中国商业银行规模经济与范围经济的实证分析

本文通过对中国商业银行1996年到2001年的经营情况进行实证分析，估算出各家银行的规模经济系数和范围经济系数，发现大部分商业银行规模不经济而范围经济，规模不经济的程度与银行资产规模呈正相关关系，股份制商业银行的范围经济系数高于国有商业银行的范围经济系数，范围经济与银行资产规模没有必然的联系。在此基础上，本文提出了相应的政策主张。     

Multiproduct Outputs and Scale Economies in Electric Power Production: Some New Estimates

The present study offers an argument, through a technical exposition, which suggests that there are cost differences inherent in serving different types of buyers in the electric utilities industry. To this end, we employ a translog joint cost function (for electricity production) with three outputs, which allows for the examination of the cost differences between wholesale and retail trade for vertically integrated, investor-owned companies in the industry. The regression estimates suggest different costs at the means, however the estimated marginal cost curve for wholesale power is not as robust as those for low-voltage and industrial power.     

The Impact of Frictions in Routine Execution on Economies of Scope

Research summary: Based on a detailed database of a beverages producer‐distributor that expanded its product variety by leveraging its logistic network, we show that product diversification generates economies of scope and also higher operational costs. The result is an inverted‐U relationship between variety and productivity: When the firm offers few additional categories, productivity grows, but as the number of categories rises, the costs of executing the operational routines increase rapidly and productivity falls. The negative effect on productivity increases if the added product category is more dissimilar to previous ones, and decreases with learning from operational experience. Our results highlight how frictions at the operational level can limit the benefits of diversification, even in the absence of other sources of diseconomies, such as increased coordination needs. Managerial summary: One of the prevalent reasons for companies to expand to adjacent product lines is attaining economies of scope. However, such growth strategy also generates operational frictions, even if the day‐to‐day routines do not appear to change at all. Product diversity is disruptive for routine execution, as it requires coordination and exception handling, and may ultimately overcome any efficiency obtained from growth. We estimate the relevance of such operational friction using data from a beverages distribution network. When product variety is low, additional categories do generate efficiency, but after reaching a given threshold, friction prevails. We find that operational friction increases when products are more dissimilar, but is attenuated when workers learn from their own and other's experience. Copyright © 2017 John Wiley & Sons, Ltd.     

Telecommunications and investment decisions in the Philippines

This article is a rejoinder to the article written by R.J. Saunders published in the December 1983 issue of Telecommunications Policy on investment decisions in telecommunications. The author, in this brief paper, attemps to discuss the decision-making process in telecommunications investments described by Saunders and as it relates to the practical experience of the Philippines and other developing countries in a similar situation. Attention is given to how the national telephone programme in the Philippines is being developed. Efforts have been exerted to identify the similarities and basic differences of the Philippines to other developing countries.     

Telecommunications, trade and TDF

Trade in telecommuncations and computing services, particularly trade in data-related services, offers potential for economic growth in all sectors. This article raises a number of issues which need to be settled in international fora before the greatest benefits can be reaped. Differing national regulations, international competition, treatment of data as a commodity, the role of trade in the services economy and legal questions are explored. The author suggests that international agreement on trade in telecommunications and computing services could provide the basis for a ‘core’ agreement on trade in services.     

Telecommunications in Canada: The regulatory crisis

The article highlights the need for a national dimension in Canada's telecommunications systems. But the national dimension is undermined by the country's haphazard regulatory structure, and the consequent barriers to fair and equitable access to telecommunications services. A solution is proposed in the form of a national regulatory body which, without constitutional rearrangement, would yield effective federal authority and simultaneously ensure that valid concerns of a local or intraprovincial nature are taken into account.     

Telecommunications policy and the pleasure principle

Most serious discussion of telecommunications policy is governed by a utilitarian framework in which the success of communications networks is measured by some criterion of productivity. This exclusive emphasis creates undesirable rigidities in large communications systems upon which industrialized societies are so dependent. An analysis of productivity constraints on the social flexibility of existing networks is offered in support of an argument for deliberately building playfulness, in line with certain modest proposals, into the organization of emerging networks of communication.     

