factor demand technical change and inter fuel substitution in africa abstract the translog production function has been widely used in applied production analysis due to its flexibility and superiority over other functional forms this study develops a translog production function for a group of african countries the random effects model is estimated using generalized least squares estimator the main findings are first output in africa is driven by a more intensive use of petroleum and electricity and to a lesser extent capital labor and coal relative to technological progress second african production technology exhibits increasing returns to scale suggesting a path towards market entry barriers third technical change is scale biased and factor augmenting albeit very slow fourth all energy inputs are substitutes indicating africa s potential to proportionally switch towards cleaner fuels without adversely affecting economic growth finally and perhaps more generally the study reinforces the assertion that imposing restrictions like homotheticity homogeneity or separability on the production technology is unrealistic and should rather be a testable hypothesis within any applied analysis in view of the documented findings relevant implications for africa are discussed

revenue maximizing dutch auctions with discrete bid levels abstract this paper is concerned with setting a predetermined number of bid levels in a dutch auction to maximize the auctioneer s expected revenue as a departure from the traditional methods used by applied economists and game theorists a novel approach is taken in this study to tackle the problem by formulating the auctioning process as a constrained nonlinear program and applying standard optimization techniques to solve it aside from proposing respective closed form formulae for computing the optimal bid levels and the auctioneer s maximum expected revenue we also show that the bid decrements should be increasing if there are two or more bidders in the dutch auction additionally the auctioneer s maximum expected revenue increases with the number of bidders as well as the number of bid levels finally managerial implications of the key findings as well as limitations of this research work are discussed

causal relationship between trade openness economic growth and energy consumption a panel data analysis of asian countries abstract this paper explores the causal relationship between economic growth trade openness and energy consumption using data of 15 asian countries the study covers the period of 1980 2011 we have applied panel cointegration and causality approaches to examine the long run and causal relationship between variables empirical results confirm the presence of cointegration between variables the impact of economic growth and trade openness on energy consumption is found to be positive the panel granger causality analysis reveals the bidirectional causality between economic growth and energy consumption trade openness and energy consumption

the relationship between energy consumption structure economic structure and energy intensity in china this paper investigates the long run equilibrium relationships temporal dynamic relationships and causal relationships between energy consumption structure economic structure and energy intensity in china time series variables over the periods from 1980 to 2006 are employed in empirical tests cointegration tests suggest that these three variables tend to move together in the long run in addition granger causality tests indicate that there is a unidirectional causality running from energy intensity to economic structure but not vice versa impulse response analysis provides reasonable evidences that one shock of the three variables will cause the periods of destabilized that followed however the impact of the energy consumption structure shock on energy intensity and the impact of the economic structure shock on energy consumption structure seem to be rather marginal the findings have significant implications from the point of view of energy conservation and economic development in order to decrease energy intensity chinese government must continue to reduce the proportion of coal in energy consumption increase the utilization efficiency of coal and promote the upgrade of economic structure furthermore a full analysis of factors that may relate to energy intensity e g energy consumption structure economic structure should be conducted before making energy policies

valuing oil properties integrating option pricing and decision analysis approaches there are two major competing procedures for evaluating risky projects where managerial flexibility plays an important role one is decision analytic based on stochastic dynamic programming and the other is option pricing theory or contingent claims analysis based on the no arbitrage theory of financial markets in this paper we show how these two approaches can be profitably integrated to evaluate oil properties we develop and analyze a model of an oil property either a developed property or a proven but undeveloped reserve where production rates and oil prices both vary stochastically over time and at any time the decision maker may terminate production or accelerate production by drilling additional wells the decision maker is assumed to be risk averse and can hedge price risks by trading oil futures contracts we also describe extensions of this model that incorporate additional uncertainties and options discuss its use in exploration decisions and in evaluating a portfolio of properties rather than a single property and briefly describe other potential applications of this integrated methodology

on electricity consumption and economic growth in china abstract the invention and application of the electric power technology triggered the second industrial revolution in human history which marked the human society entered the age of electricity electricity provides the sustainable power for economic and social development with the rapid development of economy the electricity consumption is also increasing the increase of electricity consumption has further promoted the progress of the industrial economy in order to achieve the goal of improving the level of economic development while reducing energy consumption it is necessary to reveal the relationship between electricity consumption and economic growth this study is an extensive overview of the literature surrounding this topic in this paper we focus on the relationship between electricity consumption and economic growth in china we first analyze the general situation of china s electricity consumption and economic development then we explore the relationship between china s electricity consumption and economic growth from three dimensions i e the time dimension the regional dimension and the industrial dimension finally we study the key issues in the research of the relationship between electricity consumption and economic growth including variable selection model construction and results discussion this work suggests that the nature of the nexus in china should and can be explored from a wider perspective by developing a suitable integrated methodological framework

energy consumption carbon emissions and economic growth in saudi arabia an aggregate and disaggregate analysis the objective of this study is to examine the relationship among economic growth carbon emissions and energy consumption at the aggregate and disaggregate levels for the aggregate energy consumption model we use total energy consumption per capita and co2 emissions per capita based on the total energy consumption for the disaggregate analysis we used oil gas and electricity consumption models along with their respective co2 emissions the long term income elasticities of carbon emissions in three of the four models are positive and higher than their estimated short term income elasticities these results suggest that carbon emissions increase with the increase in per capita income which supports the belief that there is a monotonically increasing relationship between per capita carbon emissions and per capita income for the aggregate model and for the oil and electricity consumption models the long and short term income elasticities of carbon emissions are negative for the gas consumption model this result indicates that if the saudi arabian economy switched from oil to gas consumption then an increase in per capita income would reduce carbon emissions the results also suggest that electricity is less polluting than other sources of energy

electricity consumption real gdp causality nexus evidence from a bootstrapped causality test for 30 oecd countries the goal of this paper is to examine any causal effects between electricity consumption and real gdp for 30 oecd countries we use a bootstrapped causality testing approach and unravel evidence in favour of electricity consumption causing real gdp in australia iceland italy the slovak republic the czech republic korea portugal and the uk the implication is that electricity conservation policies will negatively impact real gdp in these countries however for the rest of the 22 countries our findings suggest that electricity conversation policies will not affect real gdp

