what you don t see can t hurt you an economic analysis of morality laws this paper provides an efficiency explanation for regulation of sex drugs and gambling we propose that these morality laws can be explained by considering some activities to impose a negative externality when the activity is observed efficiency requires discretion by the individual who engages in such activities when discretion is difficult to regulate directly the activities can instead be proscribed thereby giving individuals incentive to hide their actions from others we find conditions for the first best levels of consumption and hiding to be implementable since some level of activity is efficient the optimal sanctions are not maximal ce memoire propose une explication en termes d efficacite des regulations sur les industries du sexe de la drogue et du jeu organise on suggere que ces lois de moralite peuvent etre expliquees quand on considere que certaines activites imposent une externalite negative quand l activite est observee l efficacite reclame donc une certaine discretion de la part de l individu qui s engage dans de telles activites quand cette discretion est difficile a reglementer directement les activites peuvent etre prohibees et de ce fait on donne aux individus une incitation a cacher leurs activites aux autres on etablit que des conditions de premier ordre sur les niveaux de consommation et de camouflage peuvent etre mises en application puisque qu un certain niveau d activite est efficace les peines optimales ne sont pas maximales

co2 emissions energy consumption and economic growth in china a panel data analysis this paper examines the causal relationships between carbon dioxide emissions energy consumption and real economic output using panel cointegration and panel vector error correction modeling techniques based on the panel data for 28 provinces in china over the period 1995 2007 our empirical results show that co2 emissions energy consumption and economic growth have appeared to be cointegrated moreover there exists bidirectional causality between co2 emissions and energy consumption and also between energy consumption and economic growth it has also been found that energy consumption and economic growth are the long run causes for co2 emissions and co2 emissions and economic growth are the long run causes for energy consumption the results indicate that china s co2 emissions will not decrease in a long period of time and reducing co2 emissions may handicap china s economic growth to some degree some policy implications of the empirical results have finally been proposed

a search theoretic model of the retail market for illicit drugs a search theoretic model of the retail market for illegal drugs is developed trade occurs in bilateral potentially long lived matches between sellers and buyers buyers incur search costs when experimenting with a new seller moral hazard is present because buyers learn purity only after a trade is made this model is consistent with some new stylized facts about the drugs market and it is informative for policy design the effectiveness of different enforcement strategies is evaluated including some novel ones that leverage the moral hazard present in the market copyright oxford university press

a dynamic approach to the environmental kuznets curve hypothesis abstract the environmental kuznets curve ekc hypothesis states that pollution levels increase as a country develops but begin to decrease as rising incomes pass beyond a turning point in ekc analyses the relationship between environmental degradation and income is usually expressed as a quadratic function with the turning point occurring at a maximum pollution level other explanatory variables have been included in these models but income regularly has had the most significant effect on indicators of environmental quality one variable consistently omitted in these relationships is the price of energy this paper analyzes previous models to illustrate the importance of prices in these models and then includes prices in an econometric ekc framework testing energy income and co2 income relationships these long run price income models find that income is no longer the most relevant indicator of environmental quality or energy demand indeed we find no significant evidence for the existence of an ekc within the range of current incomes for energy in the presence of price and trade variables

assessing income population and technology impacts on co2 emissions in canada where s the ekc abstract this study investigates the macroeconomic forces underlying carbon dioxide co2 emissions from fossil fuel use in canada in keeping with the relevant literature on environmental degradation three forces are expected to influence co2 emissions gross domestic product per capita gdp capita population and technological change while previous work has employed reduced form models that allow for non linear relationships between co2 and gdp capita it has been common practice to assume linear relationships between co2 and the latter two variables this study tests a more flexible model using a five region panel data set in canada over the period 1970 2000 findings indicate that gdp capita is unrelated to co2 that an inverted u shaped relationship exists with population and that a u shaped relationship exists with technology thus technological and population changes are supported over the commonly hypothesized environmental kuznets curve an inverted u shaped relationship between gdp capita and environmental degradation for affecting co2 emissions from fossil fuel use in canada

