explaining agricultural productivity growth an international perspective this article presents multi output multi input total factor productivity tfp growth rates in agriculture for 88 countries over the 1970 2001 period estimated with both stochastic frontier analysis sfa and the more commonly employed data envelopment analysis dea we find results with sfa to be more plausible than with dea and use them to analyze trends across countries and the determinants of tfp growth in developing countries the central finding is that policy and institutional variables including public agricultural expenditure and proagricultural price policy reforms are significant correlates of tfp growth the most significant geographic correlate of tfp growth is distance to the nearest oecd country

environmental efficiency evaluation of industry in china based on a new fixed sum undesirable output data envelopment analysis national natural science funds of china for innovative research groups 70821001 national natural science funds of china 70901069 71222106 71203186 research fund for the doctoral program of higher education of china 20133402110028 fundamental research funds for the central universities wk 2040150007 china scholarship council

infrastructure and aggregate agricultural productivity international evidence a relationship has long been recognized between a country s agricultural development and its investment in infrastructure capital such as transportation and communication facilities that is not directly related to the agricultural production process the relevant literature spans adam smith s proposition that the division of labour is limited by the extent of the market the work of von thtinen numerous studies by historians and economic historians and the work of economists such as schultz kuznets wharton owens and johnston and kilby to mention a few despite the apparently widespread recognition and acceptance that a relationship exists between agricultural development and infrastructural development few if any empirical studies test this as a hypothesis and provide estimates of the magnitude of such a relationship 2 the aim of this paper is to utilize 1965 aggregate agricultural production data and the concept of the aggregate production function to study the effects of transportation and communication infrastructure on aggregate agricultural productivity the aggregate data come from 47 less developed countries ldcs and 19 developed countries dcs the sample countries are listed in the appendix the use of intercountry comparisons for development studies dates to clark and the pioneering work of kuznets and it has been exploited econometrically by chenery 3 an important contribution to the study of international agricultural productivity was made by hayami and ruttan who showed that an aggregate agricultural production function that accounts for intercountry differences in resource endowments technical modern inputs and human capital can explain a large proportion of the variation in aggregate agricultural output across more and less developed agricultures 4 evenson and kislev modified hayami and ruttan s model by including a variable measuring each country s investment in agricultural research 5 essentially the same

revisiting the role of education for agricultural productivity while the majority of micro studies finds that rural education increases agricultural productivity various recent cross country regressions analysing the determinants of agricultural productivity were only able to detect insignificant or even surprising negative effects of schooling in this paper we argue and show that this failure to find a positive impact of education in the international context is rather a data problem related to the use of enrolment and literacy indicators using a panel of 95 developing and middle income countries from 1961 to 2002 together with the newest version of the barro lee educational attainment dataset we show that education indeed has a highly significant positive effect on agricultural productivity which is robust to changes in the control variables and in the econometric methods applied distinguishing between different levels of education further reveals that only primary and secondary schooling have significant positive impacts while tertiary education remains insignificant finally the effect of education is estimated separately for countries with different income levels results indicate that the coefficient of the education variable remains insignificant for countries from the poorest three income quintiles while it is positive and highly significant for the richest two quintiles this finding can be interpreted as support for the prominent argument claiming that education leads to higher agricultural productivity only in the presence of rapid technical change where education will help farmers to adjust more readily to the new opportunities

agricultural performance and development strategy retrospect and prospect abstract the slow pace and inequitable pattern of past agricultural growth have been major factors in the continuing problems of poverty hunger and unemployment especially in the poorer regions of the third world past experience shows that agriculture has an important potential in economic development given appropriate structures and policies these historical lessons are of strategic significance for poor countries as they confront severe problems of adjustment this paper examines the main payoffs and obstacles to the pursuit of an agriculture led industrialization strategy together with proposals for appropriate policies that can support such a strategy

assessing regional environmental efficiency in china with distinguishing weak and strong disposability of undesirable outputs abstract china has developed a remarkable economic growth in the past 30 years by accompanying with undesirable outputs the assumptions of weak and strong of undesirable outputs have become the focus discussion in data envelopment analysis dea models to have a comprehensive environmental efficiency measurement this paper proposes three dea models considering weak disposability strong disposability and distinguishing weak and strong disposability of undesirable outputs respectively we further combine with the malmquist luenberger productivity index to assess the environmental efficiency and the dynamic change trend of 30 provinces in china from 2005 to 2014 the results show that distinguishing technical features of undesirable outputs makes a significant difference to final environmental efficiency score at different regions the environmental efficiency of the whole nation however does not show any increasing trend during the ten years enhancing environmental efficiency of central and west area is an urgent task for chinese government the change trend of malmquist luenberger productivity index and technological change shows a similar shape technical progress is the main driving force to enhance the environmental efficiency relevant suggestions are presented for improving the regional environmental efficiency in china in the future

