modeling economies of scale the case of us electric power companies modeling and validating the existence of technical progress within the neoclassical production function specification has been facilitated through the translog functional form however attempts to separate out the effects of technical progress and returns to scale has been limited this study develops and presents a model for testing the existence of these two separate effects using data from a sample of us electric power companies the analysis found that for these electric utilities there existed increasing returns to scale and technical progress that was energy using but capital neutral however scale effects were found to be a dominant factor in lessening the impact of declining average productivity

economics of scale versus technological change an aggregate product function for switzerland in estimating a production function for an economy constant returns to scale has been a traditionally maintained hypothesis in modelling switzerland s gross output as a function of labor capital and imports a general functional form is selected which displays increasing returns to scale and is not hicks neutral it is a technology which is labor saving import saving and capital using this paper also quantifies the mismeasurements associated with using a constant returns to scale model to estimate such variables as own elasticities of demand elasticities of substitution impacts on factor income and rate of technical progress

agglomeration economies and industrial decentralization the wage productivity trade offs abstract this paper examines the industrial location trade offs between the productivity advantages of the metropolitan center and the lower land and the labor costs in outlying regions within the state of sao paulo brazil the results indicate that while plant productivity is enhanced by the considerable agglomeration economies existing within metropolitan sao paulo firms must pay for these benefits in high wages and land costs offsetting labor cost savings can be achieved by locating in outlying regions the evidence presented in this paper suggests that market forces may lead eventually to a spontaneous decentralization of industry

international comparisons of productivity and its determinants in the natural gas industry the objective of this paper was to evaluate the performance of the natural gas industry using an inter country comparison of productivity level and its determinants three method ologies multilateral tornqvist productivity analysis managerial index system analysis and non parametric efficiency analysis are employed to make a methodological cross checking and to perform diversified analysis from the empirical results we identified the level and growth rate of productivity of individual firms the results also indicated that the korean gas industry has shown a relatively low level of productivity from the results of managerial performance index analysis we found that during the recent years of regulatory changes the final price of gas has decreased dramatically while the productivity growth has not been enough to offset the effect of decreased output price which has resulted in decreased profit we also examine the extent of the allocative scale and managerial efficiency as source components of the overall efficiency based on the performance of best practiced with the results of this study an effective policy measure could be established to improve the productivity and the overall managerial performance in the natural gas industry q 1999 elsevier science b v all rights reserved

a test for subadditivity of the cost function with an application to the bell system stable url http links jstor org sici sici 0002 8282 28198409 2974 3a4 3c615 3aatfsot 3e2 0 co 3b2 rthe american economic review is currently published by american economic association your use of the jstor archive indicates your acceptance of jstor s terms and conditions of use available athttp www jstor org about terms html jstor s terms and conditions of use provides in part that unless you have obtainedprior permission you may not download an entire issue of a journal or multiple copies of articles and you may use content inthe jstor archive only for your personal non commercial use please contact the publisher regarding any further use of this work publisher contact information may be obtained athttp www jstor org journals aea html each copy of any part of a jstor transmission must contain the same copyright notice that appears on the screen or printedpage of such transmission the jstor archive is a trusted digital repository providing for long term preservation and access to leading academicjournals and scholarly literature from around the world the archive is supported by libraries scholarly societies publishers and foundations it is an initiative of jstor a not for profit organization with a mission to help the scholarly community takeadvantage of advances in technology for more information regarding jstor please contact support jstor org http www jstor orgmon jul 2 16 52 19 2007

localization economies vertical organization and trade this paper develops a model of regional production networks based on localization economies i consider an industry with two activities one with location specific external economies the other with constant returns under autarky localization economies imply the formation of an industry center agglomeration drives up wages in the center causing the constant returns activity to disperse to outlying regions trade recreates the regional production network on a global scale i apply the model to data from the mexican apparel industry estimation results on mexico s pre and post trade regional apparel wage structure are consistent with localization economies implications for the north american free trade agreement nafta are discussed this abstract was borrowed from another version of this item

productivity and efficiency of us gas transmission companies a european regulatory perspective on both sides of the atlantic the regulation of gas transmission networks has undergone major changes since the early 1990s whereas in the us the long standing regime of cost plus regulation was complemented by increasing pipe to pipe competition most european countries moved towards incentive regulation complemented by market integration we study the productivity development of a panel of us interstate companies using data envelopment analysis and malmquist productivity indices results are presented for changes in productivity as well as for several convergence tests the results indicate that taking productivity and convergence as performance indicators regulation has been rather successful in particular during a period where overall demand was flat however we argue that a benchmarking based regulation might have brought about stronger convergence lessons for european regulators are twofold first the us analysis shows that benchmarking of european transmission operators would be possible if data were available second our results suggest that in the long run market integration and competition are alternatives to the current european model