labor supply in the presence of taxes an alternative specification this paper estimates a model of married women s labor supply in the presence of progressive taxes the specification is based on a translog indirect utility function with normally distributed random preference parameters the application of roy s identity then leads to a distribution of labor supply that involves ratios of normals

does income inequality harm the environment empirical evidence from the united states abstract this study revisits the growth inequality environment nexus in the context of country specific time series data the short and long run effects of income inequality economic growth and energy consumption on co2 emissions in the u s are examined using the autoregressive distributed lag ardl approach we find that more equitable distribution of income in the u s results in better environmental quality in the short and long run it is also found that in both the short and long run economic growth has a beneficial effect on environmental quality whereas energy consumption has a detrimental effect on the environment

labour supply estimation and public policy abstract economists devote considerable energies towards refining their econometric techniques to overcome difficulties connected with conducting empirical research despite advances in technique it is not clear whether further refinement in this direction is worthwhile for policy purposes it may be that no further amount of statistical adjustment of inadequate data will increase understanding and that better data is simply necessary to add to our knowledge but rarely is sufficient credit paid to new forms of data in short econometric technique is emphasized to the neglect of data innovation as if new data were merely lying about waiting for an ingenious suggestion for use this paper surveys advances of the last twenty five years in estimating labour supply for policy purposes with a view towards appreciating the relative contribution of both improvements in econometric technique as well as developments of new data after briefly detailing the key parameters which economists have sought to estimate we describe the early first generation research circa 1970 which is plagued by problems of unobservable variables measurement errors truncation and selectivity bias and non linear budget constraints second generation research constitute attempts to resolve one or more of these difficulties and the respective contribution of econometric technique and new data is acknowledged and assessed including the contribution of data generated by large scale social experiments in which participants are randomly assigned to different guaranteed income plans and their labour supply behaviour measured

what price drug use the contribution of economics to an evidence based drugs policy abstract this paper presents a review of the recent economics literature in the area of illicit drug use particular attention is paid to the economics of addiction and the rational addiction model the welfare economics framework for analysing the social costs of drug use and the attempts that have been made by economists to evaluate recent or proposed policy interventions a dominant theme in this review is the problem of poor data availability this is particularly true when it comes to implementing the rational addiction model but it is also apparent in the literature on estimating the costs of illicit drug use to society as a whole one of the main conclusions of this review is that until recently public policy has not been particularly influenced by research carried out by economists it is not clear whether this is because economists have had to grapple with inadequate data and hence their conclusions are couched in uncertainty or whether it is because drugs researchers have assumed a very limited role for economists in their analysis

prohibition and the supply of brazilian mahogany we use a unique data set to investigate the economic consequences of banning the harvest and trade of brazilian mahogany because we find strong evidence that mahogany is smuggled out of brazil as other tropical species through formal export mechanisms we are able to construct a time series of quantities and implicit export prices covering both the periods before and after prohibition our finding suggests that a trade ban increases supply and makes the illegal good more affordable our analysis can offer important insights into other illegal markets such as those for narcotics and products manufactured from endangered animal species

interrelationships between income health and the environment extending the environmental kuznets curve hypothesis abstract this paper examines the link between the health indicators and the environmental variables for a cross section of countries widely dispersed on the economic development spectrum while environment and income are seen to have an inverted u shaped relationship environmental kuznets curve ekc hypothesis it is also well established that environment and health are positively related our study focuses on the implications of this for the relationship between health and income in the early phases of income growth the gains in health and the losses in environmental quality could cancel each other out and this challenges the idea that as incomes increase health would always improve to empirically analyse these issues we estimate a two stage least squares model that focuses on the impact of income and the environment on health status with environment being an endogenous variable our results show that the environmental stress variable has a significant negative effect on health status at the same time gross national product gnp levels are shown to vary positively with health status variables we find that the health gains obtained through improved incomes can be negated to a significant extent if the indirect effect of income acting via the environment is ignored research findings in this regard would be a useful policy instrument towards maximising both the environmental and health gains that come with economic growth and development

