ECONOMIES OF SCALE AND SCOPE AND THE ECONOMIC EFFICIENCY OF CHINA'S AGRICULTURAL RESEARCH SYSTEM*

This article investigates economies of scale and scope and other potential sources of improvements in the economic efficiency of China's crop breeding, an industry at the heart of the nation's food economy. Using data covering 46 wheat‐ and maize‐breeding institutes from 1981 to 2000, we estimate cost functions for the production of new varieties at China's wheat‐ and maize‐breeding institutes. Our results indicate strong economies of scale, along with small to moderate economies of scope related to the joint production of new wheat and maize varieties. Cost efficiency increases significantly with increases in the breeders' educational status and with increases in access to genetic materials from outside the institute.     

ECONOMIES OF SCALE AND SCOPE: THE CASE OF SPECIALTY HOSPITALS

The recent growth of physician‐owned hospitals specializing in orthopedic and surgical specialty services in the United States has generated considerable controversy, yet there is little understanding of the economic logic of organizing hospital services around these single specialties. This article takes a multiple output hospital cost function approach to an empirical investigation of whether single specialty hospitals (SSHs) exhibit economies of scale and economies of scope as keys to new insights into that logic. We applied generalized estimating equation techniques to a sample of 80 SSHs and 883 general hospital competitors over the 1998–2008 period. Results indicated large underlying scale differences across the organizational types. Simulation analysis revealed the potential for exploitation of economies of scope gained from shifting output from SSHs to general hospitals. (JEL I18, L23)     

UNIVERSITY COST STRUCTURE IN TAIWAN

In this paper we demonstrate that the measures of scale and scope economies may be elusive if failing to consider quality variation among universities and endogeneity of congestion in students’ learning and living facility utilization. Empirical results show that the private and highly congested universities have consistently underestimated the cost of congestion, which results in an upward bias in estimating the economies of scale and scope. Taking into account the quality of outputs in enrollments and the congestion factor, we find that the private and the more congested universities have much less scale and scope economies than the public and the less congested institutions. (JEL I21, H52, 9120)     

Scope economies in the pharmaceutical sector

The paper’s objectives are twofold: to propose an experimental simulation to measure scope economies between pairs of submarkets and to point out the role of submarkets in explaining the concentration level in the pharmaceutical market. We simulate scope economies consistent with the diversification choices of large international companies in the years 1987 and 1997. Our results suggest that: i) the random diversification (that is no scope economies hypothesis) is rejected, and ii) scope economies are significant. (JEL: C15, D21, L11, L65)     

Estimation of scale and scope economies in multiproduct banking: evidence from the Fourier flexible functional form with panel data

An empirical study is conducted on scale and scope economies for Taiwan's banking industry with panel data using a Fourier flexible cost function developed by Gallant and a translog cost function, both of which take economic efficiency into account. It is found that the Fourier form is more appropriate than the traditional translog form in fitting the data, and that various efficiency measures computed using the Fourier function are compatible with each other, while those computed using the translog function are not. The Fourier evidence shows that sample banks continue to enjoy economies of scale, and exhibit scope diseconomies, which indicates that greater product diversification can reduce banking costs through product-mix economies. Banks may benefit from further diversifying their line of financial services.     

我国高校效率研究

本文同时应用参数法和非参数法分析我国高校1998—2005年的效率状况:总体来说,我国高校的平均技术效率较高,西部地区高校、理工院校和财经政法大学效率最为明显;我国高校存在规模经济和范围经济,总体规模经济程度不断上升,但总体范围经济程度逐步下降,具体来看,硕士生的规模经济程度较为明显,而硕士生和博士生存在范围不经济现象;DEA和SFA的效率值相关但不显著,效率排序10%显著相关;学校的外部因素和大部分内部因素显著影响学校效率。     

Does sports activity improve health? Representative evidence using local density of sports facilities as an instrument

Using representative and geocoded data from the Swiss Household Panel and the Swiss Business Census, we estimate the effect of sports activity on health. OLS models show that sports activity significantly decreases overweight, sleeping problems, headaches, back problems, and perceived health impediments in everyday activities and significantly increases health satisfaction. Because sports activity is likely to be misreported and correlated with unobserved determinants of health, we use the number of sports facilities within 6 miles of the individual’s residence as an instrument for sports activity. Although the instrument is powerful in explaining sports activity, the second-stage effects on health are mostly statistically insignificant due to the high SEs of the IV estimates.     

