine whether or not to have another company to sell its products. We identify factors that affect the manufacturer's motivation to use dual‐channel distribution. Our results show that both complementarity between complements and product substitutability between firms influence the manufacturer's channel strategy. We find that if the potential entrant does not produce the complement of the primary product, a higher complementary effect for the complement will weaken the motivation of the incumbent to add an indirect channel. We also find that the incumbent has a stronger incentive to add the indirect channel when a product's substitutability is high. Furthermore, we show that when the two channels have the same pricing power, the incumbent has a stronger incentive to sell through the indirect channel in a higher pricing power environment.     

怎样的制造企业更愿涉足服务业务?———“服务化困境”问题的生产率匹配探析

本文关注于制造业企业服务化过程中的产业效率因素,设计了差异化产品模型。在需求层面,公司所提供的产品和服务之间具有互补性;而在供应方面,企业在产品生产和服务之间在专业知识分配上存在竞争。理论模型提供了对制造企业服务化与全要素生产率之间的计量评估。本文利用我国上市制造业版块中的企业数据,通过使用具有异质性的Fractional Probit 模型控制内生性并进行实证检验,理论模型推导和经验估计指出,企业全要素生产率与服务化之间存在“U”型关系,针对四个行业部门的检验也证实服务化和企业全要素生产率之间的非线性关系。在不同地区的企业之间,“U”型关系也存在差异。企业所处行业环境、所在区域以及所提供产品和服务的内在特征对于“服务化困境”的表现都存在差异性的影响。     

长城窝堡井田煤中砷的分布与评价

燃煤是环境中砷的主要来源之一。通过长城窝堡煤矿钻孔煤芯中砷测试分析得出:研究区煤中砷含量较高,算术平均含量高达84.5mg/kg,远高于中国煤中砷的含量;且与煤厚呈负相关;在煤层开采过程中要加强砷的处理研究。     

促进加工贸易向西部地区转移政策研究

为缩小地区经济差距,改变我国加工贸易东重西轻的分布格局,同时也为了加工贸易转型升级战略的顺利实施,促进加工贸易向西部地区转移具有十分重要的现实意义。本文从政策视角着重论述我国西部地区加工贸易的现状和承接加工贸易的优势,进而分析影响西部地区承接加工贸易的制约因素,提出促进加工贸易向西部地区转移的政策建议。     

Bayesian and likelihood-based inference for the bivariate normal correlation coefficient

The paper develops some objective priors for correlation coefficient of the bivariate normal distribution. The criterion used is the asymptotic matching of coverage probabilities of Bayesian credible intervals with the corresponding frequentist coverage probabilities. The paper uses various matching criteria, namely, quantile matching, highest posterior density matching, and matching via inversion of test statistics. Each matching criterion leads to a different prior for the parameter of interest. We evaluate their performance by comparing credible intervals through simulation studies. In addition, inference through several likelihood-based methods have been discussed.     

A characterisation of logistics networks for product recovery

Recovery of used products is receiving much attention recently due to growing environmental concern. Efficient implementation requires appropriate logistics structures to be set up for the arising goods flow from users to producers. We investigate the design of such logistics networks. As a basis for our analysis we review recent case studies on logistics network design for product recovery in different industries. We identify general characteristics of product recovery networks and compare them with traditional logistics structures. Moreover, we derive a classification scheme for different types of recovery networks.