battese coelli estimator with endogenous regressors abstract we provide a framework for dealing with the endogeneity problem in the battese coelli estimator for productive efficiency measurement

competition between private and public schools vouchers and peer group effects a theoretical and computational model with tax financed tuition free public schools and competitive tuition financed private schools is developed students differ by ability and income achievement depends on own ability and on peers abilities equilibrium has a strict hierarchy of school qualities and two dimensional student sorting with stratification by ability and income in private schools high ability low income students receive tuition discounts while low ability high income students pay tuition premia tuition vouchers increase the relative size of the private sector and the extent of student sorting and benefit high ability students relative to low ability students

parametric efficiency tests economies of scale and input demand in u s electric power generation duality theory has been applied increasingly in recent years to study the structure of production a major advantage of using duality theory is that systems of input demand equations can be derived by simple differentiation facilitating the use of flexible functional forms also use of duality theory makes it possible to choose a representation of the technology which has desirable properties for estimation such as exogeneity of the regressors however the use of a dual representation of production structure is appropriate only if the corresponding maintained hypothesis concerning economic behavior e g cost minimization or profit maximization is valid the perceived advantages of the dual approach to studying production structure have led to some applications in which the maintained hypothesis concerning economic behavior is unlikely to be appropriate for example neoclassical cost functions have been used to study the characteristics of production in regulated industries despite an extensive theoretical literature indicating that a profit maximizing regulated firm would not minimize costs subject to market prices 2 in this paper we propose a generalized cost function that retains the principal advantages of the neoclassical cost function but does not require that cost minimization subject to market prices be imposed as a maintained hypothesis in our model firms are assumed to base their production decisions on unobservable shadow prices which reflect the effects of regulation on the effective prices of inputs parametric tests for cost minimization are obtained by expressing shadow prices as functions of market prices the generalized cost function is estimated with data for regulated electric utilities the parametric restrictions corresponding to cost minimizing behavior subject to market prices are rejected implying that the use of a neoclassical cost function is not appropriate in this application 3

endogeneity in panel stochastic frontier models an application to the japanese cotton spinning industry abstractwe present a panel stochastic frontier model that handles the endogeneity problem this model can treat the endogeneity of both frontier and inefficiency variables we apply our method to examine the technical efficiency of japanese cotton spinning industry our results indicate that market concentration is endogenous and when its endogeneity is properly handled it has a larger negative impact on the technical efficiency of cotton spinning plants we find that the exogenous model substantially overestimates efficiency in concentrated markets

inferring the nutrient content of food with prior information given measurements on the nutrient content of the u s food supply and a coherent reduced form empirical model of the demand for foods we can analyze the effect of agricultural farm and food policy on nutrition using unpublished documents from the hnis estimates of the percentages of seventeen nutrients supplied by twenty one foods were compiled for the period 1952 1983 the bayesian method of moments is applied to this data set to obtain a proper prior for the purpose of drawing year to year inferences about the nutrient content of the u s food supply for the period 1909 1994 information theory and the kullback leibler cross entropy criterion are used to formalize the inference problem this abstract was borrowed from another version of this item

stochastic estimation of firm inefficiency using distance functions econometric estimation of allocative and technical efficiency has frequently been carried out using a shadow cost function and its associated share or demand equations since the problem is formulated in terms of shadow prices the effect of allocative inefficiency on input usage must be computed indirectly from input share or demand equations as an alternative approach we derive and estimate an input shadow distance system comprising the dual shadow input distance function and the price equations derived from the shadow cost minimization problem estimated shadow quantities provide direct estimates of the effect of allocative inefficiency on input usage one can also easily calculate firm and time varying technical inefficiency by decomposing the residuals we also compute returns to scale and the cost savings obtained by eliminating both types of inefficiency our approach is illustrated using a panel of u s railroads both the cost function and the distance function are valid representations of multioutput technologies the arguments of the cost function are output quantities and input prices while the arguments of the distance function are input and output quantities the input distance function measures the extent to which the firm is input efficient in producing a given set of outputs while the cost function assumes cost minimization by a firm which is input efficient the shadow cost function is a generalization of the cost function and depends on output quantities and shadow internal to the firm input prices rather than actual market input prices thus the shadow cost function assumes shadow cost minimization but not actual cost minimization this function has frequently been employed in fixed effects estimation of allocative efficiency ae and technical efficiency te an observed input vector is technically efficient if it is on the isoquant of the observed output vector an input vector is allocatively efficient if the radial contraction of the input vector to the isoquant is cost minimizing identification of parameters that measure ae can be achieved by the estimation of a shadow cost system comprising the actual cost equation and the share or input demand equations which are expressed in terms of shadow prices and output quantities shadow cost systems have been estimated by atkinson and halvorsen 1984 sickles good and johnson 1986 eakin and kniesner 1988 kumbhakar 1992 and atkinson and cornwell 1994 among others given panel data the deviation of shadow from actual input prices can be measured by price specific inefficiency parameters that may vary across firms and over time however the estimation of the effect of