statistical analysis and combination forecasting of environmental efficiency and its influential factors since china entered the wto 2002 2010 2012 abstract since china became a member of world trade organization wto its economy develops at a fast speed at the same time the environmental problem becomes more and more serious and increasingly affects economic development studying the factors that influence environmental efficiency has become an essential point in dealing with the relationship between economy and environment considering the differences in space and economic development among different districts this paper discusses the quantitative relationship among exports figure imports figure gdp per capita industrialization level fiscal decentralization and environmental efficiency of each chinese province by using statistical analysis furthermore this paper discusses differences among each district s influential factors from the perspective of spatial economics and makes combination forecast on the trend of environmental efficiency it also shows that the environmental efficiency of chinese provinces is generally at a low level in addition as the economic statuses of different provinces vary and the factors that influence environmental efficiency in different provinces also have significant differences each province should take certain measures to design the environmental protection policy in line with its local circumstance

nutrients impacts and determinants understanding the determinants of nutrient intake and the influence of nutrition on performance is critical in designing policies to alleviate hunger and malnutrition a series of studies undertaken by the authors which are synthesized here analyzes the influence of prices income and women s schooling on the nutrient intake of those in developing countries and the effect of nutrition on health productivity wages and fertility these studies suggest that the impact of food price increases may be strong particularly among those with the lowest incomes that the growth of income may be less likely to improve nutrient intake than has been suggested by others and that womzen s schooling is important in improving nutrition these studies also indicate that nutrition exerts a positive influence on wages productivity and fertility our limited knowledge of the role and determinants of nutrition is reflected in the finding of unduly strong effects of seasonalitv on price nutrition relations and the lack of a direct association between nutrition and health the nutrition of poor populations is of substantial interest because of the widespread and plausible presumption that better nutrition improves the welfare of individuals in such populations nutrition also is of interest because of the common conjecture that better nutrition improves productivity a series of our studies have analyzed the relations between nutrition and health labor productivity and fertility and the relations between prices income women s schooling and nutrition intake here we synthesize the results of these studies and address some of the puzzles and policy implications that have arisen

marketed surpluses of agricultural households in sierra leone an agricultural household model is used with household level data from sierra leone to estimate elasticities of marketed surplus for several outputs and for labor with respect to price and nonprice variables positive own price elasticities are found with magnitudes considerably above own price output elasticities changes in household characteristics and production technology also affect marketed surpluses but not always in anticipated directions elasticities are reported for households when grouped by their total expenditure not just for the sample mean the differences are important showing that low expenditure households respond as much as high expenditure households

nutrition and labor producvivity in agriculture estimates for rural south india using panel data for rural south india a fixed effects individual wage equation and farm production function are estimated that have calorie intake and nutritional status weight for height of workers as their arguments neither market wages nor farm output are observed to be responsive to changes in the daily energy intake of workers however both are highly elastic with respect to weight for height these results suggest that while the human body can adapt to inadequate nutrition in the short run it cannot adapt as readily to chronic malnutrition that eventually results in loss of weight for height copyright 1988 by mit press

ranking intervals and dominance relations for ratio based efficiency analysis we develop comparative results for ratio based efficiency analysis rea based on the decision making units dmus relative efficiencies over sets of feasible weights that characterize preferences for input and output variables specifically we determine i ranking intervals which indicate the best and worst efficiency rankings that a dmu can attain relative to other dmus ii dominance relations which show what other dmus a given dmu dominates in pairwise efficiency comparisons and iii efficiency bounds which show how much more efficient a given dmu can be relative to some other dmu or a subset of other dmus unlike conventional efficiency scores these results are insensitive to outlier dmus they also show how the dmus efficiency ratios relate to each other for all feasible weights rather than for those weights only for which the data envelopment analysis dea efficiency score of some dmu is maximized we illustrate the usefulness of these results by revisiting reported dea studies and by describing a recent case study on the efficiency comparison of university departments this paper was accepted by teck hua ho decision analysis

what shapes player performance in soccer empirical findings from a panel analysis in this article we investigate the pay performance relationship of soccer players using individual data from eight seasons of the german soccer league bundesliga we find a nonlinear pay performance relationship indicating that salary does indeed affect individual performance the results further show that player performance is affected not only by absolute income level but also by relative income position an additional analysis of the performance impact of team effects provides evidence of a direct impact of team mate attributes on individual player performance