the proposals for a european tax on co2 and their implications for intercountry distribution this paper analyzes the advantages andimplications of the implementation of aeuropean tax on carbon dioxide emissions as anown resource of the eu and it focuses on itseffects on intercountry distribution incontrast to a harmonized tax which would onlyhave distributive effects within each memberstate a tax collected at european scale wouldalso have important distributive effects amongdifferent countries these effects would alsodepend on the use of tax revenues the paperinvestigates through a simple empiricalanalysis the distributive effects among themember states of three tax models a pureco2 model a 50 50 energy co2model and a co2 model with a burden onnuclear power

drugs policy what should we do about cannabis public policy has failed to prevent large scale consumption of cannabis in most developed countries so what if anything should we do to change the policy environment cannabis consumption is unambiguously harmful in several ways but this does not automatically justify the prohibitionist policy dictated by the international drugs conventions this paper sets out the arguments for policy intervention in the cannabis market and reviews the directions of policy change that have been called for we argue that existing theoretical insights and empirical evidence give little compelling reason to prefer prohibition to the alternative of legalization of cannabis with harms controlled by regulation and taxation given this conclusion and the much wider prevalence of cannabis than of harder drugs a reasonable way forward is to remove cannabis production and consumption but not trade from the current prohibitionist un drug control treaties to allow countries to adopt their own policies thus generating new evidence on the potential impacts of a wider range of policy stephen pudney

alcohol consumption during prohibition we estimate the consumption of alcohol during prohibition using mortality mental health and crime statistics we find that alcohol consumption fell sharply at the beginning of prohibition to approximately 30 percent of its pre prohibition level during the next several years however alcohol consumption increased sharply to about 60 70 percent of its pre prohibition level the level of consumption was virtually the same immediately after prohibition as during the latter part of prohibition although consumption increased to approximately its pre prohibition level during the subsequent decade this abstract was borrowed from another version of this item

marijuana on main street estimating demand in markets with limited access abstract marijuana is the most common illicit drug with vocal advocates for legalization among other things legalization would increase access and remove the stigma of illegality our model disentangles the role of access from preferences and shows that selection into access is not random we find that traditional demand estimates are biased resulting in incorrect policy conclusions if marijuana were legalized those under 30 would see modest increases in use of 28 percent while on average use would increase by 48 percent to 19 4 percent tax policies are effective at curbing use where australia could raise au 1 billion and the united states us 12 billion jel d12 h25 k14 k42

stoking the fires co2 emissions and economic growth abstract we examine the relationship between economic development and carbon dioxide emissions a greenhouse gas central to global warming predictions estimates derived from global panel data suggest a diminishing marginal propensity to emit mpe carbon dioxide as gdp per capita rises despite this global carbon dioxide emissions growth will continue at 1 8 percent per annum for the foreseeable future a result that is not sensitive to average output growth instead emissions growth continues because output and population will grow most rapidly in lower income nations with high mpes this latter feature emphasizes the distributional consequences of policies to reduce emissions

carbon intensity as a proxy for environmental performance and the informational content of the epi we analyze the relationship between carbon intensity and epi and find that the informational content of epi is in large part explainable by the state of economic growth and level of carbon intensity with the second variable being already an increasing function of emissions and a decreasing function of economic well being carbon intensity has the largest explanatory power for epi rankings and consistently produces the correct anticipated negative sign in its relationship to epi second in importance are the renewable energy sources which also produce consistent results with respect to their impact on the epi but with much lower explanatory power our results suggest that advanced countries should as they are doing already implement measures of high quality environmental content while measures for increasing economic growth while controlling emissions are appropriate for developing countries a number of other energy policy implications and the use of new technologies are also discussed in the context of our analysis