productivity growth technical progress and efficiency in their comment subhash c ray and evangelia desli 1997 hereafter rd point out that the specification of the decomposition of the malmquist productivity index used by fare et al 1994 hereafter fgnz is not unique and propose and compute an alternative specification of that decomposition we will discuss additional decompositions at the end of this note but proceed here by comparing the rd decomposition with fgnz based on both conceptual and computational grounds rd provide a discussion of the overall malmquist productivity index including the important issue of when this index is equivalent to the traditional notion of total factor productivity tfp namely under the condition that the reference technology be consistent with constant returns to scale crs as they point out this will yield a measure of tfp even if the true underlying technology is not crs for example both rd and fgnz use the crs reference technology to compute overall malmquist productivity one of the key issues raised is the role of the underlying scale properties of the benchmark technologies used to define and compute both productivity and its components in particular two reference technologies are employed in both rd and fgnz what we refer to as crs and variable returns to scale vrs technologies by construction these technologies are nested the crs technology contains the vrs technology as in figure 1 in rd this nestedness provides the logical basis for our decomposition at a very intuitive level we would argue that these two benchmarks can be used to provide bounds on the underlying true but unknown technology 2 intuitively we see the vrs technology providing a type of convex inner approximation whereas the crs technology provides a type of convex outer approximation thus these two technologies provide alternative benchmarks they do not require that the data satisfy either crs or vrs another possible intuitive interpretation is that the crs captures a perhaps hypothetical long run and the vrs approximates the short run as a reference technology the crs technology has some very useful features for example it captures the notion of maximal

technical efficiency of french nuclear energy plants this article analyses the efficiency of french nuclear energy plants belonging to edf electricity of france from 2004 to 2008 with a dea data envelopment analysis model the convexity model is used to investigate the technical efficiency of a representative sample of nuclear plants the results indicated that some plants have undergone an improvement in technical efficiency while others have regressed in terms of technical efficiency policy implications related to the results are discussed

the competitiveness of the uk aerospace industry porter s five competitive forces model provides an analytical framework for assessing the uk aerospace industry s competitiveness in this article various statistical indicators are used to measure competitiveness based on published data at the industry and firm level supplemented with information from company interviews the indicators include productivity output firm size development time scales labour hoarding exports and profitability the empirical results of this article suggest that over the period 1980 to 2000 the uk aerospace industry improved its competitiveness compared with the usa and the eu

an evolutionary approach to technological innovation in agriculture some preliminary remarks abstract this article proposes an interpretation of the process of technological innovation in agriculture we begin with a criticism to the idea of agriculture as a particular environment in economic analysis we argue that some dynamic concepts from economics of innovation especially as seen by the evolutionary literature can be used as an adequate theoretical reference to study innovation in agriculture we then suggest an interpretation in terms of technological trajectories in order to explain the complexity of the technological regime in agriculture finally we discuss the present stage of transformation in this technological regime and the perspectives of the arising new trajectories

declining city productivity and the growth of rural regions a test of alternative explanations prior to the 1970s the u s witnessed a net flow of migrants from its nonmetropolitan to its metropolitan region since then however a dramatic reversal of this long standing tendency for people to concentrate in metropolitan places has been observed nonmetropolitan places have gained migrants largely as the result of increased outmigration from metropolitan areas an open question has been to what extent the employment profile between metropolitan and nonmetropolitan places parallels that of population this paper introduces a data series compiled from county business patterns that is used to analyze the employment trends for the first time the analysis reveals that not only is total employment growing fastest in nonmetropolitan counties but it also appears that the turnaround in employment growth preceded the reversal in the rate of population increase manufacturing which had faster nonmetropolitan growth rates even during the 195os appears to have led in the development of nonmetropolitan counties this shift of manufacturing has attracted other sectors as well as people to nonmetropolitan places part of the recent growth of nonmetropolitan counties represented nothing more than a continuation of suburbanization or spillover of people and jobs which permitted one more outward bound into adjacent nonmetropolitan counties but there is more to nonmetropolitan development than simply metropolitan spillover nonmetropolitan counties far removed from metropolitan ones are also growing faster than metropolitan counties it is shown that this rural renaissance is part of a general deconcentration

uk regional plant and machinery capital stocks and premature scrapping harris r i d 1997 uk regional plant and machinery capital stocks and premature scrapping reg studies 31 737 750 historically a lack of capital stock data has severely limited the ability to carry out supply side analyses of the british regional economy hence the present paper extends an earlier study to produce uk regional plant and machinery capital stocks for the 1968 91 period in doing so it is necessary to take account of premature scrapping especially during the period after 1977 this was achieved using industry by region data on plant closures which provides a reasonable approximation that is much more reliable than when using figures obtained from interpolating the trend output capital ratio this paper also considers the importance of differing industrial structures on the composition and growth of regional manufacturing capital stock together with why it is important to adjust capital stocks for utilization when estimating supply side relationships based on uk regional data harr