the state s role in financing agricultural research abstract recent declines in public agricultural research funding in developing countries may not be as severe or as universal as widely perceived although some research systems are clearly constrained an analysis of the economic characteristics of agricultural research suggests that there may be some crowding out of private finance but the harnessing of additional private resources depends critically on enhancing the profitability and appropriability of research benefits while the case for increasing levels of public funding on research with greater public good characteristics remains strong however the justifiable scrutiny of the state s role in financing agricultural research should not be at the expense of continued efforts to improve the efficiency of agricultural research delivery and the management of existing funds

capital accumulation and the growth of aggregate agricultural production abstract this report empirically examines the role which capital accumulation plays in the growth of agricultural production potential the report assumes that the degree towhich available technology can be implemented in a nation s agricultural sector depends on accumulated investments that have been made in the sector results from estimating aggregate agricultural production functions show the primary importance of rural labor in accounting for agricultural gdp and crop production capital accumulation is the dominant explainer of livestock production estimation results support the conjecture that capital tends to save scarce land resources substitute relationship and use rural labor complementarity relationship output supply elasticities derived from the estimated equations tend to be large the large elasticities imply that price distortions have had large impacts on resource use and production

regional environmental efficiency in china an empirical analysis based on entropy weight method and non parametric models abstract while vigorously developing its economy china is attaching more and more importance to environmental protection and pollution control in different regions of china however there are great differences in economic development and the degree of environmental pollution in this study we use the entropy weight method to calculate the pollution indexes of different regions from 2015 to 2017 then we evaluate the chinese regional environmental efficiency based on a new non parametric frontier model moreover a new set of ranking interval models that treat the undesirable outputs as inputs is proposed to further describe the regional disparities of the environmental efficiency between different regions with robustness finally we conduct an empirical analysis by combining the stepwise regression and principal component analysis to identify the most influential variables that may affect regional environmental efficiency according to the results the southeast region of china performs best in environmental efficiency followed by the northeast region then the southwest region and the worst is the northwest region for managerial implications we find that the investment of high education and the development of the it industry can significantly increase regional environmental efficiency more importantly the results of the principal component analysis provide the government with a set of variables to strategically select the most appropriate strategy

institutions and agricultural productivity in sub saharan africa agricultural productivity in 41 sub saharan africa ssa countries from 1960 to 1999 is examined by estimating a semi nonparametric fourier production frontier over the four decades the estimated rate of productivity change was 0 83 per year although the average rate from 1985 99 was a strong 1 90 per year former uk colonies exhibited significantly higher productivity gains than others while liberia and countries that had been colonies of portugal or belgium exhibited net reductions in productivity we measure a significant reduction in productivity during political conflicts and wars and a significant increase in productivity among those countries with higher levels of political rights and civil liberties

investments in african agricultural research abstract over the past three decades africa s public agricultural research systems have changed in substantive ways the total number of researchers increased fourfold the dependency on expatriate researchers significantly declined while the education levels of national researchers improved initially the growth in research staff was matched by growth in expenditures but since the late 1970s real research spending has stagnated in addition loans and grants from donor agencies now account for a sizeable share of total funding for many african agricultural research systems many of the developments of the past decade in personnel expenditures and sources of support for public sector research and development r d in africa are not sustainable spending per scientist has declined continuously during the past 30 years most dramatically during the 1980s resources are spread increasingly thin over a growing group of researchers which has negative effects on the efficiency and effectiveness of agricultural research in africa

determinants of productivity change using a profit function smallholder agriculture in zimbabwe the concept of total factor productivity tfp the ratio of quality adjusted output to input is straightforward yet explaining pro ductivity change and attributing residual out put growth to its appropriate sources raises numerous problems it has long been argued that technical change policy reform and insti tutional innovation are complements and are all required to achieve sustained productivity growth johnson lipton evenson and kramer binswanger and pingali however in explain ing productivity growth the emphasis usually is put on weather and on investments that gen erate new technology which farmers must be educated to use usually public sector research and development expenditures extension farmer education while these are un doubtedly important the conventional approach see for a survey has often ne glected the role of policies and investments at other stages of the agricultural system affecting farm technology adoption 1the danger of the conventional approach is that it may not adequately measure policy ef fects on productivity through their influence on input and output prices the conventional ap proach may therefore provide misleading impli cations for promoting productivity growth weak infrastructure and institution can prevent