international narcotics trade foreign aid and enforcement i introduction it is widely accepted that the problems that a country may face as a direct result of narcotics related activities are numerous 1 moreover drug production and trade are intimately tied to other serious international concerns notably the financing of insurgencies and terrorist activities shughart 2006 keefer loayza and soares 2008 intriligator 2010 piazza 2011 a prime example is the involvement of the taliban in afghanistan in the production and trafficking of heroin see blanchard 2009 clemens 2013a 2013b similar issues are observed in colombia and mexico hence the indirect costs of narcotics related activities are also substantial nonetheless the enforcement of prohibitions on the production consumption and movement of narcotics remains among the most controversial issues in international relations not least because the global response has met with somewhat limited success 2 even taking the objective of reducing global consumption of narcotics as given it is unclear which of the available policy tools are likely to be the most effective at meeting the objective the consumption and distribution in narcotics importing countries can be targeted directly although the history of the past one and a half centuries indicates that it is very difficult alternatively and more realistically the supply side can be targeted law enforcement authorities in narcotics exporting countries can be used to eradicate production facilities and to interdict trafficking and alternative production activities can be encouraged by providing technical assistance or by direct subsidization in all cases involving the supply side however it must be recognized that the global production of narcotics is concentrated in developing economies many of these countries lack the enforcement resources to engage effectively against well funded producers and well armed traffickers and their supporting terrorist and rebel groups therefore foreign aid to finance law enforcement activities is essential 3 alternative development policies may also be supported through foreign technical assistance or by directing foreign aid toward alternative production subsidies the effects of these policies on narcotics exporting economies have not however been adequately addressed in the literature our work adds a new dimension to the existing literature on the economics of narcotics 4 we construct a theoretical model that explores the effects of foreign financing of anti narcotics enforcement activities in narcotics producing exporting countries along with other potential policy interventions while previous literature has taken a partial equilibrium approach to analyzing related issues our work differs substantially in adopting general equilibrium methods as martin and symansky 2006 note opium production in afghanistan for example accounted for approximately 27 of economic activity in 2005 2006 given this fact substantial general equilibrium effects must be present and deserve full exploration we focus attention on the consequences of the multitude of severe distortions that narcotics production and enforcement introduce to factor markets we envisage an economy where workers engage in both licit and illicit activities are paid a premium for the risk of incarceration or seizure of their marginal product involved in the latter and a nonproductive law enforcement sector uses real resources to combat illicit activity our work draws on a number of strands of economic theory including tied aid factor market distortions dual economies illicit markets and law enforcement a number of important new results emerge from our analysis foreign aid will increase enforcement activity and will generally lower narcotics production the more market power the narcotics producing country has the less effective foreign aid will be however in fact aid intended for anti narcotics enforcement may effectively be siphoned into the wages of narcotics workers

economic growth and emissions reconsidering the empirical basis of environmental kuznets curves abstract recent empirical research indicates that certain types of emissions follow an inverted u or environmental kuznets curve ekc as income grows this regularity has been interpreted as a possible de linking of economic growth and patterns of certain pollutants for developed economies in this paper the empirical basis of this result is investigated by considering some statistical particularities of the various ekc studies performed it is argued that the inverted u relationship between income and emissions estimated from panel data need not hold for specific individual countries over time based on insights from intensity of use analysis in resource economics an alternative growth model is specified and estimated for three types of emissions co2 nox and so2 in four countries netherlands uk usa and western germany it is found that the time patterns of these emissions correlate positively with economic growth and that emission reductions may have been achieved as a result of structural and technological changes in the economy sustainable growth is defined as the rate of economic growth that does not lead to growth in emissions its rate is calculated for each type of emission and country based on estimated parameter values the resulting indicators reflect a balance between the positive influence of growth and negative influence of structural change and technological progress on emission levels

