the demand for post compulsory education in the uk and the effects of educational maintenance allowances in this paper the author develops a model of investment in postcompulsory schoolin g based on human capital theory the model is estimated using data on a sample of sixteen and seventeen year olds derived from the family expenditure survey the results reveal significant differences in the factors influencing enrollment in postcompulsory education between m ales and females mot notably household income is an important deter minant of educational participation for females but not for their ma le counterparts on the basis of these results the author assesses t he effects of the introduction of educational maintenance allowances on participation rates in the united kingdom

multinational operation ownership and efficiency differences in the international oil industry abstract although state involvement in market systems often leads to inefficiency this influence in the oil industry is not dwindling due to strong growth of some state oil companies based on this background there are concerns about how state firms can continue to stay relevant in the international oil industry by offsetting inefficiencies due to state control this study assesses the effects of multinational operations on the performance of oil firms this is achieved by comparing productive and scale efficiencies of state and private oil companies as well as state multinationals and private multinationals a dataset of 50 firms each year from 2001 to 2010 reveals that although multinational operation is important in reducing productive inefficiencies of state firms it does not mitigate scale inefficiencies of state owned firms state firms should therefore make multinational operations a key policy direction since this will provide a transformative agenda towards equally competing with their private counterparts however better efforts need to be paid in reducing scale inefficiencies that are pervasive among state owned oil firms providing better controls on firm size will provide better drive towards future efficient production levels

equivalence and implementation of alternative methods for determining returns to scale in data envelopment analysis abstract this paper discusses alternative methods for determining returns to scale in dea the methods for estimating returns to scale in dea as developed by banker 1984 banker charnes and cooper 1984 and banker and thrall 1992 are proved to be conceptually equivalent to the two stage methods of fare grosskopf and lovell 1985 when their assumptions apply here the emphasis is on the ccr model of dea and very simple methods are introduced for determining returns to scale locally with this model by reference to banker s concept of most productive scale size

a nonparametric cost approach to scale efficiency starting with farrell fieldhouse 1962 a host of notiparametric models have been developed for calculation of scale efficiency a common property of these models is that they are specified in terms of input output data duality theory has taught us that technological characteristics may be analyzed from either the primal or the dual cost side the purpose of this paper is to introduce a nonparametric dual method of calculating scale efficiency

human capital formation and local economic performance bradley s and taylor j 1996 human capital formation and local economic performance reg studies 30 1 14 this paper is concerned with the interaction between the vocational education and training system vet and local economic performance in britain after briefly discussing the shortcomings of britain s vet system the paper examines the way in which the education and training system and the local economy interact in particular it is argued that the outputs from the local education and training system determine and are determined by the locality s stock of high skill workers these high skill workers in turn help to determine the competitiveness and hence the economic performance of the local economy this has feedback effects on the stock of high skill workers through its effect on the occupational mix of in migrants some empirical tests of the model are provided based on data relating to 107 local education authority areas in england bradley s et taylor j 1996 la formation du capi

weak disposability in nonparametric production analysis reply to fare and grosskopf fare and grosskopf this issue claim that a single abatement factor suffices for modeling weak disposability in nonparametric production models and that the kuosmanen 2005 technology that uses multiple abatement factors is larger than necessary this article demonstrates by a numerical example that a single abatement factor does not suffice to capture all feasible production plans and that its use leads to the violation of convexity one of the maintained assumptions of the model we also prove that the kuosmanen technology is the correct minimum extrapolation technology under the stated axioms

models of stock returns a comparison in this paper a discrete mixture of normal distributions is proposed to explain the observed significant kurtosis fat tails and significant positive skewness in the distribution of daily rates of returns for a sample of common stocks and indexes stationarity tests on the parameter estimates of this discrete mixture of normal distributions model revealed significant differences in the mean estimates that can explain the observed skewness and significant differences in the variance estimates that can explain the observed kurtosis an alternative explanation for the observed fat tails is the symmetric student model the result of a comparison between the models is that the discrete mixture of normal distributions model has substantially more descriptive validity than the student model for many years both financial economists and statisticians have been concerned with the description of stock market returns the form of the distribution of stock returns is a crucial assumption for mean variance portfolio theory theoretical models of capital asset prices and the prices of contingent claims for example understanding the behavior of the variance is essential to option pricing models empirical tests of asset pricing models and the efficient markets hypothesis draw statistical inferences that are also conditional on distributional assumptions the most convenient assumption for financial theory and empirical methods is that the distribution of security rates of return be multivariate normal with parameters that are stationary over time since the normal distribution is stable under addition any arbitrary portfolio of stocks will also be normally distributed with the additional assumption of risk aversion mean variance theory follows furthermore the assumptions of normality and parameter stationarity are required for most of the econometric techniques typically used in empirical research tests of the normality hypothesis on the daily returns of the dow jones industrial stocks by fama 121 revealed more kurtosis fatter tails than that predicted from a sample of independent and identically distributed normal variates fama concluded from this evidence that the distribution of price changes conforms better to the stable paretian distribution with characteristic exponent