export instability imports and investment in developing countries prominent among the arguments comprising the pessimistic orthodoxy on the impact of export instability on the domestic economies of developing countries is the view that such instability adversely affects the capacity to import and in turn investment beginning from a conventional harrod domar framework this article develops a time series model which is then applied to data for a sample of developing countries the results suggest that export instability does affect both capital goods imports and to a lesser extent domestic investment there is little evidence of offsetting movements in international reserves

a multidimensional approach to measuring bank branch efficiency abstract bank branch efficiency measurements range from simple ratio and standard regression analyses to more complex frontier approaches each with specific strengths and weaknesses however in isolation the indexes that these approaches generate fail to capture the multidimensional nature of bank branch efficiency this paper develops a three step procedure that enables combining the strengths of the existing approaches we begin by taking the widest number of efficiency indexes proposed in literature step 1 reduce the redundant information through a collinearity analysis step 2 and categorize bank branches into efficiency classes through a clustering procedure step 3 we test our approach on 23 branches of an italian regional bank the results show that this three step approach is able to provide a multidimensional view of efficiency based on indexes employing a wide range of theoretical and methodological approaches with different ways of conceiving intermediation vs production and measuring stock vs flow or physical measures bank outputs and inputs different definitions of efficiency technical and cost efficiency and different measurement approaches ratios standard regression analysis and frontier functions the resulting efficiency ranking is consistent with those that univariate indexes generate and provides a balanced evaluation of branch efficiency when such indexes produce contradictory indications

the intercountry agricultural production function another view factor productivity in agriculture is estimated from repeated observations on a sample of fifty eight countries under the assumption that all countries have access to the same technology technology is viewed as a collection of techniques each technique is represented by a production function the choice of the implemented techniques is determined by the state variables which represent the physical and economic environment within which the firms operate the statistical model is that of varying coefficients and it is estimated by a method which utilizes principal components and multiple comparisons

non parametric productivity analysis with undesirable outputs an application to the canadian pulp and paper industry this article extends the chavas cox approach to non parametric analysis by incorporating undesirable outputs to provide a more complete representation of the production technology inner and outer non parametric technology bounds are constructed the methods are illustrated with application to time series data for the canadian pulp and paper industry conventional measures that ignore changes in pollutant outputs underestimate true productivity growth further there is a large gap between estimates generated with reference to inner and outer bounds to the technology suggesting that researchers need to be aware of the limitations of results derived from analyses relying only on dea methods copyright 2001 oxford university press

investments in schooling in two generations in pre revolutionary nicaragua the roles of family background and school supply abstract family background and school supply underlie the demand and supply for schooling but are usually ignored in empirical estimates these considerations are investigated for two generations in nicaragua using unique data on adult sisters and their offspring to identify inter versus intrafamilial effects and to control for unobserved family background the results suggest that the standard interpretations are misleading 1 unobserved family background and school supply factors are important in schooling determination 2 omission of these factors leads to overestimates of impacts of parental schooling and family size 3 both parental schooling and family size primarily represent unobserved family background and school supply in standard estimates

modeling undesirable factors in efficiency evaluation abstract data envelopment analysis dea measures the relative efficiency of decision making units dmus with multiple performance factors which are grouped into outputs and inputs once the efficient frontier is determined inefficient dmus can improve their performance to reach the efficient frontier by either increasing their current output levels or decreasing their current input levels however both desirable good and undesirable bad factors may be present for example if inefficiency exists in production processes where final products are manufactured with a production of wastes and pollutants the outputs of wastes and pollutants are undesirable and should be reduced to improve the performance using the classification invariance property we show that the standard dea model can be used to improve the performance via increasing the desirable outputs and decreasing the undesirable outputs the method can also be applied to situations when some inputs need to be increased to improve the performance the linearity and convexity of dea are preserved through our proposal

export instability and economic growth in sub saharan africa empirical research on the relationship between export instability and economic growth in less developed countries ldcs has yielded mixed results while some researchers find a negative relationship between export instability and economic growth others find a positive relationship a third group of researchers finds no significant relationship between export instability and economic growth in ldcs 1 those who find a negative relationship between export instability and economic growth in ldcs stress the negative effect export instability has on the supply of output through the generation of uncertainty in long term planning as well as due to shortages of inputs at critical times during the production process those who find a positive relationship between export instability and economic growth argue that ldcs respond to export instability by reducing consumption this process if repeated over a period of time increases savings and hence the rate of investment those who find no significant relationship between export instability and economic growth argue that ldcs are able to anticipate the fluctuations in export earnings and plan for such fluctuations hence instability in export earnings has no appreciable effect on economic growth c moran investigates the relationships between domestic savings rate and economic growth rate on the one hand and export instability on the other in a sample of ldcs 2 he finds that export instability has no significant long run impact on either domestic savings rate or economic growth rate however over relatively short periods of time export instability has a negative and significant effect on both savings and economic growth rate the negative effect occurs when the negative effects of price and of quantity fluctuations reinforce each other on the other hand when the negative effect of price fluctuations is counterbalanced by the effects of quantity fluctuations export instabil