Telecommunications and economic development in Singapore

The existing research of aggregate statistical analysis on the relationship between telecommunications and economic development is largely organized around the hypothesis that telephone growth fosters economic development. Although considerable evidence supports that hypothesis, there is also a growing realization that the growth of telecommunications, in turn, requires a sound economy. The existing research, however, ignores the reciprocal relationship between these two variables. Employing Singapore data, this article formulates a simultaneous equation model to assess the reciprocal relationship between telecommunications and economic development. These data support the reciprocal relationship hypothesis. Policy implications of the findings are also discussed.     

Telecommunications planning and the power of expertise

The article points out the often neglected political importance of telecommunications planning experts. It does so by first locating policy planning in the larger socletal phenomenon of technocracy. Next discussed is the relationship of policy planners to political power. Finally the article examines some instances of national telecommunications planning, in particular the USA.     

企业规模、规模经济与产业集群

企业规模问题一直存在着截然相反的观点和主张,造成冲突的原因在于“企业规模”是一个各取所需的含混的概念。具有经济学意义的企业规模应该从两个相互正交的维度上———企业的横向规模和纵向规模———来度量。规模经济来自于横向规模的扩张,而纵向规模的扩张可能会带来规模不经济。产业集群是观察企业横向、纵向规模一个好的样本。区分企业规模的不同性质,将会使与规模经济相关的理论研究出现明晰的路径。     

Telecommunications/ transportation substitution and energy conservation Part 2

Part 1 of this article reviewed existing research both on attitudes toward telecommunications substitution for travel and on operational experiments with teleconferencing and telecommuting. Part 2 examines major factors influencing substitution, including government policy. It concludes that government policy can significantly facilitate telecommunications substitution for travel and, indeed, the achievement of any real measure of substitution may depend upon proactive government policy. However, this is an unlikely prospect in the current US national policy environment.     

中国银行业规模经济效益与相关产业组织政策

大银行具有规模优势,但银行规模并不是越大越好,最佳规模是位于一定区域之内的。同时,银行业的规模经济要受到市场结构、银行制度、管理体制以及金融创新等因素的影响。本文运用指标分析、“生存竞争法”分析,以及Translog成本函数对中国银行业进行了实证考察。结果表明,规模经济在中国银行业中的确存在,但“最大”并不是“最好”,四大国有商业银行呈现一种规模不经济的状态,本文对其原因进行了剖析,并提出相应的政策建议。     

Telecommunications in the developing world : Investment decision and performance monitoring

The contention that there is significant underinvestment in telecommunications services in developing nations is supported by cross country data. The accepted approach to determining whether investment should take place involves: identifying unsatisfied demand; determining the least cost solution; and assessing whether benefits will exceed costs. The author draws upon the experience of World Bank involvement in telecommunications projects in developing nations and concludes that the trend in some developing countries toward increased investment in the sector will continue, furthering the goals of increased economic efficiency and improved social equity.     

Telecommunications/ transportation substitution and energy conservation: Part 1

The substitution of telecommunications for transportation is held to have major potential for increasing energy conservation within the USA, other developed nations, and even developing nations. This article is the first of a two-part re-examination of the substitution hypothesis based on research and experience of the past decade. This part examines the theoretical potential of telecommunications-transportation substitution for energy conservation, and reviews recent research both on public attitudes towards substitution of telecommunications for travel and on the operational experience with substitution experiments in organizations. Part 2, which appears in the June 1982 issue of Telecommunications Policy, examines the major factors which influence whether individuals and institutions will in fact choose telecommunications over travel, and then discusses government policy which could facilitate telecommunications substitution for travel.     

