Reducing urban public transport costs by tendering lots: a panel data estimation

Allotment is, for urban authorities, a governance strategy to reduce public transport costs. It consists of dividing a network into several lots, so as to multiply the number of calls for tender. On the one hand, gains should be obtained by increasing competition for the market and reducing the costs of obtaining accurate information. On the other hand, cutting a network into several parts is also expected to have negative consequences on production costs, in terms of lower returns to scale. Many industry stakeholders believe that the latter element more than compensates for the former. In this article, we estimate a translog cost function with a panel of 141 French urban public transport networks. Our main conclusion is that scale economies are exhausted for a production of about 3 million vehicle-kilometres per year. Therefore, as far as returns to scale are concerned, allotment would reduce the costs of public transport services for the main cities of our sample. A second dividend for allotment is then presented and implies that the assumed trade-off between returns to scale and increased competition is irrelevant.     

Production and costs in the South African motor vehicle industry

This study investigates the existence of economies of scale in the South African motor vehicle industry as well as the substitution possibilities between input pairs and the direct and cross-price elasticities of demand for the various inputs. Because of data limitations, a translog cost function was estimated for only a three input model corresponding to a homogeneous production function involving capital, labour and intermediate goods. The issue of the existence of economies of scale in the South African motor vehicle industry is a particularly important one because South Africa once again is a member of GATT and a full participant in the international trade arena. The null hypothesis of constant returns to scale was rejected at the 0.5% level of significance. Thus, the results of this model are certainly consistent with economies of scale in the South African motor vehicle industry. The estimated direct price elasticities were consistent with the hypothesis that, during the past two decades, capital was the productive factor with the most elastic demand, and the estimated cross-elasticities between input pairs generally supported the hypothesis that all inputs are substitutes.     

Estimating technical change by nonparametric methods

A nonparametric method using dynamic data envelopment analysis is developed here to specify and estimate a dynamic production frontier. By this technique technological progress measured by the time shift of the production frontier and the scale economies measured by increasing returns to scale are estimated from the observed input output data, which may sometimes be nonstationary. An application to US computer industry exhibits substantial technological progress and scale economies over the period 1987–1998.     

Do Technological Conditions of Production Explain Industrial Growth? The Indian Manufacturing, 1998–1999 to 2007–2008

The paper tries to assess whether the technological conditions of production can explain the sluggishness in growth in Indian manufacturing industries reflected in a stagnant share in aggregate GDP. For this purpose, the returns to scale and elasticity of factor substitution are estimated for various two-digit manufacturing industries of India for the years 1998–1999 to 2007–2008 using the translog production function specification. Most of the previous research of this kind was undertaken by using either aggregate level time-series or state-wise aggregate cross-section data. The recent availability of factory (plant) level panel data has motivated us to re-estimate the parameters of the production function for the Indian manufacturing using factory-level data. Our results clearly indicate presence of significant scale economies. We observe that the capital-labour elasticity of substitution varies across industries, being a little above one or less than one in nearly half of the cases. A multiple regression analysis has been undertaken with the help of industry-level panel data for the years 1998–1999 to 2007–2008 to find out if the manufacturing growth rate is conditioned by the parameters of the production function. Our results indicate that production function parameters do exert an important influence on the rate of growth.

     

Cost structure and technological change of local public transport: the Kaohsiung City Bus case

This study has developed a translog cost function for the Kaohsiung City Bus (KCB) to analyse its cost structure and economic characteristics, based on monthly data over the time period from January 1996 to December 2000. The empirical results reveal that economies of density in the provision of bus services in Kaohsiung do prevail. The estimated marginal cost, which is less than the average cost but greater than the current bus fare, indicates that the subsidy is necessary. Due to the existence of returns to density (RTD), the KCB could obtain cost-saving benefits by extending its output scale. The KCB production technology is also not neutral. The effects of technological change on the KCB costs suggest that over the period 1996–2000 technological progress did lead to cost saving; the pure productivity growth rate increased from 0.45% in 1998 to 3% in 2000.     