energy consumption real income and temporal causality results from a multi country study based on cointegration and error correction modelling techniques abstract unlike previous studies on the causal relationship between energy consumption and economic growth this paper illustrates how the finding of cointegration i e long term equilibrium relationship between these variables may be used in testing granger causality based on the most recent johansen s multivariate cointegration tests preceded by various unit root or non stationarity tests we test for cointegration between total energy consumption and real income of six asian economies india pakistan malaysia singapore indonesia and the philippines non rejection of cointegration between variables rules out granger non causality and imples at least one way of granger causality either unidirectional or bidirectionial secondly by using a dynamic vector error correction model we then analyse the direction of granger causation and hence the within sample granger exogeneity or endogeneity of each of the variables thirdly the relative strength of the causality is gauged through the dynamic variance decomposition technique by decomposing the total impact of an unanticipated shock to each of the variables beyond the sample period into proportions attributable to shocks in the other variables including its own in the bivariate system results based on these tools of methodology indicate that while all pair wise relationships shared common univariate integrational properties only relationships for three countries india pakistan and indonesia were cointegrated for these countries temporal causality results were mixed with unidirectional causality from energy to income for india exactly the reverse for indonesia and mutual causality for pakistan the vdcs were not inconsistent with these results and provided us with an additional insight as to the relatively more dominant direction of causation in pakistan simple bivariate vector autoregressive models for the three non cointegrated systems did not indicate any direction of causality significantly in either direction

reducing child malnutrition how far does income growth take us how rapidly will child malnutrition respond to income growth this article explores that question using household survey data from 12 countries as well as data on malnutrition rates in a cross section of countries since the 1970s both forms of analysis yield similar results increases in income at the household and national levels imply similar rates of reduction in malnutrition using these estimates and better than historical income growth rates the article finds that the millennium development goal of halving the prevalence of underweight children by 2015 is unlikely to be met through income growth alone what is needed to accelerate reductions in malnutrition is a balanced strategy of income growth and investment in more direct interventions

energy consumption and gdp causality relationship in g 7 countries and emerging markets abstract the causality relationship between energy consumption and income is a well studied topic in energy economics this paper studies the time series properties of energy consumption and gdp and reexamines the causality relationship between the two series in the top 10 emerging markets excluding china due to lack of data and g 7 countries we discover bi directional causality in argentina causality running from gdp to energy consumption in italy and korea and from energy consumption to gdp in turkey france germany and japan hence energy conservation may harm economic growth in the last four countries

the impact of electricity supply on economic growth in sri lanka abstract yang energy econ 22 2000 309 has found a bi directional causal relationship between gross domestic product and electricity consumption in taiwan roc this study applies yang s model to examine the impact of electricity supply on economic growth in sri lanka morimoto and hope an extended cba model of hydro projects in sri lanka 2001 have found that the expected increase in economic output due to increased electricity supply parameter eo plays a crucial role in their cost benefit analysis model this study shows that the application of yang s regression analysis is one possible approach to estimate a better range for the parameter eo the estimated figure is that an extra output of rs 88 000 137 000 us1120 1740 for every 1 mw h increase in electricity supply

energy and national income in korea further evidence on the role of omitted variables abstract results of this paper indicate that the real oil price is a major determinant of real national income and energy consumption the combined effects of real money and real government expenditure on real income and energy consumption are also substantial a lack of causality or the causality between energy and real income in prior studies is due to the omitted variables results also confirm that the two oil price shocks combined adversely affected real national income

an investigation of co integration and causality between energy consumption and economic activity in taiwan applying hsiao a version of the granger causality method this paper examines the causality between energy and gnp and energy and employment by applying recently developed techniques of co integration and hsiao s version of the granger causality to taiwanese data for the 1955 1993 period the phillips perron tests reveal that the series with the exception of gnp are not stationary and therefore differencing is performed to secure stationarity the study finds causality running from gdp to energy consumption without feedback in taiwan it is also found that causality runs from gdp to energy but not vice versa

the human development index yet another redundant composite development indicator abstract in its human development report 1990 the united nations development program undp proposes yet another composite indicator of development levels the human development index hdi the hdi assesses intercountry development levels on the basis of three so called deprivation indicators life expectancy adult literacy and the logarithm of purchasing power adjusted per capita gdp using simple statistical analysis this paper questions both the composition of the hdi and its usefulness as a new index of development it concludes that the hdi is both flawed in its composition and like a number of its predecessors fails to provide insights into intercountry development level comparisons which preexisting indicators including gnp per capita alone cannot

energy consumption prices and economic growth in three ssa countries a comparative study in this paper we examine the causal relationship between energy consumption and economic growth in three sub saharan african countries namely south africa kenya and congo drc we incorporate prices as an intermittent variable in a bivariate setting between energy consumption and economic growth thereby creating a simple trivariate framework using the ardl bounds testing procedure we find that the causality between energy consumption and economic growth varies significantly across the countries under study the results show that for south africa and kenya there is a unidirectional causal flow from energy consumption to economic growth however for congo drc it is economic growth that drives energy consumption these findings have important policy implications insofar as energy conservation policies are concerned in the case of congo drc for example the implementation of energy conservation policies may not significantly affect economic growth because the country s economy is not entirely energy dependent however for south africa and kenya there is a need for more energy supply augmentations in order to cope with the long run energy demand in the short run however the two countries should explore more efficient and cost effective sources of energy in order to address the energy dependency problem

human development concepts and measurement abstract the human development report hdr of the undp argues for a new approach to the definition measurement and achievement of development this paper traces the intellectual origins of the hdr in the recent literature on poverty entitlements and capability the paper also deals in particular with the human development index hdi and explains its rationale and its future revisions

development and use of a modeling system to aid a major oil company in allocating bidding capital bidding at u s offshore oil and gas lease sales is characterized by high stakes enormous uncertainties and many interrelated decisions the lease bidding strategy system combined techniques from decision analysis statistics and nonlinear optimization to provide information and insights to management responsible for bidding at gulf oil corporation it was used prior to every major federal lease sale from september 1980 until gulf was acquired in 1984 during which time gulf s bids exceeded 1 5 billion this paper describes the evolution and use of this system emphasizing its impact on the organization it describes efforts that gained acceptance for this system under difficult circumstances and illustrates the importance of adapting methodology to problem changes over time to our knowledge this is the first public documentation of the long term use by a major oil company of a system for constrained multiblock optimization of its bids and partnership shares at u s offshore lease sales

