do r d tax credits work evidence from a panel of countries 1979 1997 this paper examines the impact of fiscal incentives on the level of r d investment an econometric model of r d investment is estimated using a new panel of data on tax changes and r d spending in nine oecd countries over a 19 year period 1979 1997 we find evidence that tax incentives are effective in increasing r d intensity this is true even after allowing for permanent country specific characteristics world macro shocks and other policy influences we estimate that a 10 fall in the cost of r d stimulates just over a 1 rise in the level of r d in the short run and just under a 10 rise in r d in the long run

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

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

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

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

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

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

empirical measures of inflation uncertainty a cautionary note a direct ex ante measure of inflation uncertainty in the us is compared with a number of proxies used in empirical studies the direct estimate is the root mean subjective variance of the probability distributions for inflation reported by respondents to the asa nber survey the proxies include forecast standard deviations from arima arch and structural models of inflation these proxies are not significantly correlated with the direct measure nor with one another use of the proxies leads to incorrect inferences about the correlation between inflation and inflation uncertainty and between inflation uncertainty and the real interest rate

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

how effective are fiscal incentives for r d a review of the evidence this paper surveys the econometric evidence on the effectiveness of fiscal incentives for r d we describe the effects of tax systems in oecd countries on the user cost of r d the current position changes over time and across different firms in different countries we describe and criticize the methodologies used to evaluate the effect of the tax system on

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

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

policy incentives r d investment and the energy intensity of china s manufacturing sector abstract the chinese strategic plan made in china 2025 aims at improving the independent innovation capacity of the manufacturing industry it also commits to constructing green manufacturing systems through cleaner production and green technologies the chinese government provides research and development r d preferential policies to promote the realization of these aims using the two stage least square 2sls method this paper tests the impact of r d capital and its spillover on the energy intensity of the chinese manufacturing industry it also evaluates the effectiveness of r d policy in promoting r d investment at the industry level the findings show that r d capital is positively linked to the reduction of energy intensity and heterogeneity exists in the relationship between energy intensity and r d capital across industries this study finds that in general r d subsidies and tax relief do not significantly promote r d investment but r d subsidies generate a significantly positive effect on the r d intensity in the high tech industries

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

toward obtaining a consistent estimate of the elasticity of taxable income using difference in differences abstract the elasticity of taxable income eti is a central parameter for tax policy debates this paper shows that mean reversion prevents most estimators employed in the literature from obtaining consistent estimates of the eti a new method is proposed that will resolve inconsistency due to mean reversion under testable assumptions regarding the degree of serial correlation in the error term using this procedure i estimate an eti of 0 858 which is about twice as large as the estimates found in the most frequently cited paper on this subject 13 the corresponding elasticity of broad income is 0 475

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

cross country evidence on the link between inflation volatility and growth it is generally accepted that short run monetary mis management as reflected in inflation volatility affects the long run growth rate of the economy this proposition is tested for a cross section sample of 78 countries over the period 1965 85 the evidence suggests that after controlling for other country specific growth correlates high inflation volatility is associated with lower mean growth inflation volatility was also found to have a negative effect on the productivity of investment but does not appear to affect the share of investment of gdp these results are also robust to an alternative data set that extends the sample period to 1994

the effects of inflation on economic growth lessons from latin america this paper investigates the relationship between inflation and long run growth it presents an endogenous growth model that illustrates the channels through which inflation affects growth the model highlights the effects of inflation on the productivity of capital and the rate of capital accumulation the reduction in growth is caused by a diversion of resources away from activities that lead to faster rates of growth toward activities associated with reducing the costs of inflation the negative association between inflation and growth is assessed empirically for a sample group of latin american countries this abstract was borrowed from another version of this item

long run growth and volatility which source really matters the aim of the article is to analyse the relationship between long run growth and business cycle volatility in particular the main purpose of this article is to identify which source of volatility is most detrimental to growth using cross country data from 1970 to 2000 and several indicators of volatility such as inflation exchange rate government expenditure output and investment volatility this article shows that although all these measures of volatility are remarkably harmful for growth business cycle investment volatility is the main source that hampers long run growth this relation is robust to different measures of business cycle and to different sub samples of countries