THE EFFECTS OF FIRM BOUNDARY AND FINANCING CONSTRAINTS ON UTILITY COSTS: THE CASE OF MUNICIPALLY OWNED ELECTRICITY DISTRIBUTION UTILITIES

ABSTRACT: A number of studies have examined costs and potential for scale and scope economies in electricity distribution; however, few if any, have examined this area in terms of the unique constraints associated with municipal ownership or historical and regulatory constraints associated with former municipal ownership. This paper focuses on 19 distribution‐only municipally owned utilities for a ten‐year period (1988–97). Distortions from variable outputs but largely fixed inputs are minimized. The data used were collected specifically to assess productivity, cost, and efficiency performance and include value‐based capital inputs and service prices. Outputs include energy conveyed and number of connections; inputs include capital, system losses, labour, and materials. We examine the effect of using third‐party financing (e.g., connection charges), with its inherent principal‐agent problems, on utility costs, as well as the effect of shared services and multi‐utility output (e.g., electricity and water). A translog total cost function is estimated. Our findings suggest significant returns to scope but also significant increases in costs associated with the use of third‐party financing. The results also suggest scale diseconomies. Shared outputs, which have been greatly restricted or eliminated under restructuring, may have provided larger, and now lost, economies than the scale returns blindly pursued by some through restructuring or incented/forced mergers or divestitures. Finally, it is clear that third‐party financing can raise costs; such financing is widely used among utilities providing electricity, gas, water, and telecommunications, and should be closely scrutinized.     

Is big better? On scale and scope economies in the Portuguese water sector

The ‘big is better’ idea has recently been challenged in network industries. Scale economies are considered finite so that for the individual utility an optimal scale of operations arises. A similar observation yields for scope economies as joint production is not predicted univocally anymore. In the water sector, scale economies and joint production are preferred. Nevertheless, several countries are restructuring the sector in order to improve the scale and scope of operations. This article intends to provide some insights into this matter. We analyze the Portuguese water market structure using non-parametric techniques with data from the year 2005. After surveying the literature on scale and scope economies, we discuss the peculiarities of the Portuguese water sector. The paper confirms the natural monopoly features. Although scope economies are absent, it highlights scale economies. The optimal scale of the utilities is located between 160,000 and 180,000 inhabitants. As such, the Portuguese water sector optimally counts 60 water utilities.     

EXTERNAL ECONOMIES OF SCALE AND OPTIMAL PLANT LOCATION: CORRECTION

This note shows that there is no interior solution in Mai and Hwang's oligopolistic location model with free entry when the sum of external economies scale and the degree of returns‐to‐scale is one or less than one. Furthermore, the shape of the demand function plays a key role in the determination of the oligopolistic firm's plant location.     

Are Municipal Electricity Distribution Utilities Natural Monopolies?

The purpose of this study is to analyse the cost structure of the Swiss electricity distribution utilities in order to assess economies of scale and density and the desirability of competition in the distribution of electric power. A translog cost function was estimated using panel data for a sample of 39 municipal utilities over the period 1988–1991. The results indicate the existence of economies of density for most output levels and the existence of economies of scale only for small and medium-sized electric utilities. The empirical evidence suggests that franchised monopolies, rather than side-by-side competition, is the most efficient form of production organization in the electric power distribution industry. Further, the majority of the utilities analysed do not operate at an optimal service territory size. Therefore, the consolidation of small utilities whose service territories are adjacent is likely to reduce costs.     

自然垄断的"三位一体"理论

传统自然垄断理论是建立在规模经济、范围经济和成本劣加性基础之上的，本文认为社会总价值或总效用和社会净收益的优加性是比成本劣加性更好地定义自然垄断的概念，并在对规模经济、范围经济和网络经济重新定义的基础上，从规模经济、范围经济、网络经济“三位一体”角度重新解释了自然垄断概念，提出了自然垄断的“三位一体”理论，为自然垄断产业规制及其改革奠定理论和实证基础。     

INCENTIVE ISSUES IN R&D CONSORTIA: INSIGHTS FROM APPLIED GAME THEORY

This article sketches how insights from applied game theory can be applied to Research and Development (R&D) consortia using a case study on an international plant breeding consortium. The insights jointly comprise a new “logic of collective action in R&D,” which is inspired by Olson’s Logic of Collective Action but goes beyond it. We analyze R&D consortia as institutions that respond to a variety of incentive problems which are obstacles to realizing the benefits of cooperation that arise due to the public goods nature of outputs, complementarities of inputs, and economies of scale and scope. Additionally, we sketch a “big‐picture” consortium game, which abstracts from specific incentive issues. (JEL B41, D02, H41, O31, O32)     

Do Geographic Scale Economies Explain Disturbances to Heckscher–Ohlin Trade?