大股东制衡、治理战略与信息披露-来自2003年中国上市公司的证据

麦敕勒(Metzler,1949)指出,对大国的进口行业征收关税可能会降低其国内相对价格,因而减少了它在经济中的产量份额。针对这一观点,本文发展了关于国民生产总值(GDP)转换对数函数系统的一个理论模型,并据此估计美国贸易政策对其行业产量份额的影响。通过采用美国及其经济合作与发展组织(OECD)贸易成员国的行业面板数据,并在控制要素禀赋和技术创新对行业产量份额的影响后,得出了在服装和玻璃行业呈现高关税导致低产量份额的经验证据。在控制了由贸易的政治经济因素导致的内生性及运用各类非关税壁垒代替关税作为测量行业保护的工具后,这些发现也同样稳健。因此,本文的贡献在一定程度上弥补了国际贸易中该领域实证研究方面的空白:证明了麦敕勒悖论理论不再只是一种可能性,而的确在服装业中存在。     

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.     

RETURNS TO SCALE IN RETAIL TRADE*

This paper attempts to estimate genuine scale effects in retail trade from a cross section of retail stores in Israel. This is done by estimating a simple production function for several retail branches and employing the faithful old direct Cobb-Douglas structure with value added as output and labor and capital inputs. And indeed despite the well-known peculiarities of the retail industry, a cross section estimation produces “normal” production-function estimates with reasonable input elasticities. The estimates also identify marked increasing returns-to-scale parameters, higher in food and lower in branches less affected by consumer participation and geographical dispersion. These increasing returns may explain a good part of the increase in sales per unit of inputs observed in time series.     

Choice of the empirical definition of zero in the translog multiproduct cost functional form

The translog cost function is valuable to researchers for empirical analysis in themodelling of indirect cost and profit functions. A flaw of the functional form is in themodelling of zero output values. This study examined the impacts of empirical definition of zero output values on price elasticities, economies of scope and scale, using the translog cost function. Estimation of a system of cost and factor share equations with regularity condition imposed was conducted. Results show that the choice of default values affects policy recommendations.     

Economies of scale in Norwegian electricity distribution: a quantile regression approach

In this article, we investigate scale economies in Norwegian electricity distribution companies using a quantile regression approach. To the best of our knowledge, this is the first attempt to apply this estimation technique when analysing scale economies. We estimate the cost elasticities of the two output components: network length and number of customers, to calculate returns to scale. Our results show large potential of scale economies, particularly for the smallest companies. We also find that returns to scale is increasing over time. These findings have important implications for policymakers when they are deciding the structure of the industry in the future.     

Estimation des Économies D'échelle et de gamme dans de petites coopératives de services financiers: le cas des caisses populaires acadiennes

This study uses accounting data stemming from 80 credit unions affiliated to the "Fédération des caisses populaires acadiennes" to estimate a multi-product translog cost function with the aim to test for the presence of scale and scope economies. The cost model relies on the production approach and the financial services are gathered in four categories of products. The model is completed by three inputs and one control variable, the latter being used to capture the heterogeneity of costs arising from the average wealth of membership. Since the estimated output elasticity of the total cost, 0.89, is statistically less than one, the models detect quite important scale economies. As to scope economies, they are present but the coefficients are weakly significant.     

External Economies in the International Trade Theory: A Survey

The paper surveys the international trade literature on intraindustrial and interindustrial production externalities. It places particular emphasis upon the literature on variable returns to scale (VRS) developed along the Kemp line that the externalities are output–generated, and the economies of scale are external (internal) to individual firms (industry). The discussion touches upon the literature examining the implications of VRS for fundamental trade theorems, trade policies, economic growth, and welfare. The paper extends the survey to writings on the Meade–type interindustrial production externalities.     

External Scale Economies in Turkish Manufacturing Industries

In this study, the relationship between external scale economies (agglomeration economies) and productivity is measured by using Turkish data. The productivity increase can be due to economies from locating closer to other firms in either the same industry (localisation economies) or different industries (urbanisation economies). Localisation economies are proxied by own industry size and urbanisation economies by city population. Productivity (output per worker) is regressed on industry size, city population, and other related variables. A measure of concentration of state enterprises is included in the regressions to control for the possible inefficiencies in public sector firms. The functional form of the estimating equations is derived from the translog production function. As a check, a constant elasticity of substitution (CES) form is also experimented with. Data are cross-section data and come from industrial and production surveys conducted by the State Institute of Statistics of Turkey in 1985. The study finds that agglomeration economies that are robust across different specifications of the agglomeration economy function and production function exist in food products, textiles, and wood products. Urbanisation economies are detected in food products and textiles. In wood products there are localisation economies.     