investigating the cost performance of uk credit unions using radial and non radial efficiency measures abstract this paper examines the relative efficiency of uk credit unions radial and non radial measures of input cost efficiency plus associated scale efficiency measures are computed for a selection of input output specifications both measures highlighted that uk credit unions have considerable scope for efficiency gains it was mooted that the documented high levels of inefficiency may be indicative of the fact that credit unions based on clearly defined and non overlapping common bonds are not in competition with each other for market share credit unions were also highlighted as suffering from a considerable degree of scale inefficiency with the majority of scale inefficient credit unions subject to decreasing returns to scale the latter aspect highlights that the uk government s goal of larger credit unions must be accompanied by greater regulatory freedom if inefficiency is to be avoided one of the advantages of computing non radial measures is that an insight into potential over or under expenditure on specific inputs can be obtained through a comparison of the non radial measure of efficiency with the associated radial measure two interesting findings emerged the first that uk credit unions over spend on dividend payments and the second that they under spend on labour costs

estimation of returns to scale using data envelopment analysis a comment banker 1984 introduced the idea that the sum of the intensity variables in the dea activity analysis model can be used to identify returns to scale a counterexample in chang and guh 1991 shows that banker s method may fail this prompted banker and thrall 1992 to develop an alternative approach to estimate scale efficiency using dea seemingly unaware of the work by byrnes fare and grosskopf 1984 fare grosskopf and lovell 1985 1994 and fare and grosskopf 1985 etc on the same topic their new approach is very similar to the methodology originated in these references the purpose of this comment is to make our method known and to contrast it to the banker and thrall 1992 approach

one sided elasticities and technical efficiency in multi output production a theoretical framework one of the concepts that have sparked considerable interest in the theory of production and efficiency is that of returns to scale rts economics researchers typically define rts using the notion of elasticity considerable research activity on rts has also been observed by management science researchers who utilize the methodology of data envelopment analysis dea to gain insights on rts in this paper we present a theoretical framework that integrates existing economics and management science literature on rts and provides a solid foundation for research work in this area our framework defines discusses and proposes an approach to measure input and output oriented elasticities and one sided rts we demonstrate how the work done in dea is a special case of our framework and discuss the conditions under which the resulting two left hand and the two right hand elasticities can be equal future research directions are also discussed

some models for estimating technical and scale inefficiencies in data envelopment analysis in management contexts mathematical programming is usually used to evaluate a collection of possible alternative courses of action en route to selecting one which is best in this capacity mathematical programming serves as a planning aid to management data envelopment analysis reverses this role and employs mathematical programming to obtain ex post facto evaluations of the relative efficiency of management accomplishments however they may have been planned or executed mathematical programming is thereby extended for use as a tool for control and evaluation of past accomplishments as well as a tool to aid in planning future activities the ccr ratio form introduced by charnes cooper and rhodes as part of their data envelopment analysis approach comprehends both technical and scale inefficiencies via the optimal value of the ratio form as obtained directly from the data without requiring a priori specification of weights and or explicit delineation of assumed functional forms of relations between inputs and outputs a separation into technical and scale efficiencies is accomplished by the methods developed in this paper without altering the latter conditions for use of dea directly on observational data technical inefficiencies are identified with failures to achieve best possible output levels and or usage of excessive amounts of inputs methods for identifying and correcting the magnitudes of these inefficiencies as supplied in prior work are illustrated in the present paper a new separate variable is introduced which makes it possible to determine whether operations were conducted in regions of increasing constant or decreasing returns to scale in multiple input and multiple output situations the results are discussed and related not only to classical single output economics but also to more modern versions of economics which are identified with contestable market theories