causality relationship between electricity consumption and gdp in bangladesh in this paper we examine the causal relationship between the per capita electricity consumption and the per capita gdp for bangladesh using cointegration and vector error correction model our results show that there is unidirectional causality from per capita gdp to per capita electricity consumption however the per capita electricity consumption does not cause per capita gdp in case of bangladesh the finding has significant implications from the point of view of energy conservation emission reduction and economic development

modeling and forecasting natural gas demand in bangladesh natural gas is the major indigenous source of energy in bangladesh and accounts for almost one half of all primary energy used in the country per capita and total energy use in bangladesh is still very small and it is important to understand how energy and natural gas demand will evolve in the future we develop a dynamic econometric model to understand the natural gas demand in bangladesh both in the national level and also for a few sub sectors our demand model shows large long run income elasticity around 1 5 for aggregate demand for natural gas forecasts into the future also show a larger demand in the future than predicted by various national and multilateral organizations even then it is possible that our forecasts could still be at the lower end of the future energy demand price response was statistically not different from zero indicating that prices are possibly too low and that there is a large suppressed demand for natural gas in the country

an analysis of chinese provincial carbon dioxide emission efficiencies based on energy consumption structure abstract china plans to reduce carbon dioxide emissions from 2005 levels by 40 45 by 2020 and by 60 65 by 2030 this research project addresses this challenge by analyzing chinese provincial carbon dioxide emission efficiencies and the energy consumption structure the study applies the slacks based measure sbm model to analyze the data from 30 regions in china from 2000 to 2011 the situation of provincial carbon dioxide emission efficiency the characteristics of the energy consumption structure in each province and the differences among these provinces are quantitatively analyzed based on the k means cluster analysis this research suggests that china be divided into five groups in the energy consumption structure the inefficient and less reasonable group the inefficient and more reasonable group the efficient and less reasonable group the efficient and more reasonable group and the efficient and most reasonable group the study offers recommendations for the government to develop policies to effectively and efficiently reduce carbon dioxide emission levels for each group it also has profound implications for government administration in developing countries to guide the energy consumption and to control environmental pollution for the healthy development of the economy

open innovation in the power energy sector bringing together government policies companies interests and academic essence the power and energy p e sector needs to respond to several challenges fostering investments in research and development according to the open innovation oi paradigm key stakeholders like utilities vendors laboratories universities etc should take advantage of external knowledge to improve their innovation performance several studies have demonstrated that firms adopting the oi paradigm are more likely to innovate despite the interest of p e firms in enhancing their innovation capabilities surprisingly few articles usually case studies described the implementation of the oi paradigm in p e firms this article fills the gap by identifying the key drivers that encourage a firm in the p e sector to embrace the oi paradigm the authors adopt a hybrid research approach collecting evidence from the literature and through a multiple case study analysis involving seven british firms and universities operating in the p e industry as the drivers of oi have mutual influence this article describes them with a fuzzy cognitive map finally the authors identify appropriated policies to enhance the oi adoption and consequently the sustainability of innovation in the p e sector a salient research agenda closes the paper

resource allocation models with risk aversion and probabilistic dependence offshore oil and gas bidding bidding for offshore u s oil and gas leases is a major corporate resource allocation problem involving enormous uncertainties and very high stakes this paper presents two new operationally useful decision analysis models to aid in bidding for oil and gas leases they are unique in that they consider risk aversion and probabilistic dependence among the values of the leases with both bid levels and partnership shares as continuous decision variables they are suitable for use in evaluating proposed bidding policies or as objective functions in optimization formulations practicality of their data requirements is evidenced by use of one of the models for several years in a major oil company comparison of optimal solutions to these models on a small example using actual oil company data demonstrates the importance of taking risk aversion and probabilistic dependence into account and provides insight into the adequacy of independence and conditional dependence as approximations for dependence these results are pertinent to other real world allocation problems that share many of the characteristics of bidding problems such as r d funds allocation

a modified human development index abstract this paper discusses a modified index for measuring human development the suggested index is based on the components of the human development index hdi developed by the united nations development programme undp since 1990 it discusses two categories of technical issues related to the hdi for 1995 those related to the components and those relevant to the structure of the index the data from the human development report 1995 for 174 countries are used to test the robustness of the suggested index and the results are compared to those of the hdi the new index is then used to delineate with some justification different groups of countries at various levels of human development

energy consumption and economic growth in the next 11 countries the bootstrapped autoregressive metric causality approach abstract departing from previous literature using bootstrapped autoregressive metric causality approach which is more robust against non stationarity and break problems than lag augmented tests this study analyzes causal relation between economic growth and energy consumption in the next 11 countries estimating a trivariate model consisting of gdp per capita energy consumption per capita and gross capital formation it was found that the neutrality hypothesis is valid for all of the countries except for turkey these findings imply that energy conservation oriented policies should be implemented in bangladesh egypt indonesia iran korea mexico pakistan and philippines in the case of turkey a unidirectional causal nexus was found from energy consumption to economic growth since the growth hypothesis is valid energy conservation policy poses an obstacle for economic growth in turkey

the electricity consumption versus economic growth of the polish economy abstract the aim of this contribution is an investigation of causal interdependences between electricity consumption and gdp in poland our research was conducted for total electricity consumption as well as for the industrial consumption of electricity in order to reflect the causality between gdp and electricity consumption properly we performed our investigations in a three dimensional framework with employment chosen as an additional variable we used reliable quarterly data from the period q1 2000 q4 2009 in order to check the stability of the causalities the investigations were performed on two samples a full sample and a pre crisis i e q1 2000 q3 2008 subsample we applied both traditional methods and some recently developed econometric tools we found feedback between total electricity consumption and gdp as well as between total electricity consumption and employment we also found unidirectional causality running from industrial electricity consumption to employment and no direct causal links between industrial electricity consumption and gdp in addition all these findings were in general not seriously affected by the financial and economic crises of 2008 a significant exception is the causal effect of industrial electricity consumption on employment which was more pronounced after the crisis of 2008

dynamic analysis on market structure of china s coal industry abstract according to industrial organization theory market structure is a crucial factor to market performance based on the var model and the data from 1994 to 2014 we revealed the dynamic response route of the market structure to these factors and the change process of contribution rate of these factors to the market structure it shows that market structure is inertial adjustment technology advance and industry policy have continuous effects on improvement of market concentration ratio market size and production scale have sustained negative effects on market concentration ratio fixed capital has barrier effect which is mainly the entry barrier effect at the beginning and then the exit barrier effect continues to play a leading role therefore the government has no need to introduce special policies to encourage merger or expansion on the capacity as enterprises would do it spontaneously it is necessary to make market access system stricter to improve exit compensation mechanism and to promote technological innovation all these policies need dynamic adjustment based on the stages of economic cycle