multilateral productivity comparisons when some outputs are undesirable a nonparametric approach multilateral productivity comparisons of firms producing multiple outputs some of which are undesirable are obtained by making two modifications to the standard farrell approach to efficiency measurement the restriction that production technology satisfy strong disposability of outputs is relaxed to allow for the fact that undesirable outputs may be freely disposable and the efficiency measures are modified to allow for an asymmetric treatment of desirable and undesirable outputs performance measures that satisfy these requirements are calculated as solutions to programming problems the methodology is applied to a sample of mills producing paper and pollutants

productivity growth and the effects of r d in african agriculture this article measures and compares total factor productivity growth in african agriculture under contemporaneous and sequential technology frontiers over the period 1970 2004 the sources of productivity growth are examined using a fixed effects regression model and a polynomial distributed lag structure for agricultural r d expenditures while conventional estimates show an average productivity growth rate of only 0 3 per year the improved measures under sequential technology show that african agricultural productivity grew at a higher rate of 1 8 per year technical progress rather than efficiency change was the principal source of productivity growth agricultural r d weather and trade reforms turned out to have significant effects on productivity in african agriculture with a rate of return of 33 per year r d is shown to be a socially profitable investment in african agriculture while a strong r d expenditure growth of about 2 per year in the 1970s led to strong productivity growth after the mid 1980s stagnation of r d expenditure in the 1980s and early 1990s led to slower productivity growth in the 2000s consistent with recent economic recovery in africa evidenced by stronger agricultural gdp growth rates results showed that policy reforms as well as improved weather contributed to the recovery of agricultural productivity after the mid 1980s

does more schooling make women better nourished and healthier adult sibling random and fixed effects estimates for nicaragua there is debate on whether schooling causes increases in productivity or whether the estimated relationships reflect ability knowledge tastes etc that are associated with schooling this paper examines the impact of women s schooling on women s health and nutrition with and without controls for unobserved childhood background factors related to ability and motivation random and fixed effects models are estimated using data on adult sisters both sets of estimates reinforce the relationships found in standard estimates that women s schooling positively affects their health and nutrient intakes the latter result is particularly robust

returns to food and agricultural r d investments in sub saharan africa 1975 2014 research enabled growth in agricultural productivity is pivotal to sub saharan africa s overall economic growth prospects yet investments in research and development rd median 38 0 py around 78 5 of the evaluations relate to the commodity specific consequences of agricultural research while 5 5 report on the returns to an all agriculture aggregate the weight of commodity specific evaluation evidence is not especially congruent with the composition of agricultural production throughout africa nor to the best that can be determined the commodity orientation of public african agricultural r d

building african scientific capacity for agricultural development abstract during africa s first two decades of independence from 1960 to 1980 priority was given to increasing the size of national extension services because it was assumed that technology could be imported from industrial countries and the international agricultural research centers over the past decade donors have turned their attention to assisting national agricultural research systems nars but many nars are performing poorly and are faced with a high turnover of scientific staff and inadequate operating budgets moreover the present donor financed project by project and country by country approach to building african scientific capacity is seriously flawed this paper examines africa s agricultural research history over the past six decades and draws lessons for strengthening national and regional agricultural research systems over the coming 30 years