developments in the throughput income relationship theoretical and empirical observations abstract it has been suggested that the relationship between income and the associated environmental pressure in terms of derived materials inputs and pollution levels may take an inverted u shape indicating a delinking of environmental pressure from economic growth in relation to rising per capita incomes the likelihood of such a relationship being persistent is discussed in the context of a simple macro model of industrial metabolism and the possibility of relinking clearly emerges data on specific indicators of environmental pressure i e the throughput of materials energy and the volume of transport in 19 countries have been used to investigate patterns of delinking the results suggest that delinking may not be persistent already some advanced economies may be entering a new period of relinking the relationships between environmental pressure and welfare in the medium long term may be n shaped rather than inverted u shaped

economic liberalization and violent crime abstracti study the effect of economic liberalization on violent crime the particular emphasis is on the case of india where in the years following 1991 there was a virtual dismantling of controls on entry and production in registered manufacturing this was accompanied by a significant reduction in impediments to foreign trade and access to foreign exchange economic controls create an incentive for illegal trade and a frequent by product of illegal trade is violent crime consequently violent crimes such as murders would be expected to decline following market based reforms analysis of aggregate all india data as well as data at the state level suggests that economic reforms did indeed lead to a reduction in violent crime i extend the analysis to a panel of countries and find strong evidence that greater trade openness is negatively related to violent crime

environmental kuznets curve among brics countries spot lightening finance transport energy and growth factors abstract the environmental sustainability reforms considered the highly successful factor for the countries that devoted for green investment in transportation financial activities energy demand and growth factors this challenging task is monetized by fair environmental policies that integrated with the countries action plans brics countries is no exception that wider accepted this environmental task and provoked the need of healthy investment for sustainable growth this study reviewed finance transport energy and growth factors under environmental kuznets curve ekc framework in a panel of brics countries by utilizing a consistent time series data from 1990 to 2015 the study employed panel fixed effect regression to observe unmodeled heterogeneity among the cross section identifiers that vary over a period of time the results show that transport services and industry value added indvad both escalate fossil fuel ffuel energy consumption while financial factors environmental prices and renewable energy consumption rec decreases fossil energy in a region bank capital broad money supply domestic credit railways goods transported travel services and indvad considerably increases nitrous oxide emissions n 2 o whereas rec significantly decreases n 2 o emissions in a panel of countries greenhouse gas ghg emissions affected by domestic credit railways goods transported travel services and indvad there is a monotonic decreasing relationships between i per capita income and ffuel energy ii railways passenger carried and n 2 o emissions iii rec and ghg emissions and iv income and n 2 o emissions whereas there is an inverted u shaped relationship between broad money supply and n 2 o emissions and u shaped relationships between per capita income and ghg emissions the panel causality tests confirmed the bidirectional relationship between financial indicators and railways transportation while bank capital granger cause ffuel energy per capita income indvad and rec but not other way around in a panel of brics countries the inter temporal relationships show that bank capital indvad and price level will largely affect ffuel energy n 2 o emissions and ghg emissions respectively for the next 10 years period the results of the study emphasized the need of green policy instruments that should be connected with the country s policies and program for sustained growth

does drug illegality beget violence evidence from the crack cocaine wave in sao paulo mimicking the so called great american crime decline violent crime in the state of sao paulo dropped sharply in the 2000s after rising steadily throughout the 1980s and 1990s this paper evaluates the role of crack cocaine in explaining the aggregate dynamics in violence four facts are established first the aggregate data show a tight comovement between the prevalence of crack cocaine and homicides second using city level apprehension and possession data i find a strong elasticity of violent crime with respect to crack cocaine after controlling for year fixed effects city effects and many time varying covariates i use the estimated elasticity to compute the contribution of crack cocaine to aggregate violence crack explains 30 percent of time series variation in the data third only drug trafficking not drug possession has an impact on homicides finally i find no impact on property crimes a weaker impact on attempted murder and interestingly a weak negative impact on aggravated assault the theory suggests that both facts only trafficking matters and crack affects only homicides not property crime can be rationalized only if drug induced crime is driven by systemic violence induced by illegality itself these results are important for policy because they suggest that violence will not follow the legalization of both the possession and trade of powdered cocaine or crack cocaine