Economies of Scope,Resource Relatedness,and the Dynamics of Corporate Diversification

Research summary: The dominant view has been that businesses that are more related to each other are more often combined within diversified firms. This study uses a dynamic model to demonstrate that, with inter‐temporal economies of scope, diversified firms are more likely to combine moderately related businesses than the most‐related businesses. That effect occurs because strong relatedness reduces redeployment costs and makes firms redeploy all resources to better performing businesses. The strength of that effect depends on inducements for redeployment measured as the current return advantage of one business over another business, volatilities of business returns, and correlation of those returns. This study develops hypotheses for those relationships and suggests empirical operationalizations, encouraging empiricists to retest the implications of relatedness for the dynamics of corporate diversification. Managerial summary: It is believed that diversified firms are more likely to combine more‐related businesses because relatedness enables sharing of resources between businesses. Indeed, a firm can apply knowledge created in one business to another business, avoiding costly duplication in knowledge development. Resource sharing also adds value when a firm offers several products, adding the convenience of one‐stop shopping and charging higher prices. However, resource sharing is not the only motivation for corporate diversification. In environments where profitability of businesses changes frequently, firms diversify by redeploying part of resources from an underperforming business to a better performing business. This study uses a dynamic model to demonstrate that, with that second motivation for corporate diversification, firms end up combining moderately related businesses rather than the most‐related businesses. Copyright © 2017 John Wiley & Sons, Ltd.     

Telecommunications interception in Australia: Recent trends and regulatory prospects

This article reviews recent trends and regulatory prospects relating to telecommunications interception in Australia. The steady expansion of surveillance powers in Australia over the past two decades, particularly at the federal level, is critically evaluated. Drawing comparisons with the United States, the article analyzes the strengths and weaknesses of the existing regulatory system for telecommunications interception, including legal safeguards such as judicial warrants and civil actions for unlawful interception. The authors conclude by sketching a new normative framework for telecommunications interception that repudiates the idea of “balancing” competing interests in favor of a regulatory model that promotes human rights and due process as paramount considerations.     

Telecommunications policy-making in New Zealand during the last two decades

During the last two decades the traditional roles of the major providers of telecommunications services have changed due to internal and external economic, political, social and technological pressures. This paper, using case-study research, describes the ‘change agents’ and formal structures involved in telecommunications policy-making processes, taking note of a move towards, and need for, a coherent national communications policy. It illustrates how decisions have been made and lays the groundwork for a more detailed study of the evolutionary changes in telecommunications policy-making in New Zealand in subsequent years.     

A tale of two reforms: Telecommunications reforms in Mexico

The telecommunications industry in most parts of the world experienced a round of market-led reforms in the early 1990s. After a period of sustained development in the sector numerous countries are moving toward government-led network deployments. Even though it may appear as if the pendulum swung back to the previous 1990s period of government-led development, this paper argues persistent regional disparities in access and adoption of new technologies generated a need for public action in the second reform. By analyzing the Mexican case and comparing the policy choices in each one of the reforms, this paper sheds light on how particular policy decisions in the first reform generated inefficient market solutions and were key in creating a perception of the need for stronger public action. In both reforms, the policymaking process was carried out by a small elite that negotiated its contents behind closed doors. Paradoxically, within the transition to democracy, in the second reform, the leaders of the major political parties established a closed-door agreement. Even though the 2013 telecommunications reform improved the status quo, it did not decrease market concentration and, once again, we face low levels of investment and high levels of digital exclusion. By reconstructing the policy decision process in each reform, this paper argues that the closed-door policy choices taken, which were the result of the interaction of political actors with their own agenda and interests, hampered the most efficient solutions.     

Telecommunications in the land of the Thunder Dragon: recent developments in Bhutan

This paper charts the development of telecommunications in Bhutan. Since the introduction of telecommunications services in 1963 Bhutan has faced many challenges as it has sought to roll out a network that covers the whole population and country. A small population, a mountainous geography, a transitional economy and a unique approach to development—Gross National Happiness—present many challenges that need to be overcome if the telecommunications industry is to develop further. Added to this is the decision of Bhutan to join the outside world through membership of the ITU, APT and WTO that has added liberalisation and privatisation to the challenges faced by Bhutan. This paper identifies two broad policy options that Bhutan could adopt—network expansion nationally or investment concentration towards urban areas. The authors conclude that due to the limited resources available to Bhutan these policies are contradictory and will take the telecommunications industry in quite different directions if adopted.