are energy conservation policies effective without harming economic growth in the gulf cooperation council countries abstract this study explores the fossil fuels electricity consumption growth of the gross domestic product gdp relationship in the six gulf cooperation council gcc countries for the period 1980 2012 the aim of this study is to examine whether energy conservation policies are appropriate for these countries to reduce their high levels of electricity consumption the autoregressive distributed lag ardl and the toda yamamoto dolado lutkepohl tydl methodologies were employed to investigate this relationship the ardl results revealed that fossil fuels electricity consumption has a long run positive effect on gdp growth in the gcc countries however the tydl granger causality revealed different causality relationships among the countries a bi directional causality was found between fossil fuels electricity consumption and gdp growth in bahrain and the united arab emirates uae while one way causality from fossil fuels electricity consumption to gdp growth was found in oman and qatar on the other hand no causality was concluded between the variables in kuwait and saudi arabia from the results it is clear that energy conservation is not an ideal policy for the bahrain uae oman and qatar because it will have a negative consequence on their output however this policy can be implemented in kuwait and saudi arabia since it will not harm their output

causal relationship between energy consumption and gdp revisited the case of korea 1970 1999 abstract causal relationship between energy consumption and economic growth is investigated applying a multivariate model of capital labor energy and gdp usual btu energy aggregate is substituted with a divisia aggregate in an attempt to mitigate aggregation bias to test for granger causality in the presence of cointegration among the variables we employ a vector error correction model rather than a vector autoregressive model empirical results for korea over the period 1970 1999 suggest a long run bidirectional causal relationship between energy and gdp and short run unidirectional causality running from energy to gdp the source of causation in the long run is found to be the error correction terms in both directions

the impact of urbanization on residential energy consumption in china an aggregated and disaggregated analysis abstract although the relationship among urbanization energy consumption and co2 emissions has been extensively studied in recent years little attention has been paid to the effect of urbanization on residential energy consumption china as the largest developing country still has tremendous potential for urbanization in the future and this paper thus explores the effect of urbanization on the changes of residential energy consumption during 1996 2012 for china both from aggregated and disaggregated perspectives using the divisia decomposition method the findings on aggregated energy show that the urbanization contributes 15 4 to the increase of residential energy consumption during 1996 2012 but with a diminishing trend over time meanwhile from the disaggregated perspective the urbanization process contributes to an improvement of residential energy consumption structure specifically 1 of increase in urbanization rate may result in a decrease of 420 thousand million tonnes of residential coal consumption and an increase of 301 thousand tonnes of oil consumption

regional innovation and spillover effects of foreign direct investment in china a threshold approach huang l liu x and xu l regional innovation and spillover effects of foreign direct investment in china a threshold approach regional studies using a data set on twenty nine chinese provinces for the period 1985 2008 this paper establishes a threshold model to analyse the relationship between spillover effects of foreign direct investment fdi and regional innovation in china there is clear evidence of double threshold effects of regional innovation on productivity spillovers from fdi specifically only when the level of regional innovation reaches the minimum innovation threshold will fdi in the region begin to produce positive productivity spillovers furthermore positive productivity spillovers from fdi will be substantial only when the level of regional innovation attains a higher threshold the double threshold divides chinese provinces into three super regions in terms of innovation with most provinces positioned within the middle level innovation super region policy implications are di

energy and economic growth in the usa a multivariate approach abstract this paper examines the causal relationship between gdp and energy use for the period 1947 90 in the usa the relationship between energy use and economic growth has been examined by both biophysical and neoclassical economists in particular several studies have tested for the presence of a causal relationship in the granger sense between energy use and economic growth however these tests do not allow a direct test of the relative explanatory powers of the neoclassical and biophysical models a multivariate adaptation of the test vector autoregression var does allow such a test a var of gdp energy use capital stock and employment is estimated and granger tests for causal relationships between the variables are carried out although there is no evidence that gross energy use granger causes gdp a measure of final energy use adjusted for changing fuel composition does granger cause gdp

causality cointegration and control abstract the first sections of the paper show that causality tests can be relevant when considering the effectiveness of a control mechanism rejecting some results in earlier papers the relevance comes from a more careful consideration of what information is available to whom and when compared to previous work the final section of the paper extends this analysis to cointegrated variables when causality is a necessary consequence

a note on the causal relationship between energy and gdp in taiwan abstract this paper re examines the causality between energy consumption and gdp by using updated taiwan data for the period 1954 1997 as a secondary contribution we investigate the causal relationship between gdp and the aggregate as well as several disaggregate categories of energy consumption including coal oil natural gas and electricity applying granger s technique we find bidirectional causality between total energy consumption and gdp we find further that different directions of cause exist between gdp and various kinds of energy consumption

a review of hunger indices and methods to monitor country commitment to fighting hunger several indices measuring hunger and progress in achieving hunger eradication have been proposed in the literature this paper reviews existing hunger indices and critically assesses their quality against a number of desirable properties hunger indices are found to be unsatisfactory in a number of ways they ignore distributional issues they neglect the occurrence of food and health shocks and are sometimes based on unreliable data anthropometric measurements stunting in particular emerge as powerful indicators of hunger and are ideal for addressing a number of policy relevant issues the paper also introduces a conceptual framework for an index measuring country commitment to fighting hunger the constitutive elements of this index are illustrated political will anti hunger policies and programmes suggestions are made on how a commitment index can be built and what are the data requirements

the relationship between energy and gnp further results this paper reexamines the casuality between gnp and energy consumption by using updated us data for the period 1947 1979 as a secondary contribution we investigate the causal relationship between energy consumption and employment applying sims technique we find no causal relationship between gnp and energy consumption we find further that there is a slight unidirectional flow running from employment to energy consumption economic interpretations of the empirical results are also presented