a theory of rational addiction we develop a theory of rational addiction in which rationality means a consistent plan to maximize utility over time strong addiction to a good requires a big effect of past consumption of the good on current consumption such powerful complementarities cause some steady states to be unstable they are an important part of our analysis because even small deviations from the consumption at an unstable steady state can lead to large cumulative rises over time in addictive consumption or to rapid falls in consumption to abstention our theory also implies that cold turkey is used to end strong addictions that addicts often go on binges that addicts respond more to permanent than to temporary changes in prices of addictive goods and that anxiety and tensions can precipitate an addiction

addiction and cue triggered decision processes we propose a model of addiction based on three premises 1 use among addicts is frequently a mistake 2 experience sensitizes an individual to environmental cues that trigger mistaken usage 3 addicts understand and manage their susceptibilities we argue that these premises find support in evidence from psychology neuroscience and clinical practice the model is tractable and generates a plausible mapping between behavior and the characteristics of the user substance and environment it accounts for a number of important patterns associated with addiction gives rise to a clear welfare standard and has novel implications for policy

economic growth and environmental degradation the environmental kuznets curve and sustainable development abstract in this paper we critically examine the concept of the environmental kuznets curve ekc it proposes that there is an inverted u shape relation between environmental degradation and income per capita so that eventually growth reduces the environmental impact of economic activity the concept is dependent on a model of the economy in which there is no feedback from the quality of the environment to production possibilities and in which trade has a neutral effect on environmental degradation the actual violation of these assumptions gives rise to fundamental problems in estimating the parameters of an ekc the paper identifies other econometric problems with estimates of the ekc and reviews a number of empirical studies the inference from some such ekc estimates that further development will reduce environmental degradation is dependent on the assumption that world per capita income is normally distributed when in fact median income is far below mean income we carry out simulations combining ekc estimates from the literature with world bank forecasts for economic growth for individual countries aggregating over countries to derive the global impact within the horizon of the bank s forecast 2025 global emissions of so 2 continue to increase forest loss stabilizes before the end of the period but tropical deforestation continues at a constant rate throughout the period

environmental kuznets curve for co2 in canada abstract according to the environmental kuznets curve hypothesis the relationship between per capita gdp and per capita pollutant emissions has an inverted u shape this implies that past a certain point economic growth may actually be profitable for environmental quality most studies on this subject are based on estimating fully parametric quadratic or cubic regression models while this is not technically wrong such an approach somewhat lacks flexibility since it may fail to detect the true shape of the relationship if it happens not to be of the specified form we use semiparametric and flexible nonlinear parametric modeling methods in an attempt to provide more robust inferences we find little evidence in favour of the environmental kuznets curve hypothesis our main results could be interpreted as indicating that the oil shock of the 1970s has had an important impact on progress towards less polluting technology and production

energy intensity co2 emissions and the environmental kuznets curve the spanish case this article analyses the role of energy intensity and the relationship between co2 emissions and primary energy in order to explain the evolution of co2 emissions by unit of real gdp it also distinguishes two different meanings of co2 emissions kuznets curve hypothesis the weak and the strong sense it considers the case of spain in the period 1972 1997 as an example in which there is not any evidence supporting this hypothesis in either sense