firm turnover restructuring and labour productivity in transition the case of poland this article explores the impact of turnover and restructuring on labour productivity in the polish economy over the period 1988 to 1993 changes in aggregate productivity are decomposed into elements corresponding to productivity growth among survivors market share growth by survivors and the contributions of entering and exiting firms the traditional entry and exit effects begin to work as transition to a market economy progresses however initial productivity improvements are due to changes in market shares of the existing firms following the break up of large enterprises regression analysis shows that changes in the firm level productivity are affected by restructuring and a more competitive economic environment

time series analysis of deregulatory dynamics and technical efficiency the case of the u s airline industry as markets worldwide become less regulated it becomes increasingly possible and timely to establish the presence of an empirical relationship between technical efficiency and market forces compelling agents to economize this article taking an innovative approach to test the hypothesis that competitive pressure enhances efficiency constructs a methodology to examine time series of technical efficiency indices for cointegration and convergence a panel of u s airlines observed quarterly between 1970 and 1990 is used as a case study cointegration results are suggestive of long run relationships between carriers furthermore convergence tests document less dispersion in firm performance over time

parametric analysis of cost inefficiency and the decomposition of productivity growth for regulated firms this paper examines the contributions of technical change scale economies regulation and efficiency on productivity growth in the interstate natural gas pipeline industry following bauer 1990 productivity growth for firms subject to regulation is decomposed into technical change scale economies regulation and efficiency components the data sample consists of 20 pipeline companies and covers the period 1977 to 1987 results indicate that scale economies cost inefficiency and regulation on average accounted for 64 16 and 4 of productivity growth respectively cost efficiency declined over the sample period most of which can be attributed to technical inefficiency

understanding carbon lock in abstract this paper narrative argues that industrial economies have been locked into fossil fuel based energy systems through a process of technological and institutional co evolution driven by path dependent increasing returns to scale it is asserted that this condition termed carbon lock in creates persistent market and policy failures that can inhibit the diffusion of carbon saving technologies despite their apparent environmental and economic advantages the notion of a techno institutional complex is introduced to capture the idea that lock in occurs through combined interactions among technological systems and governing institutions while carbon lock in provides a conceptual basis for understanding macro level barriers to the diffusion of carbon saving technologies it also generates questions for standard economic modeling approaches that abstract away technological and institutional evolution in their elaboration the question of escaping carbon lock in is left for a future paper

the need for policy to address the food system lock in a case study of the finnish context abstract the introduction of synthetic fertilizers transformed the food system into the one we know today in the western world the present paper argues that this transformation has become an irreversible self feeding process referred to as food system lock in which threatens planetary boundaries of nitrogen and phosphorus hence the food security in the future a system in a lock in state can undermine its own existence by deteriorating the capacity to cope with upcoming crises of resource scarcity and environmental instability in this paper the roots of lock in are explored and empirically grounded in the historical narrative of the food system transition in finland in the past 60 years the theoretical framework builds on socio technical studies and the economic theory of increasing returns the aim of the paper is to identify through an evolutionary analysis the processes of increasing returns that have become path inefficient and have reinforced the lock in in the food system three separate but interdependent processes in the production in the policy and institutions and in the supply chain create systematic resistance towards sustainability transition these findings indicate that more attention should be paid at the public policies that are currently too narrow in their scope and do not effectively bridge the entire system from food production to consumption public intervention is critical for the unlocking but individuals in the various parts of the food system are those who create new paths

why are grain legumes rarely present in cropping systems despite their environmental and nutritional benefits analyzing lock in in the french agrifood system grain legume plants fix atmospheric nitrogen in the soil and thus do not need nitrogen fertilizers therefore grain legumes can potentially decrease global warming as nitrogen fertilization is responsible for half of all agricultural greenhouse gas emissions moreover grain legumes have many functional and nutritional properties both as feed and food despite the fact that the european union has granted considerable subsidies to promote grain legume cultivation their production continues to fall and there has been no satisfactory explanation as to why this study provides an answer by showing that a situation of technological lock in has resulted from the co evolution of crop systems based on an agrochemical paradigm public policies and market dynamics that promote cereals this process began with the historical choice by european and french public institutions to relegate grain legumes to feed in direct competition with imported soybeans moreover interrelated factors such as breeding selection public subsidies and food systems have favored increasing returns to adoption for cereals to the detriment of grain legumes finally the evolutionary economics approach used here identified several actions that must be implemented together such as agricultural cost accounting methods nitrogen management institutional innovations and market outlets to promote grain legumes and move towards more sustainable agriculture

efficiency and performance in gas distribution evidence from brazil this article analyses the current state of the gas distribution industry in brazil by identifying the main factors that determine its efficiency in order to test the performance of the industry we have calculated the firms technical efficiency during the period 2001 2009 we analyse whether some economic and technological factors as consumer density load factor or regulation among others have affected the performance of this industry we show that companies serving markets with different customer characteristics diversification have reached higher levels of efficiency and evolved faster moreover the private ownership and price cap regulation are more efficient in relation to public ownership and cost of service regulation these findings are important to support the improvement of the regulation of gas distribution in the brazilian states