the influence of real output renewable and non renewable energy trade and financial development on carbon emissions in the top renewable energy countries due to tremendous increase in the level of carbon dioxide co2 emissions in the last several decades a number of studies in the energy growth environment literature have attempted to identify the determinants of co2 emissions a major criticism related to the existing studies we realize is the selection of panel estimation techniques almost all studies use panel methods that ignore the issue of cross sectional dependence even though countries in the panel are most likely heterogeneous and cross sectionally dependent in addition the majority of existing studies use aggregate energy consumption and thus fail to identify the impacts of energy consumption by sources on the environment in order to fulfill the mentioned gaps in the literature this empirical study analyzes the influence of the real income renewable energy consumption non renewable energy consumption trade openness and financial development on co2 emissions in the ekc model for the top countries listed in the renewable energy country attractiveness index by employing heterogeneous panel estimation techniques with cross section dependence we find that the analyzed variables become stationary at their first differences by using the cadf and the cips unit root tests and the analyzed variables are cointegrated by employing the lm bootstrap cointegration test by using the fmols and the dols we also find that increases in renewable energy consumption trade openness and financial development decrease carbon emissions while increases in non renewable energy consumption contribute to the level of emissions and the ekc hypothesis is supported for the top renewable energy countries

how are we doing on poverty and hunger reduction a new measure of country performance abstract the paper presents a new composite indicator the poverty and hunger index phi to measure countries performance toward achieving millennium development goal no 1 mdg1 on halving poverty and hunger by 2015 building on the statistical structure of the human development index the phi combines all five official mdg1 indicators thereby generating insights on a country s net progress towards its own goal as opposed to progress measured by a single yardstick nonparametric analysis on the phi components provides further evidence on the nature of the relationship between poverty and hunger measures while cross country results show significant variance in progress between and within regions an extension of the phi allows for consideration of the rate of progress made by each country in its own terms that is based on where it needs to be to attain all 5 mdg1 targets by 2015 countries needing priority attention are identified as well as areas for future research and recommendations for post 2015 initiatives

can african countries efficiently build their economies on renewable energy abstract the translog production model is estimated to provide insights on the effectiveness of renewable energy for africa the analysis shows that capital labor renewable energy and nonrenewable energy drive output in african countries with renewable energy being a higher driver of growth than the conventional fossil fuels over the sample period this finding is reflective of the fact that renewable sources like wind hydro and solar account for a greater share of power generation in most african countries output elasticities computed for both energy types reaffirm the results and suggest that eastern and central african countries are more renewable energy dependent than the other three regions in addition technological progress is driven mainly by the efficiency with which various factors and energy inputs are used while africa has great potential of facing out conventional fossil energy the discussion provided in this study suggests that such transition is limited in practice due to issues of scale economics and sitting problems

trouble down on the farm what role for agriculture in meeting food needs in the next twenty years considerable optimism exists in the world today that the eradication of hunger is finally within reach gillespie mason and martorell pinstrup andersen for example on the food supply side the sixth world food survey 6wfs issued in 1996 by the food and agriculture organization fao makes note of a steady increase in per capita daily energy supply in 1979 81 and 1990 92 from 2 330 calories to 2 520 calories fao 1996b these numbers imply that for developing regions as a whole the proportion of individuals with inadequate estimated intakes has declined from 35 in 1969 71 to 20 in 199092 for child

coal consumption co2 emission and economic growth in china empirical evidence and policy responses this article investigates the relationship between coal consumption and income in china using both supply side and demand side frameworks cointegration and vector error correction modeling show that there is a unidirectional causality running from coal consumption to output in both the short and long run under the supply side analysis while there is also a unidirectional causality running from income to coal consumption in the short and long run under the demand side analysis the results also reveal that there is bi directional causality between coal consumption and pollutant emission both in the short and long run hence it is very difficult for china to pursue a greenhouse gas abatement policy through reducing coal consumption switching to greener energy sources might be a possible alternative in the long run

disaggregated industrial energy consumption and gdp the case of shanghai 1952 1999 abstract this paper investigates the causal relationship between various kinds of industrial energy consumption and gdp in shanghai for the period 1952 1999 using a modified version of the granger 1969 causality test proposed by toda and yamamoto j econ 66 1995 225 the empirical evidence from disaggregated energy series seems to suggest that there was a uni directional granger causality running from coal coke electricity and total energy consumption to real gdp but no granger causality running in any direction between oil consumption and real gdp

how energy technology innovation affects transition of coal resource based economy in china abstract the aim of this research paper is to investigate factors and mechanisms that may facilitate the transition from coal resource based economy to sustainability based on the energy technology innovation theory factors that may influence the transition of coal resource based economy were categorized into four types including innovation policy innovation input innovation ability and innovation organization hypotheses were proposed regarding the mechanisms of these factors data were collected from surveys administered to 314 chinese energy firms and a structural equation model sem was employed to test the hypotheses ten of fifteen hypotheses were retained based on the reliability tests validity tests and sem the results show that the four proposed factors are crucial in transforming the coal resource based economy and the effects become statistically significant through three intermediate variables namely transition of energy consumption structure correction of resource wealth investment and improvement of transition environment

estimation of electricity demand function for algeria revisit of time series analysis abstract this paper aims to empirically re examine whether economic growth has effect on electricity consumption for algerian economy we have incorporated urbanization and trade openness in electricity demand function as additional determinants of electricity consumption for the period of 1971 2012 for empirical purpose we have applied the recently developed combined cointegration test proposed by bayer and hanck 2013 and bounds testing approach to cointegration by pesaran et al 2001 for establishing the cointegration between the variables by accommodating structural breaks the results expose that income growth leads to higher electricity demand along with urbanization being another major contributing factor of rising electricity demand in contrast trade openness leads to reduce electricity demand the causal association between the variables is further examined with the application of innovation accounting approach of vector autoregressive var the empirical evidence indicates the presence of the neutral effect between income growth and electricity use urbanization causes electricity use and electricity use causes urbanization in granger sense

reviewing reforming and rethinking global energy subsidies towards a political economy research agenda this article provides a review of global energy subsidies of definitions and estimation techniques their type and scope their drawbacks and effective ways to reform them based on an assessment of both policy reports and peer reviewed studies this article presents evidence that energy subsidies could reach into the trillions of dollars each year it also highlights how most subsidies appear to offer net costs to society rather than benefits in the form of government deficits increased waste shortages of energy fuels and aggravated environmental impacts among others the review then talks about how tools such as best practices in measurement and estimation subsidy elimination impact studies and adjustment packages can dramatically reorient subsidies so that they become more socially and environmentally sustainable it also argues that such efforts need to explicitly learn from previous successes and recognize the importance of political economy the possible winners and losers to subsidy reform the final part proposes a future research agenda