the structure of technical efficiency it is common practice to decompose measures of efficiency into component measures of technical and allocative efficiency in this paper we show how and why to decompose a general measure of technical efficiency into component measures of purely technical efficiency congestion and scale efficiency and we investigate the properties of each measure we do so for a multiple output technology which satisfies a weak axiom system that does not include either constant returns to scale or strong input disposability

decomposing technical efficiency and scale elasticity in two stage network dea abstract the constant returns to scale assumption maintained by neoclassical theorists for justifying the black box structure of production technology in long run does not necessarily allow one to infer that there are no scale benefits available in its sub technologies most of real life production technologies are multi stage in nature and the sources of increasing returns lie in the sub technologies it is therefore imperative to estimate the scale economies of a firm not only for the network technology but also for the sub technologies to accomplish this two approaches are suggested in this contribution based on the premise concerning whether a network technology construct considers allocative inefficiency the first approach which is ours makes use of a single network technology for two interdependent sub technologies the second approach which is due to kao and hwang 2011 however assumes complete allocative efficiency by considering two independent sub technology frontiers one for each sub technology the distinction between these two approaches is important from a policy point of view since the network efficiencies revealed from these two approaches have distinctive causative factors that do not permit them to be used interchangeably

choice at sixteen the proportion of sixteen year olds in britain who stay on at school is low by oecd standards this paper examines the probability of completing education at the minimum legal age using micro data on individuals parameter estimates of a reduced form logit model of the leaving probability are obtained for both boys and girls the rich data set used allows the separate effects of family school and ability to be assessed family background in the form of class and parental education is shown to have a large effect even when ability and school type are controlled for copyright 1989 by the london school of economics and political science

a data analytic look at skewness and elongation in common stock return distributions this article explores the nature of skewness and elongation in daily common stock return distributions of individual firms using estimates of g for skewness and h for elongation obtained from tukey s g and h distributions both parametric and nonparametric bootstrap estimates of standard errors of the g estimates are computed and compared daily return distributions are first examined cross sectionally over a large sample of firms the estimates of the skewness parameter exhibit variation across individual firms but some general trends are evident across industry groups and firm sizes return distributions typically seem to be more elongated than the gaussian distribution from a time series perspective both skewness and elongation are persistent in the return distributions of individual firms and vary over a finite range first order autocorrelation coefficients of monthly g and h estimates are large and suggest a certain degree of predictability

marginal values and returns to scale for nonparametric production frontiers we present a unifying linear programming approach to the calculation of various directional derivatives for a very large class of production frontiers of data envelopment analysis dea special cases of this include different marginal rates the scale elasticity and a spectrum of partial and mixed elasticity measures our development applies to any polyhedral production technology including to name a few the conventional variable and constant returns to scale dea technologies their extensions with weight restrictions technologies with weakly disposable undesirable outputs and network dea models furthermore our development provides a general method for characterization of returns to scale rts in any polyhedral technology the new approach effectively removes the need to develop bespoke models for the rts characterization and calculation of marginal rates and elasticity measures for each particular technology

returns to scale and scale elasticity in data envelopment analysis abstract the purpose of this paper is to provide mathematical characterizations of the data envelopment analysis dea based scale elasticity that is computable for both frontier and nonfrontier units in order to accomplish this we first review existing frontier results extend them formally to the nonfrontier case and then analyze how the scale elasticity behaves we also study how shadow pricing can be done as an application of the scale elasticity and show how upper and lower scale elasticity bounds can be obtained finally we provide an illustrative example for the clarification and verification of our results

consistent weight restrictions in data envelopment analysis abstract it has recently been shown that the incorporation of weight restrictions in models of data envelopment analysis dea may induce free or unlimited production of output vectors in the underlying production technology which is expressly disallowed by standard production assumptions this effect may either result in an infeasible multiplier model with weight restrictions or remain undetected by normal efficiency computations the latter is potentially troubling because even if the efficiency scores appear unproblematic they may still be assessed in an erroneous model of production technology two approaches to testing the existence of free and unlimited production have recently been developed computational and analytical while the latter is more straightforward than the former its application is limited only to unlinked weight restrictions in this paper we develop several new analytical conditions for a larger class of unlinked and linked weight restrictions