This paper examines whether "geographic scale economies" explain the trade that remains unexplained by the Heckscher–Ohlin model. The paper develops a theoretical specification that integrates geographic scale economies into the Heckscher–Ohlin model, and develops a statistical method for detecting geographic scale economies in the distributional features of a disturbance term. The units of analysis are US states. The findings reveal that empirical support for the Heckscher–Ohlin theory is improved by accounting for geographic scale economies within states; geographic scale economies do not generate differences in Rybczynski effects across states; and the scope of geographic scale economies is contained within states.     

Regional differences in the production processes of financial and social outputs of microfinance institutions

This study uses panel data of microfinance institutions across the world to compare production processes across regions, assess the relevance of unobserved heterogeneity and estimate economies of scale. Comparing a financial production process to a multidimensional production process that accounts for the presence of outreach in the objective function suggests that financial and social output reflect complements in South Asia but not in other regions. Furthermore, we find substantial economies of scale for a pure financial production process. However, accounting for outreach lowers estimated economies of scale, suggesting that producing outreach creates high transaction costs and requires exploitation of local knowledge.     

A generalized panel data switching regression model

This paper considers a generalized panel data model of polychotomous and/or sequential switching which can also accommodate the dependence between unobserved effects and covariates in the model. We showcase our model using an empirical illustration in which we estimate scope economies for the publicly owned electric utilities in the US during the period from 2001 to 2003.     

A Fourier analysis of the US dairy industry

Measurement of economies of scale and scope is particularly important for predicting growth and product diversification. However, estimates are useful only to the extent the underlying production technology is modelled accurately. This study measures economies of scale and scope in the rapidly changing US dairy industry with a Fourier flexible cost function, which provides a global approximation of the unknown function. We use the high quality national Agricultural and Resource Management Survey (ARMS) survey data. We find economies of scale at most firm sizes and persistent economies of scope across firm sizes in this industry, which is counter to estimates from two Diewert‐flexible functional forms.     

Babbage's Legacy: The Origins of Microeconomics in On the Economy of Machinery and Manufactures

British mathematician Charles Babbage (1791–1871) spent immense energy to build mechanical calculating engines. Hoping that it might help him in designing and building his engines, he visited numerous workshops and factories in both England and Continental Europe. One of the consequences of these visits was his On the Economy of Machinery and Manufactures, published in 1832. Through his observations, Babbage grasped the advantages of machinery and economies of scale. In micro terms, he acknowledged the cost‐reducing features of economies of location, vertical integration, and division of labor – beyond Adam Smith's analysis – as well as the efficacy of clustering. He also pointed out the relationship between firm size, economic crisis, and innovation.     

On the Limits to the Long-Period Method in Classical Economics: A note

On a first reading of Theory of Production, Kurz & Salvadori (1995) appear to confine the empirical domain of the long-period models of the classical theory of value and distribution to stationary economies with non-constant returns to scale and to growing economies with constant returns to scale. Such a reading is shown to be untenable since it merges the two levels of exploring the extension of a model and of testing a theoretical hypothesis. Conversely, the way Kurz & Salvadori tackle the problems of price dynamics and returns to scale in growing economies is shown to be compatible with what appears to be Sraffa's (implicit) strategy of research.     

INVERSE RELATIONSHIP BETWEEN PRODUCTIVITY AND FARM SIZE: THE CASE OF CHINA

In developing agricultures, past research has suggested an inverse relationship between farm productivity and size. The raw data from China show such an inverse relationship. However, the inverse relationship disappears after we instrument for land area using the fact that one of the objectives of the land allocation process in rural China is to ensure local households to meet their nutritional needs. The empirical inverse relationship is likely due to the failure to account for the unobserved land quality that is unevenly distributed across the farm size continuum, rather than inherent to China's agriculture. (JEL O13, Q12, Q15)