increasing returns path dependence and the study of politics it is increasingly common for social scientists to describe political processes as path dependent the concept however is often employed without careful elaboration this article conceptualizes path dependence as a social process grounded in a dynamic of increasing returns reviewing recent literature in economics and suggesting extensions to the world of politics the article demonstrates that increasing returns processes are likely to be prevalent and that good analytical foundations exist for exploring their causes and consequences the investigation of increasing returns can provide a more rigorous framework for developing some of the key claims of recent scholarship in historical institutionalism specific patterns of timing and sequence matter a wide range of social outcomes may be possible large consequences may result from relatively small or contingent events particular courses of action once introduced can be almost impossible to reverse and consequently political development is punctuated by critical moments or junctures that shape the basic contours of social life

corporate failure prediction in the european energy sector a multicriteria approach and the effect of country characteristics this study examines the development of corporate failure prediction models for european firms in the energy sector using a large dataset from 18 countries the construction of the models is based on a multiple criteria decision aid mcda approach taking into account both ordinal criteria and nominal country sector effects the analysis is based on different modeling specifications first traditional financial variables are examined which are then extended with additional country level data related to the economic and business environment as well as data about the energy efficiency policies of the countries and the characteristics of their energy markets and networks the results indicate that energy related attributes have high discriminating power and add valuable information compared to the other attributes

a cluster analysis study based on profitability and financial indicators in the italian gas retail market in the european union the natural gas market is increasingly being liberalized the liberalization process is aimed at leading to lower prices and higher volumes and hence higher consumer welfare this paper focuses on the changes in performance in the natural gas retail market by analyzing the profit and financial position of the companies concerned over the first three years following the market liberalization the balance sheets of 105 italian companies in this sector are analyzed after which a cluster analysis is performed employing the most significant performance indexes the companies are then analyzed within each cluster with respect to age size geographical location and business diversification the results of our analysis show that the majority of companies attained a high level of performance although this positive outcome was mitigated by the gradual decrease of the average values of performance indicators during the period concerned the companies that achieve the best performances belong to longstanding business groups are medium large sized and are located in the north of the country regarding business diversification in the first two years the specialised companies outperformed the diversified companies

an analysis of technology productivity and regulatory distortion in the interstate natural gas transmission industry 1977 1985 the purpose of this paper is to provide the first comprehensive firm level analysis of cost structures and production in the interstate pipeline industry during the transition from price regulation to partial deregulation 1977 85 the regulatory changes during this period were numerous and complex we do not attempt to isolate the impact of any single change in regulation rather we examine how the regulatory environment as a whole affected the industry our study is based on a newly constructed panel of twenty four interstate pipeline firms we give particular attention to the impact of output change technical change scale economies and non optimal input allocation on total factor productivity growth and the implication of the 1978 natural gas policy act partial price decontrol relative to total wellhead price decontrol for residential commercial utility and industrial consumers of natural gas and for the transport industry itself 1998 john wiley sons ltd

nonparametric measurement of productive efficiency in the presence of regulation abstract during the late 1970s and 1980s volatility in the demand for natural gas in the united states created havoc in the industry s transmission sector managers of firms were presented with the task of improving productive efficiency in an uncertain and regulated industry we measure the relative performance of 20 pipelines using data envelopment analysis dea to produce a regulation constrained minimum cost frontier with the results we construct a fisher productivity index fpi results show that despite productive efficiency decline for most years most firms experienced improvement in technical efficiency and technical progress in most years most of the productive efficiency decline was due to scale diseconomies

three perspectives on sustainable food security efficiency demand restraint food system transformation what role for life cycle assessment achieving food system sustainability is a global priority but there are different views on how it might be achieved broadly three perspectives are emerging defined here as efficiency oriented demand restraint and food system transformation these reflect different conceptualisations on what is practically achievable and what is desirable underpinned by different values and ideologies about the role of technology our relationship with nature and fundamentally what is meant by a good life this paper describes these emerging perspectives and explores their underlying values highlights lca s role in shaping these perspectives and considers how lca could be oriented to clarify thinking and advance policy relevant knowledge it argues that more work is needed to understand the values underlying different approaches to the food sustainability problem this can shed light on why stakeholders disagree where there are genuine misunderstandings and where common ground is possible and ways forward agreed