property rights in a fishery regulatory change and firm performance a new method is introduced and applied to the british columbia halibut fishery to analyze changes in productivity of firms harvesting a natural capital stock the index number technique decomposes the contributions of output prices variable input prices fixed inputs and productivity to firm profits adjusted for changes in the natural capital stock an application of the method is given using micro level data from a common pool resource the indexes provide a ready made comparison of all firms to the most profitable firm per unit of resource stock benchmarking with the decompositions also allows firms and regulators to improve overall industry performance by allowing them to analyze what components are contributing most to relative economic profits

on measuring skewness and elongation in common stock return distributions the case of the market index this article is an exploratory investigation of the distributional properties of market index returns using j w tukey s g and h distributions specifically it is shown that over sufficiently long periods of time the distribution of the market index is adequately explained as a skewed elongated g x h distribution estimates of skewness and elongation are developed that are easy to calculate and are robust with respect to outliers functional forms for the appropr iate distributions are provided the findings reported here have implications for understanding skewness and elongation developing appropriate portfolio strategies and devising pricing models incorporating higher moments copyright 1988 by the university of chicago

the failure of training in britain analysis and prescription in the last decade education and training et reform has become a major issue in many of the world s industrial powers one theme which runs throughout these reform initiatives is the need to adapt et systems to the changing economic environment these changes include the increasing integration of world markets the shift in mass manufacturing towards newly developed nations and the rapid development of new technologies most notably information technologies education and training are seen to play a crucial role in restoring or maintaining international competitiveness both on the macro level by easing the transition of the workforce into new industries and at the micro level where firms producing high quality specialized goods and services require a well qualified workforce capable of rapid adjustment in the work process and continual product innovation this paper will highlight the need for policy makers and academics to take account of the two way nature of the relationship between et and the economy

hard and soft networks for urban competitiveness the concept of competitiveness has grown significantly and it is now common for cities regions and nations to assess improve and publicise their competitive standing vis a vis other places yet it remains rather unclear just what competitiveness is when applied to places which have objectives distinct from those of private sector organisations for whom share price and profitability serve as common metrics the blurring of the responsibilities of the public and private sectors also complicates matters with the former making increasing use of the terminology and priorities of business this paper takes the view that both public and private sectors and their interactions are sustained by networks to be effective these networks must operate at the global national regional and local scales gathering knowledge via social interaction that is through soft networks to a growing degree competitive networking also demands technological capability whether in high tech sectors smokestack industries

estimating most productive scale size using data envelopment analysis abstract the relation between the most productive scale size mpss for paparticular input and output mixes and returns to scale for multiple inputs multiple outputs situations is explicitly developed this relation is then employed to extend the applications of data envelopment analysis dea introduced by charnes cooper and rhodes ccr to the estimation of most productive scale sizes for convex production possibility sets it is then shown that in addition to productive inefficiencies at the actual scale size the ccr efficiency measure also reflects any inefficiencies due to divergence from the most productive scale size two illustrations of the practical applications of these results to the estimation of most productive scale sizes and returns to scale for hospitals and stem electric generation plants are also provided emphasize the advantage of this method in examining specific segments of the efficient production surface

data envelopment analysis on a relaxed set of assumptions data envelopment analysis is a procedure for evaluation of the relative efficiency of units in a production system dea involves construction of composite units as convex combinations of other units inputs and outputs under various conditions related to returns to scale the assumption of convexity is inconsistent with increasing returns to scale and not implied by constant or non increasing returns to scale an alternative dea approach which does not invoke the assumption of a convex production possibility set is developed in this paper it is implemented in two stages stage one is concerned with the spanning of isoquants and stage two with an evaluation of the position of an observed input output combination compared to the isoquants both stages involve linear programming techniques solely

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

the impossibility of convex constant returns to scale production technologies with exogenously fixed factors abstract the extensions to the variable vrs and the constant crs returns to scale models developed by banker and morey are considered among the main approaches to the incorporation of exogenously fixed factors in models of data envelopment analysis dea recently syrjanen showed that the banker and morey crs technology is not convex taking into account that its subset vrs technology is explicitly assumed convex this observation leads to difficulties with explaining the fundamental production assumptions of the crs extension motivated by the example of syrjanen the contribution of this paper is twofold first we show that the nonconvex banker and morey crs technology is nevertheless a suitable reference technology for the assessment of scale efficiency second we ask if a convex technology could be constructed that would correct the nonconvexity of the crs technology of banker and morey the answer to this is negative one consequence of assuming both convexity and ray unboundness with fixed exogenous factors is that we can always mix and match discretionary and nondiscretionary factors taken from different units arriving at totally unrealistic production plans this demonstrates that generally there exists no meaningful convex crs technology with exogenously fixed factors that can be used in its own right apart from its use as a reference technology in the measurement of scale efficiency