structural decompositions of energy consumption between 1995 and 2009 evidence from wiod abstract energy is key to achieving sustainable development this paper explicitly distinguishes between the supply side of energy consumption and demand side of energy consumption and investigates the factors that affect the energy consumption across economies using data from the world input output database wiod this paper decomposes the relative changes of energy consumption into intensity effect production structure structural change in final demand total final demand effect and household consumption then it further decomposes production structure into inter industry structural effect and trade effect in intermediate inputs overall energy consumption growth is mainly driven by total final demand 55 04 increase at the world level but can be significantly reduced by intensity effect due to technological change 21 02 decrease at the world level there is heterogeneity of structure related effects across economies and within the same economy in both aspects of energy consumption in addition the trade effect and household effect are relatively small this paper provides an empirical framework for analyzing energy consumption in a globalizing world and suggests tailored and integrated energy policies

growth inequality and poverty looking beyond averages the evidence is compelling that the poor in developing countries do typically share in the gains from rising aggregate affluence and in the losses from aggregate contraction but how much do poor people share in growth do they gain more in some settings than others do some gain while others lose does pro poor growth mean more or less aggregate growth recent theories and evidence suggest some answers but deeper microeconomic empirical work is needed on growth and distributed change only then will we have a firm basis for identifying the specific policies and programs needed to complement and possibly modify growth oriented policies

on energy consumption and gdp studies a meta analysis of the last two decades abstract the relationship between energy consumption and gdp growth has been intensely examined in multiple frameworks set by various methods and countries this paper is a meta analysis of 51 studies published in the last two decades with worldwide data since 1949 on the relationship between energy consumption and gdp growth the aim is to systemize some of the factors that cause the variation of results in these studies our results yield evidence that the long run elasticity of gdp growth with respect to energy consumption is not independent of the method employed for cointegration the data type and the inclusion of variables such as the price level or capital in the cointegration equation also 1 increase in capital increases the elasticity of gdp with respect to energy consumption by 0 85

carbon emissions energy consumption and economic growth an aggregate and disaggregate analysis of the indian economy abstract this study investigates the long and short run relationships among carbon emissions energy consumption and economic growth in india at the aggregated and disaggregated levels during 1971 2014 the autoregressive distributed lag model is employed for the cointegration analyses and the vector error correction model is applied to determine the direction of causality between variables results show that a long run cointegration relationship exists and that the environmental kuznets curve is validated at the aggregated and disaggregated levels furthermore energy total energy gas oil electricity and coal consumption has a positive relationship with carbon emissions and a feedback effect exists between economic growth and carbon emissions thus energy efficient technologies should be used in domestic production to mitigate carbon emissions at the aggregated and disaggregated levels the present study provides policy makers with new directions in drafting comprehensive policies with lasting impacts on the economy energy consumption and environment towards sustainable development

exploring the bi directional long run relationship between energy consumption and life quality abstract this study aims at investigating the bi directional long run relationship for the period of 1990 2009 between energy consumption and life quality in 198 countries categorized by income level to achieve this goal the canonical cointegrating regression ccr was utilized the results revealed that energy consumption improves the life quality of 70 of the countries despite their different incomes the study s results unlike all other previous studies also revealed that the life quality indicators also increase energy consumption a phenomenon that appears to be true in 65 of the countries despite the fact that energy consumption plays an important role in achieving a better life quality the world still depends on fossil fuels which represent 81 of total energy consumption therefore it is suggested that these countries should rationalize their fossil fuel energy consumption by increasing the role of renewable energy and increasing their energy saving to improve life quality without causing any damage to the environment

cointegration and causality between electricity consumption and gdp empirical evidence from malawi abstract the granger causality gc and error correction ecm techniques were applied on 1970 1999 data for malawi to examine cointegration and causality between electricity consumption kwh and respectively overall gdp agricultural gdp agdp and non agricultural gdp ngdp cointegration was established between kwh and respectively gdp and ngdp but not with agdp the gc results detect bi directional causality between kwh and gdp suggesting that kwh and gdp are jointly determined but one way causality running from ngdp to kwh the ecm results detect causality running one way from gdp also from ngdp to kwh suggesting that a permanent rise in gdp may cause a permanent growth in electricity consumption

economic inequality and its socioeconomic impact abstract income inequality is of fundamental interest not only to economists but also to other social scientists a substantial literature in economics and the social sciences has investigated the relationship between income inequality and economic growth and a variety of social phenomena the links between inequality and economic growth are explored as well as those between inequality and such key social variables as political conflict education health and crime the analysis in this paper follows a two step process first a review of the empirical evidence relating inequality to growth and to each of the above social variables is undertaken second the various causal mechanisms that have been proposed in the social science literature to explain those links are surveyed

good and bad growth the human development reports abstract the 1996 human development report undp 1996 is about economic growth and human development in keeping with past reports in the series it emphasizes the diversity of country performance in improving human development indicators at given rates of growth this article reviews what the human development reports have said on this topic looking at how well the main messages have been supported by data and analysis and how compelling they are as a basis for public action

economic growth trade and energy implications for the environmental kuznets curve abstract the environmental kuznets curve ekc hypothesis asserts that pollution follows an inverted u path with respect to economic growth the ekc has been explained in terms of structural changes in the composition of economic output and increased environmental regulation at higher income levels while some authors have incorporated the impact of trade policy orientation on the ekc the impact of the actual movement between countries of goods that embody pollution has not been considered this paper attempts to econometrically quantify the effect using pooled cross country and time series data the ekc hypothesis is examined with respect to commercial energy consumption the source of many serious environmental problems it was found that while both industrializing and industrialized countries have added to their energy requirements by exporting manufactured goods the growth has been substantially higher in the former at the same time industrialized countries have been able to reduce their energy requirements by importing manufactured goods exports of manufactured goods by industrialized countries has thus been an important factor in generating the upward sloping portion of the ekc and imports by industrialized countries have contributed to the downward slope

the marginal and double threshold effects of regional innovation on energy consumption structure evidence from resource based regions in china abstract innovation driven energy consumption structure optimisation is crucial in developing countries china as a typical developing country has been shifting its economic development model from a traditional approach to innovation driven high quality development we select nine resource based regions in china as our research subject and employ a varying coefficient panel model and a hansen panel threshold model to quantify the marginal and threshold effects of innovation capacity in optimising energy consumption structure the results indicate that the overall energy consumption structure index for the analysed regions is 0 563 revealing that the structure is rather low and regional economic development relies mainly on low ranked energy astonishingly the marginal effect reflects obvious heterogeneity a positive effect in sichuan 0 208 yunnan 0 207 and xinjiang 0 431 nearly no effect in chongqing gansu and qinghai and a negative effect in guangxi 0 104 shaanxi 0 244 and ningxia 1 282 in previous studies such negative effects have been totally ignored further there are double thresholds and a unique driving mechanism namely negative driving strong positive driving weak positive driving interestingly below the first threshold improvement in innovation will lead to energy consumption structure degradation current policies such as introducing extensive talent are not feasible for all resource based regions the concerns of policy making for the three different threshold intervals should be upgrading industrial structures optimising the structure of human resources and preventing brain drain respectively