returns to scale concept estimation and analysis of japan s turbulent 1964 88 economy there is policy interest in factoring productivity growth into technical progress and returns to scale components our approach uses exact index number methods to reduce the parameters that must be estimated and allows us to exploit the cross sectional dimension of plant level panel data we show that the same equation can also be used to estimate harberger scale economies and technical progress indicators that require fewer assumptions estimates of the elasticity of scale for japanese establishments in three major industries over 1964 88 are presented our study spans the high growth era of the 1960s two oil shocks and other exogenous shocks il y a interet en politique publique a identifier les composantes de la croissance de la productivite attribuables au progres technique et aux rendements a l echelle l approche utilise les methodes des nombres indices exacts pour reduire les parametres qui doivent etres estimes et pouvoir exploiter la dimension transversale des donnees de panel au niveau de l etablissement on montre que la meme equation peut etre utilisee pour estimer les indicateurs d economies d echelle et de progres technique a la harberger lesquels necessitent un plus petit nombre de postulats on presente des evaluations de l elasticite d echelle pour des etablissements japonais dans trois industries importantes entre 1964 et 1988 l etude couvre la periode de forte croissance des annees 1960 celle des deux chocs petroliers et d autres chocs exogenes

profit productivity and price differential an international performance comparison of the natural gas transportation industry the objective of this paper is to evaluate the performance of natural gas transportation utilities focusing on the three key strategic performance measures of profit productivity and price differential we propose a methodology that expresses the three performance measures in a unified single equation using the edgeworth index the proposed methodology is applied to an international comparison of the performance of 28 natural gas transportation utilities operating in eight countries in which the business environments differ greatly the empirical results show the possible causes of performance differences and may shed some light on the direction of regulatory policy especially for developing countries that have relatively short histories in the natural gas industry such as korea

a cost malmquist productivity index this paper develops a productivity index applicable when producers are cost minimisers and input prices are known the index is inspired by the malmquist index as extended to productivity measurement the index developed here is defined in terms of input cost rather than input quantity distance functions hence productivity change is decomposed into overall efficiency and cost technical change furthermore overall efficiency change is decomposed into technical and allocative efficiency change and cost technical change into a part capturing shifts of input quantities and shifts of relative input prices these decompositions provide a clearer picture of the root sources of productivity change they are illustrated here in a sample of hospitals results are computed using non parametric mathematical programming 2003 elsevier b v all rights reserved

a theory of yardstick competition in the typical regulatory scheme a franchised monopoly has little incentive to reduce costs this article proposes a mechanism in which the price the regulatedfirm receives depends on the costs of identical firms in equilibrium each firm chooses a socially efficient level of cost reduction the mechanism generalizes to cover heterogeneous firms with observable differences medicare s prospective reimbursement of hospitals by using diagnostically related groups is a scheme very similar to the one outlined here

unnatural monopolies in local telephone we attempt to overcome the serious data problems of past telecommunications cost studies by focusing on local exchange carriers lecs with enough degrees offreedom to yield precise estimates our global subadditivity tests show that the cost function is definitely not subadditive the results suggest that the benefits to breaking up the monopoly outputs of existing lecs substantially outweigh the potential losses in efficiency they also support permitting entry and increasing competition in local exchange markets furthermore given the competitive nature of long distance service it is doubtful that the predivestiture bell system was a natural monopoly

economies of scale and scope in expansion of the u s natural gas pipeline network abstract i analyze cost capacity mileage and technical data for 254 u s natural gas pipeline projects over the period 1997 2012 although project costs exhibit economies of scale over the capacity margin and economies of scope over the spatial margin network expansion costs may not exhibit cost economies overall that is proportional increases in both transmission capacity and length in miles may result in a proportional or even greater than proportional increase in expansion costs moreover large projects high capacity pipelines spanning long distances likely require installation of compression horsepower which has direct cost effects my results suggest such projects exhibit significant diseconomies in cost structure as a result pipeline tariffs based on cost of service pricing likely present a disincentive for prospective pipeline customers to commit to long term contracts which are necessary for the pipeline to acquire regulatory permission to build particularly for large long distance expansion projects the implication is that cost of service pricing may inhibit network expansion exacerbating congestion issues

economies of scale and technological progress in electric power production the case of brazilian utilities abstract this paper examined the cost structure of the electricity generation companies in brazil during the period 2000 2010 by using a translog cost function that imposes no restrictions on production technology and allows for the existence of non homotheticity the hypothesis that economies of scale are a typical feature of the generation market in brazil and in general are not exhausted at lower levels of production is not rejected this result supports the vision that indivisibilities restrict efficiency gains from free market competition in the brazilian electricity generation and most of the last restructuring in the industry regulation was based on this assumption furthermore over the sample period technological progress led to cost reductions in electric power supply these technological improvements take the form of both a neutral technological effect as well as a non neutral fuel effect which prevails over the capital and labor saving technical changes

productivity growth in british manufacturing spatial variation in the role of scale economies technological growth and industrial structure this paper investigates the role of scale economies technological growth and industrial structure in creating spatial variation in manufacturing labour and total factor tfp productivity in britain separate estimates of a translog specification are presented for british manufacturing firms located in defined areas of the country over the period 1994 1998 the results show that tfp change due to scale economies and technological growth has been of much less important in influencing the output growth of manufacturing firms than input growth or industrial structure regarding the components of tfp technological growth has been the dominant force at play the analysis of average labour productivity identifies shifts to other factors of production and industrial structure as being the main determinants of change scale economies appear to have had a marginal role the results identify spatial patterns indicating that more favourable locational effects arise for firms in areas adjacent to large urban centre