human capital graduate migration and innovation in british regions with the aid of a geographical information system our paper constructs a three stage least squares simultaneous equation model to investigate the interrelationships between the interregional flows of human capital and the innovation dynamism of a region in order to do this we model the interregional migration behaviour of high quality british university graduates from university into first employment and we relate these human capital flows to both the labour market characteristics and the knowledge characteristics of the employment regions this is done for all industries and separately for just high technology industries our results indicate that for england and wales there is a two way causality between the interregional human capital employment migration flows of recent university graduates and the innovation performance of regions however the results for great britain as a whole depend on whether london is included and scotland is excluded we find little or no support for the argument that the presence of local universities or small firms promotes regional innovation

analyzing components of productivity growth using the bennet lowe indicator an application to welsh sheep farms this article introduces the bennet lowe total factor productivity tfp indicator the proposed measure is difference based additively complete and transitive we also develop a general nonparametric framework to exhaustively decompose all bennet type tfp indicators including the one introduced here into technical change technical efficiency change scale efficiency change and mix efficiency change this decomposition provides a powerful tool for policy makers to guide financial decisions on research and development extension subsidies and price support the empirical application focuses on the welsh sheep sector for the years 2001 2014 the results show that in this 14 year period welsh sheep farms increased their tfp by 30 28 on average 2 33 p a however the exhaustive decomposition shows that tfp growth is not distributed equally across all farms with an increasing divergence between front runners and laggards the negative values of scale efficiency change and mix efficiency change cast doubt on the current subsidy policies

cost effectiveness measures on convex and nonconvex technologies abstract camanho and dyson 2005 extended shephard s 1974 revenue indirect cost efficiency approach to a cost effectiveness framework which helps to assess the ability of a firm to achieve the current revenue expressed in the firm s own prices and quantities at minimum cost the degree of cost effectiveness is quantified as the ratio of the minimum cost to the observed cost of the evaluated firm where the minimum cost is computed by simultaneously adjusting the output levels at the current revenue in this paper we develop two cost effectiveness approaches based on convex data envelopment analysis and nonconvex free disposable hull technologies the objectives of this paper are threefold firstly we develop a convex cost effectiveness cce measure which is equivalent to the camanho dyson cce measure under the constant returns to scale assumption secondly we introduce three nonconvex cost effectiveness ncce measures which are shown to be equivalent with respect to each returns to scale nonconvex technology finally we apply our framework to a real data

combining the assumptions of variable and constant returns to scale in the efficiency evaluation of secondary schools our paper reports on the use of data envelopment analysis dea for the assessment of performance of secondary schools in malaysia during the implementation of the policy of teaching and learning mathematics and science subjects in the english language ppsmi the novelty of our application is that it makes use of the hybrid returns to scale hrs dea model this combines the assumption of constant returns to scale with respect to quantity inputs and outputs teaching provision and students and variable returns to scale vrs with respect to quality factors attainment levels on entry and exit and socio economic status of student families we argue that the hrs model is a better informed model than the conventional vrs model in the described application because the hrs technology is larger than the vrs technology the new model provides a tangibly better discrimination on efficiency than could be obtained by the vrs model to assess the productivity change of secondary schools over the years surrounding the introduction of the ppsmi policy we adapt the malmquist productivity index and its decomposition to the case of hrs model

extracting probabilistic information from the prices of interest rate options tests of distributional assumptions return distributions in general and interest rates in particular have been observed to exhibit skewness and kurtosis that cannot be explained by the log normal distribution using g and h distribution we derived a closed form option pricing formula for pricing european options we measured its performance using interest rate cap data and compared it with the option prices based on the lognormal burr 3 weibull and gb2 distributions we observed that the g and h distribution exhibited a high degree of accuracy in pricing options much better than those other distributions in extracting probabilistic information from the option market