how much can co2 emissions be reduced if fossil fuel subsidies are removed abstract this paper analyzes consumers price elasticities of demand for fossil fuels and how a reduction of fossil fuel subsidies can lead to important reduction in co 2 emissions for various groups of countries that have relatively high fossil fuel subsidies and notably on diesel including countries in the middle east and north africa mena these countries continue to maintain significant levels of fuel subsidies with iran and saudi arabia being the largest contributors to co 2 emissions this paper illustrates that fuel price policy reforms by these countries would be an important instrument for both climate and economic policies we estimate that a reduction in subsidies to both gasoline and diesel by about 20 us cents per liter will lead to significant decreases in co 2 emissions both in the mena region and globally in iran for example the reductions could be up to 90 and 50 of current emissions generated from diesel and gasoline consumption respectively and for saudi arabia approximately 70 and 40 respectively

the big push deja vu a review of jeffrey sachs s the end of poverty economic possibilities for our time jeffrey sachs s new book the end of poverty economic possibilities for our time penguin press new york 2005 advocates a big push featuring large increases in aid to finance a package of complementary investments in order to end world poverty these recommendations are remarkably similar to those first made in the 1950s and 1960s in development economics today as then the big push recommendation overlooks the unsolvable information and incentive problems facing any large scale planning exercise a more promising approach would be to design incentives for aid agents to implement interventions piecemeal whenever they deliver large benefits for the poor relative to costs

some evidence of the winner s curse the mathematical complexity of auction theory has restricted empirical work to qualitative tests of its basic predictions with mixed results this paper exploits the theory of order statistics to derive a nash bid function that is linear in its parameters allowing direct estimati on by linear least squares the bid function is fitted to a cross section of auctions for highway construction contracts from thirty three states and provides support for several hypotheses of the theory of common value auctions copyright 1988 by american economic association

energy consumption with sustainable development in developing country a case in jiangsu china abstract jiangsu is one of the provinces in china that have great population density and fast economic development therefore it is important to ensure large quantity of stable and high quality energy supply for its development with the development of the economy the demand for energy is increasing very fast while the energy supply is going short the supply of the local primary energy is only 23 of the demand the final energy consumption reaches 78 mtce 1 tce 7 000 000 kcal among which the industry and construction account for 78 though the total consumption is large the energy consumption per capita is only 1 13 tce the electricity consumption per capita 1017 kw and the household electricity consumption per capita is 138 kw coal accounts for about 76 of the total energy consumed this paper discusses utilization ratio of energy and the serious pollution caused by energy consumption

an international literature survey on energy economic growth nexus evidence from country specific studies in this paper an extensive review of the rapidly growing in the literature on the nexus between economic growth and four types of energy consumption total energy consumption electricity consumption nuclear consumption and renewable consumption the various hypotheses associated with the causal interaction between these variables along with a survey of the empirical literature are also discussed the survey focuses on country coverage periods modeling techniques and empirical conclusions a general observation from these studies that results are found to be sensitive to methodology and type of energy considered the empirical results for the specific countries surveyed show that i for energy consumption growth nexus 29 supported the growth hypothesis 27 the feedback hypothesis 23 the conservation hypothesis and 21 the neutrality hypothesis ii for the electricity consumption growth nexus 40 supported the growth hypothesis 33 the feedback hypothesis and 27 conservation hypothesis iii for the nuclear consumption growth nexus 60 supported the neutrality hypothesis and 40 the growth hypothesis and iv for the renewable consumption growth nexus 40 supported the neutrality hypothesis 40 the conservation hypothesis and 20 the growth hypothesis these mixed results may be attributed to the different used data selected variables and econometric approaches undertaken

the hydroelectricity consumption and economic growth in asian countries evidence using an asymmetric cointegration approach this study examines the four commonly tested hypotheses in hydroelectricity consumption economic growth literature for 12 asian countries our results from a recently developed hidden cointegrati

renewable electricity consumption and economic development new findings from the baltic countries abstract this study employed homogeneous and heterogeneous panel methods to examine the relationship between renewable and non renewable electricity consumption and economic development in three transition economies in the baltic region namely estonia latvia and lithuania for the period of 1992 2011 the study put forward four hypotheses to examine the renewable electricity development nexus the findings indicated that there existed a unidirectional causality from the economic development to renewable electricity consumption thus the results obtained from the statistical analyses have provided empirical evidence in support of the conservation hypothesis that postulates that economic development causes the expansion of renewable electricity consumption but not vice versa

energy innovation and renewable energy consumption in the correction of air pollution levels abstract this study analyses the relationship between economic growth and environmental pollution specifically it investigates the presence of an environmental kuznets curve ekc in 17 oecd countries over the period of 1990 2012 the results confirm the existence of an n shaped ekc relationship between income and environmental degradation the study offers a novel methodological contribution that makes it possible to explain the environmental pollution process through the analysis of low carbon technologies this demonstrates how income levels affect energy consumption and how higher energy demand leads to a larger share of fossil sources in the energy mix and thus increased greenhouse gas ghg emissions the effect on per capita ghg emissions is explored in a model containing a dampening variable that moderates the relationship between energy consumption and income this empirical evidence helps to explain the interaction between energy regulation economic growth and carbon emissions this study also confirms the positive effect that energy innovation process exerts on environmental pollution finally it is noted that renewable energy sources help to improve air quality

the inequality adjusted human development index a constructive proposal abstract this paper proposes a method to incorporate a concern for distributional inequalities of income education and longevity into the framework of the human development index hdi as it is presently designed by the united nations development programme the paper constructs gini coefficients for a set of 20 developing countries measuring inequalities in annual income educational attainment and life span attainment these calculations are combined with data from the hdi to produce an inequality adjusted human development index iahdi the implications of this proposed index for evaluating and promoting development are considered