russian gas exchange a new indicator of market efficiency and competition or the instrument of monopolist abstract russian government sanctioned the first gas trade at the saint petersburg international mercantile exchange spimex in 2012 as a part of the gas industry national strategy federal antimonopoly service fas proposed a reform aimed to boost competition among producers and to increase consumer welfare the proposal included lifting of price floor regulation for gazprom that supposed to be a vital element of transition from the government price regulation to spimex benchmark for over the counter otc segment structural reform of this scale has never happened in russia furthermore there are only descriptive studies in the existing literature this paper aims to fill this gap by testing market efficiency in spimex based on fama s theory with the well established model we test the consistency of gas futures and spot prices for unbiasedness we imply this methodology because in transition to exchange benchmark it is necessary that price is formed under market forces and is not influenced by players who have market power or dominance to make a reasonable conclusion we supplement the simulation by relevant qualitative analysis of liquidity price differentials between contracts and market concentration in the exchange the goal of the paper is to answer whether the exchange price today can be a benchmark and substitute for the state regulated price combined with qualitative analysis we argue that the scheduled deregulation counterintuitively may improve the dominance of gazprom in the domestic market

private information and trade timing this paper investigates the bayesian decision theoretic foundations of the wall street adage that timing is everything one might think that a small risk neutral trader wishes to act immediately upon any private information he possesses i begin with a counterintuitive nding that trade timing doesn t matter for an arrow security as one s expected return per dollar invested is a martingale this timing irrelevance discovery motivates an analysis of general compound securities while timing there is ambiguous i nd that natural monotone likelihood ratio assumptions on both private and public information restore the intuition that one should trade with all due dispatch this abstract was borrowed from another version of this item

a composite cost function for multiproduct firms with an application to economies of scope in banking the composite cost function the authors propose combines a quadratic output structure with a log quadratic input price structure and is well suited for examining economies of scope subadditivity and other important properties of multiproduct firms to compare the composite model with an appropriate set of alternative functional forms they develop a parsimonious but general specification that nests the standard translog cost function the generalized translog cost function a separable quadratic cost function and the composite cost function an application to economies of scope in banking confirms the advantages of the composite model copyright 1992 by mit press

trade effects of scale economies evidence from four eu countries abstract this paper investigates the empirical relationship between the magnitude of scale economies and trade scale economies are directly estimated from a non linear translog production function system these estimates are then introduced in an original supply demand export model the application of this model to four eu countries indicates that exports unambiguously rise with the degree of scale economies these results support schmitt and yu s econ lett 74 2001 127 theoretical expectations

a natural monopoly in natural gas transmission abstract in this article we test for subadditivity in the cost structure associated with transporting natural gas by trans canada pipelines ltd and measure for possible cost savings from increased competition that could be realized by removing the monopoly status granted by the national energy board in measuring subadditivity we apply both the baumol et al contestable markets and the theory of industry structure 1982 and the evans and heckman am econ rev 764 1984 613 procedures our results show evidence of subadditivity in the cost structure and consequently the possible benefits from increased competition resulting from splitting up the monopoly could be offset by the sacrifice of scale efficiencies

a model of competitive stock trading volume a model of competitive stock trading is developed in which investors are heterogeneous in their information and private investment opportunities and rationally trade for both informational and noninformational motives i examine the link between the nature of heterogeneity among investors and the behavior of trading volume and its relation to price dynamics it is found that volume is positively correlated with absolute changes in prices and dividends i show that informational trading and noninformational trading lead to different dynamic relations between trading volume and stock returns

international comparison of bank production characteristics and technological change in this paper we conduct an international comparison of bank production and technological characteristics the comparison is performed using novel evidence on changes in labour demand over the period 1980 89 for banks headquartered in canada france west germany italy japan and the united states the results suggest that there is relatively low substitutability of labour for capital in the production process of these banking organizations significant scale economies were found with regards to the expansion of output and the concomitant increase in labour in addition technological change operated to lower the quantity of inputs needed to produce a given level of outputs and increased the minimum efficient size bank over the sample period many of the production characteristics and technology effects varied significantly across countries these findings imply that intercountry differences in production characteristics and technological change should be explicitly recognized in bank strategic planning

strategic trading in a dynamic noisy market this paper studies a dynamic model of a nancial market with a strategic trader in each period the strategic trader receives a privately observed endowment in the stock he trades with competitive market makers to share risk noise traders are present in the market after receiving a stock endowment the strategic trader is shown to reduce his risk exposure either by selling at a decreasing rate over time or by selling and then buying back some of the shares sold when the time between trades is small the strategic trader reveals the information regarding his endowment very quickly