china s regional sustainability and diversified resource allocation dea environmental assessment on economic development and air pollution abstract environmental protection including the prevention of air pollution and health hazard materials such as pm2 5 and pm10 is now a very serious policy issue in china after attaining the rapid economic growth and development the pm stands for particular matter indicating the size of both solid particles and liquid droplets found in air unfortunately the economic development has produced a serious healthcare problem in not only china and other surrounding nations to enhance people s healthcare and appeal a good national image to the world china is recently looking for the new industrial and environmental policy direction to attain social sustainability in terms of economic development and environmental prevention to discuss policy implications on the new policy direction this study utilizes data envelopment analysis dea for assessment on its regional performance by incorporating pm2 5 and pm10 as undesirable outputs along with two disposability concepts i e natural disposability and managerial disposability no previous dea study has incorporated the amount of pm2 5 and pm10 in empirical investigation using a simulated data set for the period of 2013 2014 this study measures the efficiency of municipality cities under four different types of regional classifications the empirical results indicate that the chinese government should distribute its economic resources to cities which locate in the northwest region including lanzhou xining yinchuan and urumqi and reinforce more strict regulation on energy consumptions for environmental prevention in major cities e g beijing tianjin shanghai and chongqing the industrial policy change from the economic growth to the environment protection is essential for the future of china which is currently the second largest economic power in the world the environmental protection can enhance the china s image of contributing in economics industry and environmental protection to all other nations it can be envisioned that the new policy effort reduces the regional imbalance and increases the social sustainability in china the empirical findings and policy implications discussed in this study are applicable to not only china but also other industrial and developing nations and those are useful in guiding their industrial and environmental policy development

will developing country nutrition improve with income a case study for rural south india aggregate estimates of food expenditure are consistent with such a possibility implying income expenditure elasticities close to one however the high degree of aggregation at which such estimates are made means that the considerable increase in price per nutrient as income increases is ignored and the nutrient elasticities are therefore overstated estimates for a rural south indian sample indicate that this bias is considerable and that the true nutrient elasticities with respect to income may be close to zero

does european regional competitiveness influence sports an analysis of three sports the main objective of this work was to test european regional determinants of sports competitiveness we studied competitiveness in volleyball basketball and handball we developed a theoretical model based on the model proposed by bernard and busse 2004 to analyse the effect of regional institutions and sport environments that can interfere with sports competitiveness to test our model we constructed an enlarged database for all european nuts2 since 1995 which we analysed using panel data techniques censored tobit models our results reveal that the regions that are able to maintain player performance do so by persistent effort and external influences these factors contribute more to regional competitiveness than a region s central location or political prominence

determinants of food consumption in rural sierra leone abstract this paper reports the application of a quadratic expenditure system with demographic variables to the household consumption leisure choice component of a household firm model a system of seven commodities is estimated including five foods non food and leisure appropriate for such a level of disaggregation a demand system is used the quadratic expenditure system which allows for a flexible relationship between full income and commodity expenditures without sacrificing parsimony in parameters demographic data on households are explicitly incorporated into the model allowing for a richer specification than can be achieved by using per capita variables the data are from a cross section survey of households in rural sierra leone price variation exists by region permitting estimation of a complete demand system engel curves are found to be significantly non linear with marginal expenditure on rice the major staple declining with higher income most foods are found to be reasonably price responsive with sizeable own price substitution effects declining with higher income aggregate labor supply is found to be price inelastic

the meta production function approach to technological change in world agriculture abstract an alternative meta production function for agriculture is estimated with the cross section data for 43 countries and three years 1960 1970 and 1980 constructed and used by kawagoe hayami and ruttan and hayami and ruttan in their studies by allowing for country specific efficiency factors and using a flexible functional form the transcendental logarithmic production function strikingly different results from those of kawagoe hayami and ruttan are obtained in particular it is found that elasticity of output with respect to machinery is variable and the degree of local returns to scale is not constant and increases with the usage of machinery

adoption of modern varieties farmers welfare and crop biodiversity evidence from uganda abstract this paper assesses the impact of modern varieties adoption on farmers welfare and crop biodiversity conserved in situ using nationally representative data collected in 2009 2010 in uganda an endogenous switching regression model estimates the net economic and environmental effects of switching from local landraces to modern species results show that after controlling for market and agro ecological factors the local varieties perform better than modern ones in marginalized and climatic vulnerable areas crop biodiversity shows to play a fundamental role in farmers risk minimizing strategies when the available modern varieties are not adaptable to the local context and not supported by the required level of agro intensification rural development policies should consider the heterogeneity in the adoption returns and support diversity conservation as a national strategic asset for a suitable bioprospecting and a best fitting agricultural system implementation

the place of agricultural research in the development of sub saharan africa abstract outside sub saharan africa ssa agricultural research ar yields excellent returns why does ssa get so little from its major ar effort why do its ar scientists cost more yet produce less smallness of countries and research stations dispersion and high turnover make it hard to attain a critical mass of national ar scientists to remedy this they could concentrate on a few problems and crops yet they have neglected many of the most important e g cassava and overstressed export crops in other ways too european biases have distorted african ar socioeconomists moreover have entered research design too little and too late above all current domestic funds have been too scanty and unreliable to adequately support international and capital account ar efforts this lack of steady commitment illustrates ar s need for direction from clearer agricultural policy based on radically improved information and recognizing ssa s dramatic rise in labor land ratios guidelines for such policy are indicated within these a formalized and poverty oriented ar design system is suggested