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

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

macroeconomic determinants of domestic private investment in africa an empirical analysis during the late 1970s and early 1980s many african countries experienced a profound slowdown in economic growth the growth rate of real per capita gdp fell from 0 4 per year during the 1973 80 period to 1 2 per year during the 1980 89 period the causes internal and external of africa s economic decline and the strategies for restoring economic growth are much debated nevertheless broad consensus has emerged on the importance of i increasing total investment and ii promoting private sector development and increasing its share of total investment for long term growth 2 it is widely recognized that gross domestic investment fell substantially in africa during the 1980s and remains severely depressed across the region the proportion of total domestic investment in gdp fell from 20 8 per year during 1973 80 to 16 1 per year during 1980 89 in some countries investment has fallen to less than 10 of gdp a level that is insufficient even to replace depreciated capital in africa the minimum investment needed to replace depreciated capital is estimated at 13 of gdp 3 in recent years there has also been a growing recognition among many african leaders faced with new realism and pragmatism that the private sector could play a significant role in economic development the focus in the longer term of structural adjustment programs and sectoral reforms adopted by these countries is on creating more appropriate incentives and a framework for private sector development as the basis for achieving sustainable economic growth in addition multilateral and bilateral institutions have developed new initiatives with priorities for private sector development in 1989 the international finance corporation an affiliate of the world bank es

long run impacts of inflation across sectors in a small sample of countries this article investigates the long run effects of inflation on economic output for 10 sectors of the economy with a sample of 7 countries the analysis is done using long run restrictions in a vector autoregression and reports long run multipliers with bootstrapped confidence bands the results suggest that some sectors seem to be affected differently than others as well as significant heterogeneity across countries the results suggest the strongest effects in the low inflation countries germany and japan as has been found in similar studies in contrast to research using growth regressions the evidence suggests a positive long run effect of inflation on output

the effect of income taxes on household income research on the distribution of income during the 1980s has identified a trend towards increasing inequality which may be the continuation and acceleration of trends spanning several decades this paper explores to what extent behavioral responses to the tax changes during the 1980s may also explain the rising inequality the 1986 tax reform act is used as a natural experiment to explore the roles played by both taxes and a variety of nontax factors our principal finding is that both tax rates and nontax factors appear to have had significant effects on relative income growth during the late 1980s

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

macroeconomic stability investment and growth in developing countries abstract it is widely hypothesised that sound macroeconomic policies promote growth by providing a more secure environment for private sector investment decisions this proposition is tested for a cross section of developing countries over the period 1980 1990 using a variety of measures of the quality of macroeconomic management the evidence suggests that good macroeconomic management is associated with faster growth for a given rate of investment it is less clear that the volume of investment is significantly affected there is little evidence of non linearities the results are robust to an extension of the data period back to 1972

do tax credits stimulate r d spending the effect of the r d tax credit in its first decade abstract this paper examines the impact of the u s federal r d tax credit between 1981 1991 using confidential irs data from corporate tax returns the empirical analysis makes two key advances on previous work first it implements a new instrumental variables iv strategy based on tax changes that directly addresses the simultaneity of r d spending and marginal credit rates second the analysis makes use of new restricted access irs corporate return data describing r d expenditures estimates imply that a10 reduction in the user cost of r d leads the average firm to increase its research intensity the ratio of r d spending to sales by 19 8 in the short run long run estimates imply that the average firm faces adjustment costs and increases spending over time though small and young firms show evidence of reversing initial increases analysis of the components of qualified research shows that wages and supplies account for the bulk of the increase in research spending elasticities of qualified and total research intensities from a smaller sample suggest firms respond to user cost changes largely by increasing their qualified spending meaning that the type of r d the federal credit deems qualified research is an important margin on which the credit affects firm behavior

debt crisis adjustment policies and capital formation in developing countries where do we stand abstract this paper documents the decline in investment rates observed in developing countries after 1982 and explores analytically and empirically the factors contributing to explain it the paper focuses on the impact of macroeconomic adjustment and reform measures on private investment particularly in latin america and east asia and underscores the importance of macroeconomic uncertainty policy credibility and potential coordination failures in shaping the response of investment to the changes in economic incentives brought about by structural reforms the analysis concludes with some policy recommendations to improve the design of sustainable growth oriented adjustment programs

