电子商务中消费者的权益保护研究

电子商务改变了传统商务手段,开拓了新的市场,产生了巨大的效应,同时也为消费者的权益保护带来了新的挑战。本文旨在对这些问题进行分析并提出相应的对策,以保护消费者在电子商务环境下的合法权益。     

A market-level model of relationship regulation

This research examines the moderating effects public policy has on relationship strength in a relationship marketing context. Prior research suggests that many positive outcomes emerge from forming inter-firm relationships, yet few examine potential negative outcomes such as anti-competitive behavior. This paper examines what happens to both positive and negative outcomes, when close inter-firm relationships are regulated directly by public policy. It is found that regulations intended to protect consumers and small retailers from anti-competitive behavior are effective in reducing the negative outcomes of such behavior, yet they simultaneously have an unintended effect of dampening the positive outcomes that close inter-firm relationships provide.     

电子商务的发展与传统经济的新视角

电子商务的浪潮及其广阔的应用前景冲击着社会,给传统经济带来严峻挑战的同时,也融入传统产业并催生了新的产业,给传统企业提供了无限的生机和发展机遇。中国企业电子商务的应用与发展也经过了多个阶段。文章就此进行讨论。     

Price uncertainty and vertical integration: an examination of petrochemical firms

The petrochemical industry employs assets subject to temporal and site specificity. The OPEC oil price shocks of the 1970s made it difficult to write contracts covering business dealings in the industry. I use this production and economic setting as a natural experiment to test transaction cost theory. In support of the theory, I find that input price uncertainty in the 1970s positively affected the extent of vertical integration by firms into input stages. Moreover, the positive reaction of vertical integration to price uncertainty mainly occurs in transactions subject to asset specificity. I also examine price controls and market power as alternative explanations for vertical integration in the industry, but fail to find support for these hypotheses.     

You’re the Only One,or Simply the Best. Hotels differentiation,competition, agglomeration,and pricing

Drawing on competition, signalling and agglomeration perspectives, we investigate how vertical and horizontal differentiation influence price, and how hotel competition and agglomeration may moderate any such effects. We argue that vertical differentiation should include online reputation to complement category, and that hotel clustering can provide benefits for incumbents. Hypotheses are tested using quantile regression on a sample of 1870 hotels. In order to account for any service dimensions, an index of differentiation is estimated. We found that local competition and agglomeration moderates the relationship between differentiation and pricing. Furthermore, online reputation effects are more intense for low priced hotels. Indeed, when competition is intense, the positive effect of horizontal differentiation is lower for low priced hotels. Similarly, hotel clustering reinforces the impact of category on price, but it reduces the benefits of offering more services.     

货币政策与异质性企业杠杆率——基于纵向产业结构的视角

当前,高杠杆已成为我国金融风险的重要源头,围绕结构性去杠杆来防范化解金融风险的基本思路,各方提出了一系列去杠杆措施。在此背景下,本文建立了一个包含“金融摩擦”与“资产负债表衰退”双重机制的动态随机一般均衡(DSGE)模型,探讨了中央银行紧缩性货币政策对国有企业与民营企业杠杆率的影响机制。本文研究认为,第一,中央银行提高政策利率会降低国有企业杠杆率,但会以民营企业杠杆率上升与总产出略微下降为代价;第二,伴随着政策利率上升,纵向产业联结度下降将会扩大国有企业与非金融企业整体杠杆率下降幅度,并减小民营企业杠杆率上升幅度;第三,货币政策对非金融企业杠杆率进行响应有助于提高社会福利,但效果并不显著。由此,本文研究认为,推动经济去杠杆需要在管住“货币”的同时,深入研究财政政策、宏观审慎等其他政策选项的可行性。在推动去杠杆的总过程中,货币政策要管住货币“总闸门”,宏观审慎政策要把住风险“总关口”。     

Vertical transmission of overweight: Evidence from a sample of English adoptees

Vertical influences can significantly shape children overweight by affecting both genetics and the environment children are exposed to. This paper examines the vertical (parental) transmission of child overweight drawing upon a fifteen year sample of English adults and their children, both adopted and biological, for which we can retrieve clinical measures height and weight. We find that, when both parents are overweight, children exhibit an increased likelihood of overweight, irrespective of whether they are adopted or biological children. When both parents are obese as opposed to overweight the picture is different. We find that the likelihood of child overweight increases by 16.7 percentage points among natural (non-adopted) children but only by 4.5 percentage points among adopted children. This suggests that the transmission of overweight when both parents are obese is not merely genetic, and what has been called vertical or parental transmission plays a non-negligible role. Our findings are validated by are a battery of robustness checks.     

Westernization of Asian diets and the transformation of food systems: Implications for research and policy

Rapid economic and income growth, urbanization, and globalization are leading to a dramatic shift of Asian diets away from staples and increasingly towards livestock and dairy products, vegetables and fruit, and fats and oils. While the diversification of diets away from the traditional dominance of rice with rising incomes is expected and observed, current food consumption patterns are showing signs of convergence towards a Western diet. The diet transition is characterized by increased consumption of: wheat; temperate fruit and vegetables and high protein and energy dense food. Globalization and the consequent global interconnectedness of the urban middle class, is the driving force behind the convergence of diets. The rapid spread of global supermarket chains and fast food restaurants is reinforcing the above trends.     

Vertical integration versus vertical separation: An equilibrium model

In this paper, the role of strategic forces in vertical relationships is examined. Using a simple model of differentiated products with symmetric demands and costs, the Perfect equilibrium to a vertical integration-vertical separation game between manufacturers is determined. Given the assumptions of the model, I show that the manufacturer's decision whether to vertically integrate or to remain separate from its retailer depends on the degree of product differentiation. I show that when the products are poor substitutes, the only Perfect equilibrium is vertical integration by both manufacturers. As the products become closer substitutes, an additional Perfect equilibrium appears, both firms vertically separated. For manufacturers, the vertically separated equilibrium always Pareto dominates the vertical integration equilibrium when both equilibria exist.This paper is a revision of Chapter 4 of my Ph.D. dissertation. I wish to thank my Senior Supervisor, Professor Thomas W. Ross, for his many helpful comments. An earlier version of this paper was presented at the Canadian Economic Association meetings in Kingston, June 1991. Helpful comments and suggestions were also received from Keith Acheson, Leigh Anderson, Jeffrey Church, Chantale Lacasse, Frank Mathewson, and Don McFetridge and two anonymous referees. I am responsible for any errors or omissions.     

Vertical Relationships in the Automotive Industry: Do They Matter?

In this note we examine how vertical relationships are related to the efficiency of the operations in the automotive production chain. We first provide an overview of the nature of supplier arrangements by comparing current practices in the countries Japan, US, and Germany. Current best practices show that vertical linkages in the automotive industry have shifted away from simple market transactions and now involve closer long-term interactions coupled however with subtle incentive elements. We outline the economic issues which are present in vertical relationships and include a brief account of differing theoretical perspectives. Then, we use a refined methodology to measure productivity at the industry level for the supplier industries automotive parts and metalworking and for the final assembly industry. It turns out that Japanese industries achieve the highest productivity level at the supplier and at the assembly level. We interpret the empirical results and relate the differences in vertical arrangemen s with the efficiency of both parts in the relation.