some alternative models for dea cross efficiency evaluation abstract cross efficiency evaluation is an effective method for ranking decision making units dmus in data envelopment analysis dea and can be performed with different formulations aggressive or benevolent secondary goals and models this paper proposes some new alternative models for dea cross efficiency evaluation to provide more methodological options for the decision maker dm to choose from the proposed new alternative models are illustrated with two numerical examples the results are believed to be more realistic than those obtained by the alternative secondary goals suggested by liang et al liang l wu j cook w d and zhu j 2008a alternative secondary goals in dea cross efficiency evaluation international journal of production economics 113 2 1025 1030

performance evaluation of the english premier football league with data envelopment analysis this paper uses data envelopment analysis dea to evaluate the performance of english premier league football clubs from 1998 99 to 2002 03 combining sport and financial variables the paper evaluates how close the clubs are relative to the frontier of best practices analysing how they manage sport as well as financial results managerial implications of the research are devised

regional energy efficiency evaluation in china a super efficiency slack based measure model with undesirable outputs abstract with the rapid development of global economy the demand for energy has increased significantly therefore energy efficiency improvement is essential for global energy and economic transformation in the chinese context study on the energy efficiency of various provinces can contribute to better understand china s energy utilization status and provide policy implications for improving china s energy utilization efficiency in this study based on the super efficiency slack based measure model with undesirable outputs the energy efficiency of china s 30 provinces in 2013 and 2014 was investigated then the energy efficiency of the eastern central and western china was compared and further discussed finally according to the results the relevant policy implications were put forward the results showed that china s overall energy efficiency had decreased while taking the undesirable outputs into consideration in addition eastern china had the highest energy efficiency and the energy efficiency of western china was relatively low the energy efficiency gap among china s provinces was still large therefore it was necessary to improve china s overall energy efficiency by developing targeted policies considering regional conditions

sources of agricultural productivity growth and stagnation in sub saharan africa this paper examines sources of agricultural growth in sub saharan africa growth in the stock of traditional inputs land labor livestock remains the dominant source of output growth growth in modern input use was of secondary importance but still accounted for a 0 2 0 4 annual growth rate in three of four sub regions econometric results support earlier studies that suggest that land abundance may be a constraint on land productivity growth growth in agricultural exports and historic calorie availability had positive impacts on productivity these latter results suggest that positive feedback effects exist between export performance and food security on one hand and agricultural productivity on the other

land distribution and international agricultural productivity the unequal distribution of agricultural land is often cited as a source of inefficiency in agriculture previous cross country studies of agricultural productivity differences though have not considered land inequality this article addresses this issue by using cross country data on inequality in operational holdings of agricultural land from deininger and squire 1998 in an estimation of an agricultural production function the gini coefficient for land holdings is found to have a significant negative relationship with productivity this is consistent with the existence of heterogeneity in productivity by farm size within countries a one standard deviation drop in the gini coefficient implies an increase in productivity of 8 5

financial constraints on sport organizations cost efficiency the impact of financial fair play on italian soccer clubs we analyze the effect of the introduction of stricter financial constraints on the trade off between sporting and economic results we apply a stochastic cobb douglas production frontier model to a

creating rural livelihoods some lessons for south africa from experience elsewhere abstract a development path for south africa that will create jobs and reduce poverty must include the encouragement of greater labor intensity in agriculture especially of smallholder farming which was suppressed under apartheid there is however widespread skepticism on both the left and the right about the prospects for more labor intensive farming but this skepticism is called into question by both theory and evidence of the advantages of small scale production in certain products and circumstances there are now numerous examples of this in many parts of the world the paper discusses the preconditions for the development of such farming in south africa including land reform and the need to reorient investment and supporting economic and technical services research training marketing credit from the privileged large scale white farms to the undercapitalized and neglected black smallholders

the impact of agricultural research on productivity and poverty in sub saharan africa while it is widely recognized that agricultural research is a key driver of broad based technological change in agriculture that benefits the poor in many different ways little is known about its aggregate impacts on productivity growth and poverty reduction in sub saharan africa ssa using a polynomial distributed lag structure for agricultural research within a simultaneous system of equations framework this paper first demonstrates that agricultural research contributes significantly to productivity growth in ssa productivity growth is again shown to raise per capita incomes with income increases finally having significant poverty reducing effects with an aggregate rate of return of 55 the payoffs to agricultural research are also impressive agricultural research currently reduces the number of poor by 2 3 million or 0 8 annually while the actual impacts are not large enough to more than offset the poverty increasing effects of population growth and environmental degradation the potential impacts of agricultural research are far greater apart from low research investments ssa faces several constraints outside the research system that hinder realization of potential research benefits the results show that doubling research investments in ssa would reduce poverty by 9 annually however this would not be realized without more efficient extension credit and input supply systems