the effect of incentive reforms upon productivity evidence from the vietnamese rice industry in this study we use region level panel data on rice production in vietnam to investigate total factor productivity tfp growth in the period since reunification in 1975 two significant reforms were introduced during this period one in 1981 allowing farmers to keep part of their produce and another in 1987 providing improved land tenure we measure tfp growth using two modified forms of the standard malmquist data envelopment analysis dea method which we have named the three year window tyw and the full cumulative fc methods we have developed these methods to deal with degrees of freedom limitations our empirical results indicate strong average tfp growth of between 3 3 and 3 5 per cent per annum with the fastest growth observed in the period following the first reform our results support the assertion that incentive related issues have played a large role in the decline and subsequent resurgence of vietnamese agriculture

agglomeration economies in urban manufacturing industries a case of japanese cities abstract the effects of urban agglomeration economies on productivities in two digit manufacturing industries is estimated using the cross section data of japanese cities in 1979 urbanization and localization economies which are major forms of urban agglomeration economies are explicitly separated the estimates of these economies vary considerably among industries light industries receive more productive advantages from urbanization economies than from localization economies but heavy industries experience these economies more from localization economies than from urbanization economies

production technology costs and multiproduct industry structure an application of the long run profit function to the new england fishing industry the long run multiproduct profit function is developed to provide a more general procedure than the static minimum cost function to examine the technological and cost determinants of multiproduct industry structure and the likely form of any market equilibrium in this approach outputs are endogenous and the long run equilibrium levels of quasi fixed factors are endogenously determined the multiproduct structure of the multispecies new england fishing industry and the likely multi

how different are the production functions of the european manufacturing sectors new empirical evidence the neo classical model of international trade assumes that the total factor productivity tfp of a sector is common across countries that returns to scale are constant and that the sectoral production of the countries differs by virtue of the factor endowments in this article we consider whether the differences in production can also be explained by the economies of scale in the national industries and by the technological differences across countries to test this hypothesis we estimate three models proposed in harrigan 1999 with data for eight european union eu member states covering the period 1978 to 1992 and analyse how the tfp changes from country to country

a simulation approach for analysis of short term security of natural gas supply in colombia abstract achieving security of gas supply implies diversifying gas sources while having enough supply transportation and storage capacity to meet demand peaks and supply interruptions devising a strategy for securing gas supply is not straightforward because gas supply depends on complex interactions of production demand and infrastructure and it is exposed to economic regulatory political environmental and technical risks to address this complexity we propose a simulation approach that replicates the structure of the gas supply chain including transportation constraints and demand fluctuations we build and calibrate a computer model for the colombian gas sector and run the model to assess the impact of expanding transportation capacity and increasing market flexibility on the security of supply our analysis focuses on the operation and planned and proposed expansions of the transportation infrastructure because adequate regulation and development of this infrastructure can contribute to increase the security of supply in the gas sector we find that proposed import facilities specifically lng import terminals at buenaventura increase system s security under the current market structure

a general index of technical change this paper outlines a procedure for estimating a general index of technical change within the context of a quite general production technology specifically when panel data are available for firms in an industry time specific dummies can be combined in a nonlinear estimation procedure to yield a general index of technical change that may be both nonneutral and scale augmenting this approach offers numerous advantages over the traditional time trend representation of technical change for example the general index can serve as the basis for analysis of the determinants of technical change results for a sample of 30 electric utilities over the period 1951 78 show that the productivity decline of the 1970s can be attributed primarily to sulphur oxide restrictions and secularly declining capacity utilization due to rapidly increasing peak load demands

systematic effects of capital service price definition on perceptions of input substitution earlier attempts at reconciling disparate substitution elasticity estimates examined differences in separability hypotheses data bases and estimation techniques as well as methods employed to construct capital service prices although these studies showed that differences in elasticity estimates between two or three studies may be attributable to the aforementioned features of the econometric models they have been unable to demonstrate this link statistically and establish the existence of systematic relationships between features of the econometric models and the perception of production technologies generated by those models using sectoral data covering the entire production side of the u s economy we estimate 34 production models for alternative definitions of the capital service price we employ substitution elasticities calculated from these models as dependent variables in the statistical search for systematic relationships between features of the econometric models and perceptions of the sec

productivity growth technical change and economies of scale of korean fossil fuel generation companies 2001 2012 a dual approach abstract this paper examines total factor productivity tfp growth technical change and economies of scale measure of korean fossil fuel power generation companies gencos between 2001 and 2012 for the empirical investigation we estimated the cost function along with specification tests in order to find the most appropriate empirical model empirical results show tfp deterioration technical regress and economies of scale for the study period the optimal size of the korean gencos was also found which is employed in developing policies regarding tfp growth and technical advance