bidding in common value auctions how the commercial construction industry corrects for the winner s curse experienced construction industry executives suffer from a winner s curse in laboratory common value auction markets dyer et al dyer d j h kagel d levin 1989 a comparison of naive and experienced bidders in common value offer auctions laboratory analysis econom j 99 108 115 this paper identifies essential differences between field environments and the economic theory underlying the laboratory markets that account for the executives success in the field and a winner s curse in the lab these are 1 industry specific mechanisms which enable contractors to escape the winner s curse even when they bid too low 2 learned industry specific evaluative processes which enable experienced contractors to avoid the winner s curse in the first place and 3 important private value elements that underlie bidding also identified are a number of industry specific bidding characteristics whose evolution can be explained using modern auction theory lessons are drawn regarding the use of experime

low carbon transition in a distributed energy system regulated by localized energy markets abstract low carbon transition becomes an urgent need of modern societies for energy conservation and environmental protection the purpose of this work is to evaluate the roles of market regulation energy consumption and energy capacity in low carbon transition for distributed energy systems through an agent based simulation a set of agent behavioral rules for the competition of high carbon and low carbon energies mimics the local dynamics of the energy production of distributed energy systems and the energy consumption of industrial firms under the impact of energy market fluctuation simulation results show that under the condition of increased energy capacities with a positive feedback between supply and demand low carbon transition can be facilitated by the combination of market adjustment favoring low carbon energies and the policy adjustment for low energy consumptions by contrast with low energy capacities and high energy consumptions transitions from high carbon economy to low carbon economy inevitably render a catastrophic economic depression policy implications for different situations of countries are drawn regarding the regulation of localized energy markets for restricting the supply of high carbon energy while cultivating the demand for low carbon energy and the improvement on energy saving energy production efficiency and storage capacity

the relationship between energy consumption energy prices and economic growth time series evidence from asian developing countries this paper estimates the causal relationships between energy consumption and income for india indonesia the philippines and thailand using cointegration and error correction modelling techniques the results indicate that in the short run unidirectional granger causality runs from energy to income for india and indonesia while bidirectional granger causality runs from energy to income for thailand and the philippines in the case of thailand and the philippines energy income and prices are mutually causal the study results do not support the view that energy and income are neutral with respect to each other with the exception of indonesia and india where neutrality is observed in the short run c 2000 elsevier science b v all rights reserved jel classifications c22 q43 q48

energy efficiency analysis of g7 and brics considering total factor structure abstract energy is the driving force of world economy with the increase in the world s population and consumption additional efforts must be made to guarantee energy availability for all economies and consequently to avoid a number of serious problems related to its scarcity therefore measures to ensure energy efficiency are now a priority for any nation willing to develop its economy given the fast economic development seen in the brics group which has played an important role in the global economy the objective of this study is to measure and analyze energy efficiency in the countries that comprise the brics group brazil russia india china and south africa and the g7 group canada france germany italy japan united kingdom and united states considering the total factor structure for this data envelopment analysis was used with slacks based measure model and the window analysis and the total factor energy efficiency index was calculated from the slacks provided by this tool for the countries analyzed the model used as inputs gross fixed capital formation and workforce and energy consumption additionally two outputs were used carbon dioxide emissions undesirable output and gross domestic product desired output moreover the factors that lead to better energy efficiency measures were sought using an econometric model the results indicate that the brics and g7 are statistically different groups and therefore justify being analyzed separately energy efficiency in brics ranged from 23 54 to 99 95 with brazil as the country which had the highest total factor energy efficiency index in the analysis performed for the g7 group every country had a total factor energy efficiency index above 95 the tobit model was used and the results show that patents are significant for energy efficiency in the brics countries while in the g7 countries the gross domestic product per capita measured by purchasing power parity life expectancy and years of schooling are significant these findings indicate that in the brics countries the results of energy efficiency measures are more related to investments in low energy consumption technologies while in the g7 countries the energy efficiency tends to be better when countries have better social conditions which in addition to high life expectancy ensures a fair income distribution the results of this study are important in terms of being useful for public policies related to energy efficiency especially 1 to contribute to the discussions related to evaluating the countries energy use helping to identify those with the best practices with regard to environmental and economic aspects in each group and 2 to guide policy decisions regarding government incentives to promote the development of efficient countries in terms of economic growth with minimal use of resources capital labor energy without harming the environment

the impact of foreign direct investment on environmental quality a bounds testing and causality analysis for turkey abstract this study aims to investigate the impact of foreign direct investment fdi together with gross domestic product gdp the square of gdp and energy consumption on carbon dioxide co2 emissions in turkey over the period 1974 2010 we employ both the bounds test approach which has superior properties especially in small samples and the hatemi j test which takes structural breaks into consideration in the co integration analysis due to the co integration relationship between co2 emissions and other variables the autoregressive distributed lag ardl model is used in order to investigate short and long run elasticity between the variables the long run coefficients of the ardl model indicate that the effect of fdi on co2 emissions is positive but relatively small while the effects of the gdp and energy consumption on co2 emissions are quite considerable moreover the short run coefficients obtained by the error correction model ecm are found to be similar to those of the long run model the findings support the validity of the environmental kuznets curve ekc hypothesis in both time horizons the vector ecm based granger causality test is also applied to investigate the causal link the causality test results indicate the existence of a causality running from all explanatory variables to co2 emissions in the long run overall the findings suggest that turkey should promote energy efficiency with sustainable growth and encourage more fdi inflows particularly in technology intensive and environment friendly industries to improve environmental quality

energy use and output growth in canada a multivariate cointegration analysis using a neo classical one sector aggregate production technology where capital labor and energy are treated as separate inputs this paper develops a vector error correction vec model to test for the existence and direction of causality between output growth and energy use in canada using the johansen cointegration technique the empirical findings indicate that the long run movements of output labor capital and energy use in canada are related by two cointegrating vectors then using a vec specification the short run dynamics of the variables indicate that granger causality is running in both directions between output growth and energy use hence an important policy implication of the analysis is that energy can be considered as a limiting factor to output growth in canada

information returns and bidding behavior in ocs auctions 1954 1969 this paper examines federal auctions for leases on the outer continental shelf in the light of the predictions of the first price sealed bid common values model of auctions the authors find that the data strongly support the model for auctions in which one bidder is better informed than the other bidders the evidence for auctions in which bidders have noisy but qualitatively similar information is less conclusive but is consistent with a model in which each bidder does not know either the actual or potential number of bidders on a lease copyright 1987 by blackwell publishing ltd