the governance of sustainable socio technical transitions a quasi evolutionary model of socio technical transitions is described in which regimes face selection pressures continuously differentiated transition contexts determine the form and direction of regime change in response to these pressures the articulation of pressures and the degree to which responses are coordinated and based on resources available within the regime define the transition context four alternative contexts are described endogenous renewal re orientation of trajectories emergent transformation and purposive transitions agency and power in the governance of regime transformation are analysed power to affect change depends on regime membership the distribution of resources for change and expectations

comparing malmquist and hicks moorsteen productivity indices exploring the impact of unbalanced vs balanced panel data abstract we explore the effect of balancing unbalanced panel data when estimating primal productivity indices using non parametric frontier estimators first we list a series of pseudo solutions aimed at making an unbalanced panel balanced then we discuss some intermediate solutions e g balancing 2 years by 2 years furthermore we link this problem with a variety of literatures on infeasibilities statistical inference of non parametric frontier estimators and the index theory literature focusing on the dynamics of entry and exit in industries we then empirically illustrate these issues comparing both malmquist and hicks moorsteen productivity indices on two data sets in particular we test for the differences in distribution when comparing balanced and unbalanced results for a given index and when comparing malmquist and hicks moorsteen productivity indices for a given type of data set the latter tests are crucial in answering the question to which extent the malmquist index can approximate the hicks moorsteen index that has a total factor productivity tfp interpretation finally we draw up a list of remaining issues that could benefit from further exploration

estimation of a forward looking monetary policy rule a time varying parameter model using ex post data abstract in this paper we consider estimation of a time varying parameter model for a forward looking monetary policy rule by employing ex post data a heckman type 1976 the common structure of statistical models of truncation sample selection and limited dependent variables and a simple estimator for such models annals of economic and social measurement 5 475 492 two step procedure is employed in order to deal with endogeneity in the regressors this allows us to econometrically take into account changing degrees of uncertainty associated with the fed s forecasts of future inflation and gdp gap when estimating the model even though such uncertainty does not enter the model directly we achieve efficiency in estimation by employing the standardized prediction errors for inflation and gdp gap as bias correction terms in the second step regression we note that no other empirical literature on monetary policy deals with this important issue our empirical results also reveal new aspects not found in the literature previously that is the history of the fed s conduct of monetary policy since the early 1970s can in general be divided into three subperiods the 1970s the 1980s and the 1990s the conventional division of the sample into pre volcker and volcker greenspan periods could mislead the empirical assessment of monetary policy

on the estimation of zero inefficiency stochastic frontier models with endogenous regressors in this paper we investigate endogeneity issues in the zero inefficiency stochastic frontier zisf models by mean of simultaneous equation setting specifically we allow for one or more regressors to be correlated with the statistical noise a modified limited information maximum likelihood liml approach is used to estimate the parameters of the model moreover the firm specific inefficiency score is also provided limited monte carlo simulations show that the proposed estimators perform well in finite sample

the role of policy in energy transitions lessons from the energy liberalisation era the aim of this paper is to discuss the period of energy privatisation and liberalisation which began in the 1980s within its wider historical context the key issues are what has been learned from this recent period and how significant is it in the light of an energy transition to low carbon energy system by 2050 energy liberalisation has led to positive and globally widespread but modest efficiency gains but a lack of clearly visible direct benefits to households in many countries it has significantly improved the governance of monopoly utilities via independent regulators the prospects for competition and innovation and the quality of policy instruments for environmental emissions control through the emergence of trading mechanisms we conclude that it is not liberalisation per se that will determine the movement towards a low carbon energy transition but the willingness of societies to bear the cost which will be significant no matter what the extent of liberalisation