WELFARE ENHANCING COORDINATION IN CONSUMER COOPERATIVES UNDER MIXED OLIGOPOLY

The recent globalization of world economies has led the retail markets of developed countries towards increasing levels of integration and strategic interdependence. A non negligible share of retail and food markets is currently served by co‐operative societies. Consistently with this trend, the consumer cooperatives have recently experienced increasing levels of integration. The main aim of this paper is to study the welfare effects of coordination among consumer cooperatives competing in quantities in a mixed oligopoly against profit‐maximizing firms. We show that, in absence of agency problems, under increasing or constant returns to scale a higher output coordination of the consumer cooperatives does not affect the total welfare as long as a nonnegative profit constraint holds in these firms. On the other hand, under decreasing returns to scale, the consumer cooperatives contribute more to social welfare when acting on behalf of all consumers. This is because, by coordinating consumers’ preferences, these firms can reduce their market output, thus helping the market to come closer to the first best. All together these results seem to provide an argument in favour of the recent process of integration involving consumer cooperatives in many developed countries.     

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.     

新疆旅游业投入产出分析

本文以新疆2002年和2007年投入产出表为依据,从直接消耗系数和完全消耗系数、感应度系数和影响力系数以及投入产出乘数效应这三方面对新疆旅游业进行投入产出分析后发现,新疆旅游业对新疆经济的推动作用有限,旅游业自身的发展依赖于交通运输业、批发零售业、住宿餐饮业及交通运输设备业的发展,且旅游业的发展并未带来交通运输业的显著发展。     

Trade liberalization and the Mexican steel industry

The impact of the North American Free Trade Agreement (NAFTA) on the competitive positions of Mexican and U.S. steel producers is investigated employing a translog cost function with four inputs (capital, labor, domestic intermediate goods, and foreign intermediate goods) to examine scale characteristics and input substitution in Mexican steel production. Results are consistent with diseconomies of scale at high levels of output and with substitute relationships between all input pairs except labor and domestic intermediate goods. Thus, output growth will likely result in cost reductions for Mexican producers only if the industry reaps significant benefits from substitution of foreign inputs for domestic. Recent increases in Mexico's imports of finished steel have much exceeded those of steel industry inputs, and it therefore does not seem likely that a Mexican cost advantage over steel producers in the United States will soon emerge as a result of economies of scale.     

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.     

Service quality,scale economies and ownership: an econometric analysis of water supply costs

Issues related to service quality are crucial for water utility management and regulation. Omitting these aspects, especially when they are treated as exogenous, can lead to large biases in estimating cost functions as well as to misleading information concerning technology. In this article, we integrate the output multi-dimension in the cost function, considering delivered water volume and service quality as being endogenous. Network-related scale measures and private versus public ownership are investigated with the objective of evaluating how endogenous quality may affect their impact on costs. A translog cost model is estimated from a dataset of US water utilities. It is shown that including the quality level of the delivered services has a significant impact on scale economies and ownership effects. Significant economies of scope confirm the existence of trade-offs between water production and service quality.     

Testing for the Fisher hypothesis under regime shifts: an application to Asian countries

This article aims to provide new insights into trade effects of the Greater Arab Free Trade Area (GAFTA), using an imperfect competition framework. The model combines the new gravity model approach with supply-demand export equations in imperfect competition. In this regard, the role of scale economies, product varieties and expectations is explored. Facing the lack of international data on scale economies, we also develop a translog production system which makes it possible to obtain reliable estimates of this factor. For a more rigorous treatment of the endogeneity problem in the model, we make use of an instrumental GMM panel estimator. Results show limited effects of GAFTA on regional trade in imperfect competition, due to market segmentation and the predominance of inter-industry trade. In addition, the fitted intra-GAFTA trade values are far beyond the actual ones. This suggests that GAFTA countries could benefit from deeper regional trade integration. In this regard, the Arab Spring creates new opportunities to reinforce trade integration as a means of grasping additional trade gains in this area.