the translog production function and variable returns to scale this paper examines existing methods of estimating the translog production function and provides a general framework that allows for variable returns to scale the model is based on the inverse input demand function and embeds a nonhomothetic production technology previous estimation methods are valid only for homogeneous technologies with fixed scale effects estimation results for u s manufacturing show that neither homotheticity and homogeneity nor constant returns to scale is a proper characterization of the underlying structure of production thereby vindicating the empirical relevance of the inverse demand framework that entails a nonhomothetic technology copyright 1992 by mit press

rational inefficiency adjustment costs and sequential technologies abstract in this paper we propose a novel approach to estimate the rational inefficiency of decision making units in the presence of adjustment costs using sequential definitions of the production technology we show how cost inefficiency can be decomposed into rational and residual inefficiency as well as inefficiency caused by technical change furthermore we estimate lower bounds for the unobserved adjustment costs based on unexploited cost reductions due to rational inefficiency these adjustment costs are used to evaluate the feasibility of exploiting cost reductions caused by residual inefficiency we demonstrate the empirical applicability of our model by estimating and decomposing the cost inefficiency of u s coal fired power plants using panel data which cover the period between 1994 and 2009

agglomeration economies and productivity in indian industry abstract the primary objective of this paper is to examine the extent to which agglomeration economies contribute to economic productivity we distinguish three sources of agglomeration economies 1 at the firm level from improved access to market centers 2 at the industry level from intra industry localization economies and 3 at the regional level from inter industry urbanization economies there is considerable variation in the sources and magnitudes of agglomeration economies between industrial sectors in particular our results indicate that access to markets through improvements in inter regional infrastructure is an important determinant of firm level productivity whereas benefits of locating in dense urban areas do not appear to offset associated costs

productivity growth technical progress and efficiency change in industrialized countries this paper analyzes productivity growth in 17 oecd countries over the period 1979 1988 a nonparametric programming method activity analysis is used to compute malmquist productivity indexes these are decomposed into two component measures namely technical change and efficiency change we find that u s productivity growth is slightly higher than average all of which is due to technical change japan s productivity growth is the highest in the sample with almost half due to efficiency change jel c43 d24 in this paper we apply recently developed

firm location and city size reduced productivity advantages as a factor in the decline of manufacturing in urban areas abstract this paper develops a model of firm location and city size that arrives at theoretical conclusions that differ from those of other authors comparative statics results suggest that changes in national wage levels and productivity levels create no determinate dis advantage for large cities relative to small ones as sites for manufacturing activity increased wage and reduced productivity premiums of large cities however result in unambiguous disadvantages statistical analysis indicates that the productivity advantages of large cities have declined in as many as eight two digit manufacturing industries that provide more than one third of metropolitan production worker employment

international benchmarking of electricity transmission by regulators a contrast between theory and practice benchmarking of electricity networks has a key role in sharing the benefits of efficiency improvements with consumers and ensuring regulated companies earn a fair return on their investments this paper analyses and contrasts the theory and practice of international benchmarking of electricity transmission by regulators we examine the literature relevant to electricity transmission benchmarking and discuss the results of a survey of 25 national electricity regulators while new panel data techniques aimed at dealing with unobserved heterogeneity and the validity of the comparator group look intellectually promising our survey suggests that they are in their infancy for regulatory purposes in electricity transmission relative to electricity distribution choosing variables is particularly difficult because of the large number of potential variables to choose from failure to apply benchmarking appropriately may negatively affect investors willingness to invest in the future while few of our surveyed regulators acknowledge that regulatory risk is currently an issue in transmission benchmarking many more concede it might be in the meantime new regulatory approaches such as those based on tendering negotiated settlements a wider range of outputs or longer term grid planning are emerging and will necessarily involve a reduced role for benchmarking

ownership structure institutional organization and measured x efficiency efficiency measurement has become a very popular field in applied economics in recent years and with this interest there has been a large intellectual investment in refining the empirical methods available to researchers in the area in this paper we relate these developments to harvey leibenstein s original 1966 insight into the psychological ideas underlying the notion that economic agents may not achieve maximal efficiency in their productive decisions and behavior of course it is always possible to argue that apparent inefficiency only arises from a failure of the observer to realize what it is that is being maximized however we shall evade this easy escape route into nonfalsifiable hypothesizing and instead shall take at face value the fact that too many empirical studies have come up with substantial measures of inefficiency for us to ignore its importance for normative economics

the dynamic implications of increasing returns technological change and path dependent inefficiency this paper addresses the issue of path dependent selection and inefficiency counterfactual methods and the empirical evidence employed in this research trajectory the general message is basically that the theoretical argument to prove path dependent inefficiency is relatively straightforward while empirical demonstrations as well as the analysis of welfare implications are much more difficult in the first section we briefly state the basic argument explaining how localized learning leads to an incomplete exploration of the variety distribution of a technology we then synthesize the most interesting historical studies which get potential regret results and ask whether these results suggest a large welfare loss to try to answer this question we start from the critical arguments of liebowitz and margolis to discuss the theoretical and empirical difficulties of establishing path dependent inefficiency