economies of diversification in the banking industry abstract this paper defines a new measure economies of diversification to examine the cost effect of product line expansion this measure is a special case of expansion path subadditivity and contains economies of scope as a special case a nonparametric frontier technique which isolates the effects of inefficiency and scale is used to measure economies of diversification applied to a set of 468 u s depository institutions operating in 1984 we find slight diseconomies of diversification diseconomies of diversification and inefficiency due to the overutilization of resources are found to be more important determinants of bank costs than is the failure to operate at optimal scale

optimal weights in dea models with weight restrictions abstract according to a conventional interpretation of a multiplier dea model its optimal weights show the decision making unit under the assessment denoted dmu o in the best light in comparison to all observed dmus for multiplier models with additional weight restrictions such an interpretation is known to be generally incorrect specifically if weight restrictions are linked or nonhomogeneous and the meaning of optimal weights in such models has remained unclear in this paper we prove that for any weight restrictions the optimal weights of the multiplier model show dmu o in the best light in comparison to the entire technology expanded by the weight restrictions this result is consistent with the fact that the dual envelopment dea model benchmarks dmu o against all dmus in the technology and not only against the observed dmus our development overcomes previous concerns about the use of weight restrictions of certain types in dea models and provides their rigorous and meaningful interpretation

a scale elasticity measure for directional distance function and its dual theory and dea estimation abstract in this paper we focus on scale elasticity measure based on directional distance function for multi output multi input technologies explore its fundamental properties and show its equivalence with the input oriented and output oriented scale elasticity measures we also establish duality relationship between the scale elasticity measure based on the directional distance function with scale elasticity measure based on the profit function finally we discuss the estimation issues of the scale elasticity based on the directional distance function via the dea estimator

returns to scale in convex production technologies the notion of returns to scale rts is well established in data envelopment analysis dea in the variable returns to scale production technology the rts characterization is closely related to other scale characteristics such as the scale elasticity most productive scale size mpss and global rts types indicative of the direction to mpss in recent years a number of alternative production technologies have been developed in the dea literature most of these technologies are polyhedral and hence are closed and convex sets examples include technologies with weakly disposable undesirable outputs models with weight restrictions and production trade offs technologies that include several component production processes and network dea models for most of these technologies the relationship between rts and other scale characteristics has remained unexplored the theoretical results obtained in this paper establish such relationships for a very large class of closed convex technologies of which polyhedral technologies are an important example

multi output efficiency with good and bad outputs abstract cherchye de rock dierynck roodhooft and sabbe 2013 introduced a dea methodology that is specially tailored for multi output efficiency measurement the methodology accounts for jointly used inputs and incorporates information on how inputs are allocated to outputs in this paper we present extensions that render the methodology useful to deal with undesirable or bad outputs in addition to desirable or good outputs interestingly these extensions deal in a natural way with several limitations of existing dea approaches to treat undesirable outputs we also demonstrate the practical usefulness of our methodological extensions through an application to us electric utilities

an evaluation of yts the youth training scheme yts is much the most significant public policy intervention in the uk training market since the 1964 industrial training act ita this paper presents an economic evaluation of yts we begin in part ii by outlining the history and mechanics of the scheme part iii describes the market failure or failures which yts addresses and part iv assesses how successful it has been in tackling these problems finally part v considers the scheme s future what further changes are needed to improve its effectiveness

a general distribution for describing security price returns this paper introduces a generalized distribution called the gb2 distribution for describing security returns the distribution is extremely flexible containing a large number of well known distributions such as the lognormal log t and log cauchy distribu tions as special or limiting cases and allowing large even infinite higher moments this flexibility allows a direct representation of different degrees of fat tails in the distribution the properties of the gb2 make it useful in empirical estimation of security returns and in facilitating the development of option pricing models and other models that depend on the specification and mathematical manipulation of distributions copyright 1987 by the university of chicago

the relation of farm size and government programme benefits an application of data envelopment analysis to policy evaluation data envelopment analysis is used to establish comparisions of maximum profit without and with participation in government progarammes a measure of a farm s ability to survive returns on equity is used to measure the benefit received from participation in government programmes density functions are estimated with kernel density estimation using bootstrap samples and weighted regressions are used to test density estimation using bootstrap samples and weighted regressions are used to test the equality of mean benefits between different size groups the results indicate that almost all farms that could be considered of commercial size receive the same benefit from participation in government programmes

