The impact of regulation on productivity growth: An application to the transmission sector of the interstate natural gas industry

We estimate a regulated cost function to examine the contributions of technical change, scale economies, and regulatory bias to productivity growth in an eleven-year, twenty-firm panel of interstate natural gas pipeline companies. We derive the unregulated cost function from the regulated cost function to produce estimates of movements in the unconstrained production technology. We find that the regulation constraint is binding in most years and that scale economies explain 38 percent more growth in the unconstrained production space than they do in the regulation-constrained production space.We are grateful to Gary Biglaiser, David Guilkey, C. A. Knox Lovell, and Helen Tauchen for their suggestions, and to Karen Bauer, Philip Budzik, Ronald Colter, and Mary Streitwieser for their assistance in compiling the data sample. We are also grateful to the participants at the Georgia Productivity Workshop and two anonymous referees for their comments and suggestions.     

Public information as a deterrent to environmental infractions

This paper examines the effect of inflation on total factor productivity growth (TFP), using time-series data for every two digit Greek manufacturing industries. In order to do the above a translog flexible cost function is estimated and used to decompose TFP growth into scale economies, inflation and technical change. The advantage of estimating a very general and flexible cost function is that it allows us, for the first time, to examine empirically a large number of significant relationships between TFP growth and economies of scale, inflation and technical change. The main conclusion drawn from this analysis is that inflation reduces TFP growth in a way, which is sizeable. Furthermore, using standard causality test the direction of causality between inflation and TFP growth was tested at the manufacturing level.     

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.     

Economies of scale in public education: an econometric analysis

This article investigates the sources of scale economies in the production of public education. The relationship between the average cost of producing educational output and school characteristics including school and district size is estimated using a neoclassical cost function. The empirical analysis used panel data from Utah school districts and estimates the function using the covariance and error component models after making necessary corrections for heteroskedasticity and autocorrelation. The uncorrected fixed effects model generates a significant negative coefficient on district size in both the cost and expenditure functions; the coefficient on number of students has the hypothesized sign but is not significant in either equation. After making various corrections for autocorrelation and heteroskedasticity, the coefficients have the correct signs and are significant in all equations. Thus, it is concluded that scale economies arise from both sources but that the evidence is stronger for district size.     

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.     

Inefficiency in the Spanish Cooperative Banking Sector

This paper researches X-inefficiency and scale economies in Spanish cooperative banking between 1988 and 1996, using the stochastic cost frontier methodology. The Translog cost function, with three outputs and three inputs, is used to measure X-inefficiencies across time and size. During this period of time there is no important reduction in inefficiency levels, so deregulation and internationalization has little effect on the Spanish cooperative banking market. We can see that large cooperative banks are less inefficient than small ones, indicating that it would be convenient to increase the size of these kinds of banks in order to reduce inefficiencies in this sector. We also find scale economies during this period.     

Economies of Scale in Australian Banks 1978–1990

This paper examines economies of scale in Australian banks. A bank multi-product cost function is estimated using a translog functional form with data drawn from twelve banks spanning the period 1978 to 1990. Different formulations of the model are estimated. Results prove sensitive to estimation assumptions and data definitions however they support the presence of economies of scale for Australian banking in this period     

Book Reviews

This article examines the behavior or long-run average cost when the firm knows it faces pecuniary economies or diseconomies or scale and has other than a constant-returns-to-scale production function. The central issue is the conditions under which the scale properties of the production function will or will not dominate the pecuniary effects of changing input prices.     

Globalization challenges for the Mexican textile industry

The Doha round and full integration of the textile industry into the GATT have the potential to dramatically affect the Mexican textile industry. This study investigates the nature of scale economies and input relationships for that industry using a cost function with capital, labor, domestic intermediate goods, and imported intermediate goods as inputs. The findings suggest that significant economies of scale exist, and that most inputs are substitutes, although for some years some inputs are complements. Increased domestic input sensitivity to the price of foreign inputs may present challenges for the industry as it struggles to be internationally competitive.     