does competition among public schools benefit students and taxpayers tiebout choice among districts is the most powerful market force in american public education naive estimates of its effects are biased by endogenous district formation i derive instruments from the natural boundaries in a metropolitan area my results suggest that metropolitan areas with greater tiebout choice have more productive public schools and less private schooling little of the effect of tiebout choice works through its effect on household sorting this finding may be explained by another finding students are equally segregated by school in metropolitan areas with greater and lesser degrees of tiebout choice among districts

governing transitions cases and insights from two periods in the history of the uk gas industry the paper aims to inform historically the analyses of future sociotechnical transition pathways in the electricity sector particularly those developed by the transition pathways to a low carbon economy project it also aims to inform the theoretical approach to transitions by focusing on key decisions at branching points that led to transitions in the uk gas energy services regime which occurred under different governance patterns the first historical case study covers the market led transformation of the manufactured gas regime from 1877 to 1914 which developed the end uses of gas beyond lighting to include cooking and extended access to working class consumers the second case study covers the period from 1948 to 1977 historically reconstructing the transition from town gas to natural gas this state led and coordinated conversion to natural gas was preceded by a period of destabilisation of the manufactured gas regime the co existence of several niche technologies and the hybridisation of the key actors and technological infrastructures of the incumbent regime comparing the cases provides insights for future energy service transitions by addressing the significance of power trust and networking in the decision making processes involved in the governance of energy transitions

the decline in the number of school districts in the u s 1950 1980 between 1950 and 1980 the number of school districts fell from 83 642 to 15 987 data for the fifty states for 1950 1960 1970 and 1980 are used to identify the factors that contributed to this decline the focus is on the tradeoff between cost savings through scale economies a few large districts and a diverse population s demand for choice in public schooling many small districts we find that much of the decline in the number of school districts has resulted from 1 the decline in the farm population and increase in population density which has made it easier to take advantage of scale economies 2 the growing importance of state aid which reduces quality variation among districts within a state and 3 the increase in the fraction of teachers that belong to the national education association teacher s union which may reflect increased political influence used to lower the costs of organizing

energy reform in mexico a new development model or modernization of statism abstract this paper analyses the results of the reform to the mexican energy sector from 1988 to 1994 the period during which former president salinas de gortari changed the energy policy strategy without modifying its objectives results were irregular since efforts were asymmetric which generated new problems although the energy sector has opened up to private capital the process has been far from spectacular even before nafta the integration of this sector between mexico and the usa was already under way nafta accelerated this process and reduced mexico s margin for manoeuvre in defining and formulating its own energy policy political and economic factors prevented salinas from effecting a more aggressive liberalization these factors however will be less significant during the zedillo administration which foreshadows the end of the statist modernism which has characterized this period

parametric estimation of technical and allocative inefficiency with panel data the error components approach to estimating allocative inefficiency imposes restrictive assumptions on the distributions of the errors and functional form the parametric approach does not require special assumptions about the error distribution or technology but typically assumes technical efficiency or restrictive functional forms the parametric approach also allows for systematic firm responses to shadow prices the authors generalize the parametric approach to a panel data setting and show that input and firm specific allocative inefficiency as well as firm specific technical inefficiency can be identified and estimated using a flexible functional form this is demonstrated empirically with an application to u s airlines copyright 1994 by economics department of the university of pennsylvania and the osaka university institute of social and economic research association

static efficiency decompositions and capacity utilisation integrating economic and technical capacity notions starting from existing static decompositions of overall economic efficiency on nonparametric production and cost frontiers this article proposes more comprehensive decompositions including several cost based notions of capacity utilization furthermore in case prices are lacking we develop additional decompositions of overall technical efficiency integrating a technical concept of capacity utilization these new efficiency decompositions provide a link between short and long run economic analysis and in empirical work avoid conflating inefficiency and differences in capacity utilization an empirical analysis using a monthly panel of chilean hydro electric power plants illustrates the potential of these decomposition proposals