commodity price stabilisation macroeconomic impacts and policy options a macroeconometric simulation study is undertaken to evaluate the impact of commodity price stabilisation cps schemes for the export tree crop industry in papua new guinea the findings suggest that there is a negligible level of favourable macroeconomic impacts of cps contrary to the expectation cps adversely affects the stability of monetary and external sectors bop cps policy has failed to stabilise the macroeconomy the price stabilisation policies are no longer appropriate from the macroeconomic point of view technical change futures market and rural savings are the possible alternative policy options to manage the price risk

environmental efficiency analysis of china s regional industry a data envelopment analysis dea based approach abstract china s economic has got remarkable achievements during the past 30 years which has brought tremendous pressure on natural resources and serious environmental pollution at the same time in this paper we aim to make environmental efficiency analysis of china s regional industry data envelopment analysis dea method is incorporated and the slacks based measure sbm model considering undesirable outputs is introduced to measure the environmental efficiency of different regions big data theory is introduced in the collection and selection of the input and output data of the regions further we evaluate the environmental efficiencies of china s industry using data from 2008 to 2012 the results show that apart from several developed provinces the environmental efficiencies of china s industry are generally low and the environmental efficiencies of the regions did not show any increasing trend through the past 5 years additionally lager differences exist in environmental efficiencies between the regions in china finally we suggest the chinese government to focus on the low environmental efficiencies and the unbalanced development of its regional industry

the quality of schooling quantity alone is misleading although much research discusses the quantity of schooling as an effective impact on productivity and earnings most such research leaves out the idea of the quality of schooling which may cause biases in the estimated returns to schooling this paper consequently attempts to extend the standard mincerian approach to incorporate school quality as well as quantity it demonstrates how exclusion of quality in the standard procedure may cause biases in the estimated returns to years of schooling probably in the upward direction the paper explores the implications of this extension of the standard model for the case of young brazilian males it shows that the estimate of the private return to years of schooling using the preferred quality inclusive specification is only one half the estimate using the standard procedure indicating substantial upward bias in the standard estimates it further outlines a method for estimating a social return to quality and finds that it exceeds substantially the social return to quantity the paper then shows why this in turn suggests there may be an equity productivity trade off in schooling investments

exploring the widening food gap an international perspective using data for a long panel of 90 developed and developing countries this article explores the effects of research and development r d and fixed capital stock on agricultural land productivity over the period 1961 2012 instruments are used for r d to deal with feedback effects and measurement errors the results show very high social returns to investment in r d and to fixed capital stock suggesting that increasing investment in these factors are promising ways of arresting the increasing food prices due to increasing demand for animal protein population growth desertification salinization soil erosion climate change and decreasing growth in land productivity

soccer transfers team efficiency and the sports cycle in the most valued european soccer leagues have european soccer teams been efficient in trading players abstractthe sale of soccer players is a serious issue for the sustainability of professional teams this article discusses the efficiency of the values that 183 european soccer teams have received for the sales of their players since 2007 we estimated stochastic frontiers for these soccer teams using stochastic frontier analysis we found that teams with higher numbers of titles with huge past acquisitions of players and achieving good rankings in the previous season tend to receive more transfer inflows the efficiency of these inflows can be significantly influenced if the team exhibits a long sports history or if the team participates in the champions league or in the europa league

world product and income international comparisons of real gross product the volume reports on the third phase of the united nations international comparison project icp the main results provide comparisons of real gross domestic product gdp per capita for thirty four countries in 1975 quantity and price comparisons are given also for personal consumption capital formation and public consumption and further subdivisions of final expenditures on gdp are estimated

more evidence on nutrition demand income seems overrated and women s schooling underemphasized abstract malnutrition is widespread in the developing world controversy continues concerning the roles of income household size and women s schooling on nutrient demand empirical estimates for nicaragua suggest that income elasticities are small and inversely associated with income levels there are some economies of scale in household size the elasticity for women s schooling is higher than those for income or household size and women s backgrounds are important the results cast doubt on the strong emphasis the world bank and others have placed on income and suggest that schooling may be working through tastes not only through productivity