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

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

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

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

r d tax incentives in eu countries does the impact vary with firm size this paper studies the effect of r d tax incentives on the research activity of manufacturing firms based in france italy spain and the uk over the period 2007 2009 using a matching procedure we show that in all the examined countries but spain r d tax incentives induced a statistically significant increase in the intensity of r d expenses over sales however this effect is driven only by the behaviour of small firms by assessing the benefit cost ratio of r d tax policies we find evidence of substantial additional effects in italy and the uk

beggar thy neighbor the in state out of state and aggregate effects of r d tax credits abstract the proliferation of r d tax incentives among u s states in recent decades raises two questions i are these tax incentives effective in increasing in state r d ii how much of any increase is due to r d being drawn away from other states this paper answers i yes and ii nearly all the paper estimates an augmented r d factor demand model using state panel data from 1981 to 2004 i estimate that the long run elasticity of in state r d with respect to the in state user cost is about 2 5 while its elasticity with respect to out of state user costs is about 2 5 suggesting a zero sum game among states

the elasticity of taxable income evidence and implications abstract a central tax policy parameter that has recently received much attention but about which there is substantial uncertainty is the overall elasticity of taxable income we provide new estimates of this elasticity which address identification problems with previous work by exploiting a long panel of tax returns to study a series of tax reforms throughout the 1980s this identification strategy also allows us to provide new evidence on both the income effects of tax changes on taxable income and on variation in the elasticity of taxable income by income group we find that the overall elasticity of taxable income is approximately 0 4 the elasticity of real income not including tax preferences is much lower we estimate small income effects of tax changes on reported income implying that the compensated and uncompensated elasticities of taxable income are very similar we estimate that this overall elasticity is primarily due to a very elastic response of taxable income for taxpayers who have incomes above 100 000 per year who have an elasticity of 0 57 while for those with incomes below 100 000 per year the elasticity is less than one third as large moreover high income taxpayers who itemize are particularly responsive to taxation our estimates suggest that optimal tax structures may feature tightly targeted transfers to lower income taxpayers and a flat or even declining marginal rate structure for middle and high income taxpayers

interest rates r d investment and the distortionary effects of r d incentives abstract this paper conducts the first analysis of how interest rates are related to firms allocation of investment between r d and non r d activities and how r d incentives alter this relationship it theoretically predicts that if firms receive incentives mostly in the form of grants and subsidies that reduce their dependence on external finance their share of r d spending increases decreases during a credit tightening easing conversely if tax credits are the primary incentive firms decrease increase their share of r d spending during a credit tightening easing the paper demonstrates empirical support for these predictions by using firm level financial and sector level r d incentives data and a unique methodology that focuses on the within firm allocation of investment

explicit and implicit tax effects of the r d tax credit this paper investigates the effects of the 1981 research and development r d tax credit first by examining the impact of the credit on the level of r d investment and second by estimating the magnitude of the implicit tax created by the credit the two effects are interrelated because an increase in the level of r d investment will increase the demand for r d inputs thus reducing the pretax rate of return from r d activity 1 i test the credit s investment effect using a time series r d spending model that includes both factors from the industrial organization literature to control for nontax effects and an r d credit usability variable to capture the incentive created by the credit previous research has produced mixed evidence on whether the credit had any positive

the anatomy of industry r d intensity distributions using firm data disaggregated by industry we establish a set of regularities in the distribution of firm r d intensities within manufacturing industries we show how a simple probabilistic process in which chance influences a key unobserved determinant of r d and firm size conditions the returns to r d can account for these regularities and other features of the distributions the model provides a unified noncausal explanation of a series of long observed relationships across mean r d intensity market concentration and the coefficient of variation it also offers a novel explanation for the inverse relationship between r d productivity and firm size jel 031