gmm estimation of stochastic frontier model with endogenous regressors a convenient and simple gmm procedure for estimating stochastic frontier models in the presence of endogenous regressors is proposed monte carlo simulations show that the proposed estimator works very well in finite samples we apply the proposed method to panel data of norwegian dairy farms to illustrate the usefulness of the proposed approach

socio technical analysis of the electricity sector of mexico its historical evolution and implications for a transition towards low carbon development abstract the electricity sector of mexico has been found itself in continuous transitions since its beginning in the 19th century however the historical reform to the sector that recently took place together with new energy market configurations around the globe may pose an important challenge to transitioning towards a low carbon sector the work presented here was aimed at understanding in a qualitative manner the complex interactions between the main social technical and environmental aspects that have guided the sector in the past their influence on the current structure and its future development through the application of the multi level perspective mlp with a governance and agency perspective additionally the work tried to elucidate the implications of the incumbent position of the natural gas industry and the possibilities for low carbon technologies the conclusions remark the importance of previous sector configurations in the present structure the important role of government in promoting low carbon technologies together with investment by market actors and the possible window of opportunity that the natural gas industry in mexico may provide to low carbon energy technologies

us banking efficiency 1984 1995 abstract we estimate the time varying average efficiencies of the us banks during 1984 1995 with four different efficiency estimators using these four series of efficiency estimates we make a multivariate kalman filter analysis to examine the efficiency trend in us banks during this period

the destabilisation of existing regimes confronting a multi dimensional framework with a case study of the british coal industry 1913 1967 because innovation studies are oriented towards novelty scholars in this field have paid less attention to the destabilisation of existing regimes this paper discusses four views on industry destabilisation and presents an encompassing conceptual framework which addresses interactions between the build up of external pressures industry response strategies and the gradual weakening of commitment to existing regime elements we confront the framework with an in depth longitudinal case study of the british coal industry 1913 1967 specific conclusions are developed about different degrees of regime inertia the ebb and flow of external pressures the relative importance of economic and socio political pressures and interactions between them

the financing of the mexican electrical sector abstract this paper analyses the financial pattern of the mexican electricity sector its financial limits in both development and modernization of this strategic sector and the main options for resolving this financing problem including the proposals of the president fox government our allocation of risks and profitability analysis explain the present success in attracting private investments to expand both generation and transmission capacity through blt and ipp projects the financial limitation is nevertheless the low self financing of federal electricity commission cfe that will make it very difficult to obtain financing to fulfil blt and ipp contract compromises and to invest large sums in the expansion and modernization of the electricity sector the main options to resolve the financial problems of the mexican electricity sector are 1 the improvement of the present financial pattern 2 the opening of generation and supply segments to private capital with the preservation of the vertically integrated state owned utilities and 3 the proposals of the president fox economic transition team that consider the opening of generation and supply segments the setting up of an independent state owned company to operate both the electrical dispatching and a power pool and finally the transformation of cfe into a holding of state owned utilities of generation distribution and transmission

decent rural employment and farm production efficiency empirical evidence from tanzania and ethiopia promoting decent rural employment by creating new jobs in rural areas and upgrading the existing ones could be one of the most efficient pathways to reduce rural poverty this article systematically investigates the impact of decent rural employment on agricultural production efficiency in ethiopia and tanzania the analysis applies an output oriented distance function approach with an estimation procedure that accounts for different technological demographic socioeconomic institutional and decent rural employment indicators data of the 2011 round of living standards measurement study integrated surveys on agriculture for the two countries are used and a set of indicators is derived to proxy core dimensions of decent rural employment the findings of our analysis show that decent rural employment contributes to agricultural production efficiency

the mexican electricity sector policy analysis and reform 1992 2009 this article analyses the cause effect relation of the structural reform in the mexican electricity sector called the public electricity service act from 1992 to 2009 one of the main arguments of the reform is to attract private investment in order to reduce the financial load of the government in infrastructure for the development of the national electric power system by means of six modalities power self supply cogeneration small power production independent power production power export and power import the article presents the global context of reforms adopted in 1990 the major policies and events are presented in chronological order before and after reform in addition it analyses the new institutional framework the evolution of modalities technologies of electricity generation and tariffs the main conclusion is that the result of reform could be considered a partial progress the independent power production modality shows greater participation while power self supply and cogeneration are lower the subsidy policy is maintained progress is needed in policies and strengthening and also in updating regulatory and normative frameworks