on the regional labour market determinants of female university enrolment in europe casarico a profeta p and pronzato c d on the regional labour market determinants of female university enrolment in europe regional studies this paper empirically investigates how young women s decisions of investing in post secondary education are affected by labour market outcomes of older women living in the same region eu silc data on educational decisions of women who completed secondary schooling are used and indicators of the regional labour market are constructed exploiting regional and time variability it is found that the share of working women with young children of women with managerial positions and the self employed positively affect the probability to enrol significant effects of these variables for men are not found

small is not that beautiful after all measuring the scale efficiency of tunisian high schools using a dea bootstrap method allocation of resources to schools in a centrally managed state system as the tunisian one should depend on the performance of the individual institutions the optimal size is of crucial importance in this context and we need accurate measurement for sound policies this article discusses and implements a nonparametric statistical test procedure for organization scale efficiency this procedure allows us to test whether the observed scale efficiency is optimal or not using a smooth bootstrap methodology for efficiency measures estimated using data envelopment analysis dea methods because school principals do not control for the size of their institution i e the capital available at decision time the scale efficiency measures are defined so as to include quasi fixed inputs the results show that scale efficiency measures are subject to sampling variation we also found that the schools that are scale efficient are usually mid sized and large schools when size is measured by the number of students

mixed partial elasticities in constant returns to scale production technologies abstract recently podinovski and forsund 2010 developed a linear programming approach to the analysis and calculation of a class of mixed partial elasticity measures in variable returns to scale vrs production technologies in the current paper we extend their approach to the constant returns to scale crs technologies and formulate linear programs required for the computation of elasticity measures among other results obtained in this paper we prove a new result valid in both vrs and crs technologies that allows us to identify the reason why the corresponding elasticity measure is undefined at the unit this removes the need for a preliminary sorting of the units into those units where the elasticity measure applies and those where it does not

dea models for resource reallocation and production input output estimation abstract this paper discusses the inverse data envelopment analysis dea problem with preference cone constraints an inverse dea model can be used for a decision making unit dmu to estimate its input output levels when some or all of its input output entities are revised given its current dea efficiency level the extension of introducing additional preference cones to the previously developed inverse dea model allows the decision makers to incorporate their preferences or important policies over inputs outputs into the production analysis and resource allocation process we provide the properties of the inverse dea problem through a discussion of its related multi objective and weighted sum single objective programming problems numerical examples are presented to illustrate the application procedure of our extended inverse dea model in particular we demonstrate how to apply the model to the case of a local home electrical appliance group company for its resource reallocation decisions

weak disposability in nonparametric production analysis with undesirable outputs environmental economics and natural resources group at wageningen university in the netherlands weak disposability of outputs means that firms can abate harmful emissions by decreasing the activity level modeling weak disposability in nonparametric production analysis has caused some confusion this article identifies a dilemma in these approaches conventional formulations implicitly and unintentionally assume all firms apply uniform abatement factors however it is usually cost effective to abate emissions in those firms where the marginal abatement costs are lowest this article presents a simple formulation of weak disposability that allows for non uniform abatement factors and preserves the linear structure of the model

from school to university the demand for post compulsory education in britain the work reported here was done at the centre for labour economics lse and it is a revision of earlier work done at the national bureau of economic research this revision owes much to the comments and suggestions of richard layard and to the technical expertise of george alogoskoufis thanks are also due to the department of education and science for their comments and help with the data and to the manpower services commission the department of employment and the ford foundation for finance

a simple derivation of scale elasticity in data envelopment analysis in this paper we suggest a simple derivation of the formulae for the scale elasticity in the variable returns to scale technology as used in data envelopment analysis our development is consistent with the existing literature but the proof is much shorter and applies to the general case without any simplifying conditions

policy scepticism and the impact of scottish higher education institutions heis on their host region accounting for regional budget constraints under devolution hermannsson k lisenkova k mcgregor p g and swales j k policy scepticism and the impact of scottish higher education institutions heis on their host region accounting for regional budget constraints under devolution regional studies a policy scepticism has emerged that challenges the results of conventional regional higher education institution hei impact analyses this paper provides a systematic critique of such scepticism while rejecting its extreme form the limiting effect of the binding public sector expenditure constraints under devolution is noted and it is shown how conventional impact analyses can be augmented to accommodate these constraints while the results suggest that conventional impact studies overestimate the expenditure impacts of heis they also demonstrate that the policy scepticism that treats these expenditure effects as irrelevant neglects some key aspects of heis in particular their export intensity