Off-farm labour and the structure of US agriculture: the case of corn/soybean farms

While the growing importance of off-farm earnings suggests large benefits accrue to farmers from efforts to expand off-farm income opportunities, economic well being also depends on greater efficiency. To comprehensively gauge the economic health of farm operator households' off-farm income is interpreted as an output along with corn, soybeans, livestock and other crops. To accomplish this task two related methodologies were used. First, using 2000 data, a multi-activity cost function was set up to analyse labour allocation decisions within the farm operator household and also to estimate returns to scale and scope. Second, using 1996–2000 data, an input distance function approach was followed to estimate returns to scale, cost economies and technical efficiency – and the relative performance of farm operator households with and without off-farm wages and salaries compared. The cost function and input distance function results both suggest that off-farm outputs and inputs can be modelled in a multi-activity framework and involve significant economies of scope.     

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.     

Economies of scale and scope in Flemish secondary schools

This study estimates a multiproduct translog cost function for the entire population of 1011 Flemish secondary schools in order to determine the degree of ray and product specific (dis)economies of scale as well as the degree of (dis)economies of scope. Three types of schools and seven major study fields can be distinguished. Student loads in these study fields are used as outputs produced by the schools. Evidence is found for ray economies of scale for the three types of schools, even at output levels of 300% of the actual means. Although the cost elasticities of six out of seven outputs are close to zero, most of the values indicating the degree of product specific economies of scale are negative (suggesting diseconomies of scale). However, this can be explained by the considerable scope effects which are incorporated in the definition of the product specific economies of scale.     

Cost structure,technological change,and productivity growth in the greek banking sector

This paper first empirically investigates the cost structure of the Greek banking sector. Secondly, it provides measures of economies (diseconomies) of scale and quantifies technical change and its sources. Finally, this paper measures total factor productivity growth and identifies its sources. Bank production is presented with two different approaches (the intermediation and the production approach) which are used to specify a translog cost function. The two different translog cost models are estimated through the full information maximum likelihood method of estimation on pooled time series and cross sectional data. The results obtained are not significantly affected by model specification. Both models indicate significant economies of scale and negative annual rates of growth in technical change and in total factor productivity.     

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.     

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.     

Productivity growth in passenger-bus transportation: A heteroskedastic error component model with unbalanced panel data

This paper considers an econometric approach to measure total factor productivity (TFP) growth and technical change (TC) for 31 publicly-owned passenger-bus companies in India during 1983–1987. A translog variable cost function is used to represent the production technology. Firm heterogeneity is incorporated in the cost function using an error component model with firm-specific variances. TFP growth is decomposed into TC and economies of scale components. The TC component is further decomposed into pure, non-neutral, scale, and quasi-fixed factors/network components. An ownership group-wise comparison reveals that the public undertakings exhibit the highest rate of productivity growth, followed by the units operated by the state and local governments. The main source of TFP growth for the public undertakings and government-operated units is economies of scale, while the main source of falling TFP growth for corporations is technological regress.     

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)     

Mark-ups, economies of scale and the role of knowledge spillovers in OECD industries

Using R&D-based models of economic growth as a foundation, this paper argues that market-driven knowledge creation is necessarily linked as an engine of productivity growth to economies of scale and market-power. A cost function and factor demand model is applied to a cross-country industry data set to study market-power, economies of scale and the role of knowledge in an integrated approach. Empirical results reveal the presence of market-power and economies of scale in all of the industries investigated. R&D and spillovers explain some of the productivity growth observed. Spillovers are identified as an external source of economies of scale.     

Scale properties and input substitution in mexican electrical equipment manufacturing

This paper investigates the existence of scale economies in the Mexican electrical equipment industry and estimates direct and cross price input demand elasticities using a translog cost function. Although the estimated value of the cost elasticity was consistent with economies of scale, it was significantly less than 1 only at a significance level slightly greater than 5 percent. The estimated cross price elasticities indicated that all of the inputs were substitutes. Nevertheless, while lower trade barriers under the North American Free Trade Agreement, ceteris paribus, may have a short-term adverse effect on the demand for labor in this industry by increasing imports of cheaper capital and intermediate goods, the relatively low values for E_LK and E_LM also support the conclusion that the impact on employment may be relatively small.This project was supported by the Faculty Development Leave Program at the University of Texas at San Antonio.