the productivity of schools and other local public goods producers abstract i construct an agency model of local public goods producers in which households make tiebout choices among jurisdictions in a world of imperfect information and costly residential mobility i examine producers effort and rent under local property tax finance and centralized finance i show that if there are a sufficient number of jurisdictions conventional local property tax finance can attain about as much productivity as a social planner with centralized finance can even if the social planner is armed with more information than a real social planner could plausibly have the key insight is that decentralized tiebout choices make some information the social planner would need verifiable and other information unnecessary

misspecification in allocative inefficiency a simulation study we make an extensive simulation analysis in order to investigate the consequences of ignoring the potentially complex and data dependent effects of allocative inefficiency on the estimation of stochastic frontier panel data models generally system estimators perform worse than single equation estimators this result holds even when we approximate the allocative inefficiency

a distribution free stochastic frontier model with endogenous regressors abstract we provide a guideline for estimating a distribution free panel data stochastic frontier model in the presence of endogenous variables in particular we consider variations of the within estimator of cornwell et al 1990 to allow endogenous regressors

profit maximization returns to scale and measurement error a nonparametric analysis of agricultural production behavior was conducted for each of the contiguous forty eight states for the period 1956 82 under the joint hypothesis of profit maximization convex technology and nonregressive technical change tests were conducted in each state for profit maximization and for constant returns to scale although considerable variability was observed among states measurement errors of magnitudes common in secondary data yielded test results fully consistent with the profit maximization hypothesis in all states with complete output and input data copyright 1992 by mit press

feasible estimation of firm specific allocative inefficiency through bayesian numerical methods both the theoretical and empirical literature on the estimation of allocative and technical inefficiency has grown enormously to minimize aggregation bias ideally one should estimate firm and input specific parameters describing allocative inefficiency however identifying these parameters has often proven difficult for a panel of chilean hydroelectric power plants we obtain a full set of such parameters using gibbs sampling which draws sequentially from conditional generalized method of moments gmm estimates obtained via instrumental variables estimation we find an economically significant range of firm specific efficiency estimates with differing degrees of precision the standard gmm approach estimates virtually no allocative inefficiency for industry wide parameters copyright 2009 john wiley sons ltd

transition pathways for a uk low carbon electricity future abstract achieving long term targets for greenhouse gas emissions reductions such as the uk s legally binding target of reducing its emissions by 80 by 2050 will require a transition in systems for meeting and shaping energy service demands involving radical substitution to low carbon supply technologies and improvements in end use energy efficiency this paper describes the development and high level analysis of a set of transition pathways to a uk low carbon electricity system explaining key features of the core pathways developed and the distinctiveness and value of the approach the pathways use an action space concept to explore the dynamic interactions between choices made by actors which are influenced by the competing governance framings or logics that different actors pursue the paper sets out three core transition pathways market rules central co ordination and thousand flowers in which market government and civil society logics respectively dominate it summarises the key technological and institutional changes in these pathways and the roles of actors in bringing these about this leads to an identification of the key risks to the realisation of each of the pathways and of the challenges for individuals businesses social movements and policy makers in taking action to bring them about and sustain them

heterogeneity stratification and growth macroeconomic implications of community structure and school finance this paper examines how socioeconomic stratification and alternative systems of education finance affect inequality and growth agents interact through local public goods or externalities school funding neighborhood effects and economywide linkages complementary skills knowledge spillovers sorting families into homogeneous communities often minimizes the costs of existing heterogeneity but mixing reduces heterogeneity faster integration therefore tends to slow down growth in the short run yet raise it in the long run a move to state funding of education presents society with a similar intertemporal trade off local and global complementarities play major roles in determining the efficient social and educational structures copyright 1996 by american economic association

endogeneity in stochastic frontier models copula approach without external instruments this papers considers an alternative estimation procedures for estimating stochastic frontier models with endogenous regressors when no external instruments are available the approach we propose is based on copula function to directly model the correlation between the endogenous regressors and the composed errors estimation of model parameters is done using maximum likelihood monte carlo simulations are used to assess and compare the finite sample performances of the proposed estimation procedures