what proportion of renewable energy supplies is needed to initially mitigate co2 emissions in oecd member countries in spite of increasing numbers of countries having established renewable energy development mechanisms for carbon dioxide co2 emissions reduction the co2 emissions problem continues to worsen along with the growth of the world economy this leads us to examine the threshold effect of the proportion of renewable energy supply for co2 emissions reduction by means of the panel threshold regression model ptr economic growth and the price of energy are also both taken into account in the model in measuring the specific influence that each of them has on co2 emissions the empirical panel data encompass all 30 member countries of the oecd and cover a period of about a decade in length from 1996 to 2005 our empirical results provide clear evidence of the existence of a single threshold effect that may be divided into lower and higher regimes based on the specific estimates of the slope coefficients in each regime distinguished we find that a renewable energy supply accounting for at least 8 3889 of total energy supply would mean that co2 emissions would start to be mitigated furthermore real gdp and the cpi of energy are significantly and positively and insignificantly and negatively correlated with co2 emissions respectively these findings lead us to conclude that the authorities ought to enhance the proportion of renewable energy supply to more than 8 3889 of all energy supplied which might help resolve the dilemma between economic growth and co2 emissions realizing the effects of co2 emissions reduction via energy price reforms or the levying of a carbon tax levy may however still remain a puzzle

the environmental impact of industrialization and foreign direct investment abstract in recent years the major concern about the environment has been the emissions of greenhouse gases and the consequent impact on climate change there is a huge interest among scholars in examining factors that contribute to environmental degradation in this study we examined the environmental impact of foreign direct investment and industrialization in 36 selected african countries using data for the period 1980 2014 we proxied the environment with a number of factors including carbon dioxide nitrous oxide methane and total greenhouse gases emissions employing the pooled mean group estimation technique we found that the effect of industrialization on the environment is generally insignificant however the effect of foreign direct investment on the environment is found to be largely significant policy implications of these findings are discussed

the nexus between carbon emissions energy consumption and economic growth in middle east countries a panel data analysis abstract the environmental kuznets curve ekc hypothesis assumes that there is an inverted u shaped relationship between environmental degradation and income per capita in other words as a country grows it is assumed that its environmental quality improves in this study we aim to test the ekc hypothesis for 12 middle east countries during the period 1990 2008 by employing recently developed panel data methods our results provide evidence contrary to the ekc hypothesis we found evidence favorable to the u shaped ekc for 5 middle east countries whereas an inverted u shaped curve was identified for only 3 middle east countries furthermore there appear to be no causal links between income and co 2 emissions for the other 4 countries regarding the direction of causality there appears to be a unidirectional causality from economic growth to energy consumption in the short run in the long run however the unidirectional causality chain runs from energy consumption and economic growth to co 2 emissions we also suggest some crucial policy implications depending on these results

prohibition and the market for illegal drugs over the past 25 years in the united states enforcement of drug prohibition has expanded dramatically over the same period however the trends in drug production and consumption have been essentially flat and the real purityadjusted prices of both cocaine and heroin have more than halved this combination of facts raises questions about the effectiveness of prohibition enforcement and it constitutes a puzzle that is interesting to explain in this paper the authors document these facts and explore possible explanations they do not claim to provide a complete answer but shed light on which explanations are likely to be important

the econometrics of piecewise linear budget constraints a survey and exposition of the maximum likelihood method in this article maximum likelihood techniques for estimating consumer demand functions when budget constraints are piecewise linear are exposited and surveyed consumer demand functions are formally derived under such constraints and it is shown that the functions are themselves nonlinear as a result the econometric problems in estimating such functions are exposited and the importance of the stochastic specification is stressed in particular the specification of both unobserved heterogeneity of preferences and measurement error econometric issues in estimation and testing are discussed and the results of the studies that have been conducted to date are surveyed

are there increasing returns to pollution abatement empirical analytics of the environmental kuznets curve in pesticides abstract according to the environmental kuznets curve ekc hypothesis economic growth and the reduction of environmental degradation are compatible goals an inverted u shaped relationship between economic performance and environmental pollution suggests that empirically an economy is associated with smaller levels of pollution after some threshold income point one potential explanation for the empirical evidence of an ekc is increasing returns to pollution abatement where the abatement efficiency rises with an increase in the scale of abatement doubling the clean up efforts more than doubles the abatement of pollution as this efficiency gain makes abatement less expensive pollution might fall as more abatement is undertaken this study tests the hypothesis that there are increasing returns to abating pollution empirical evidence on environmental risks in the us agricultural sector since 1970 support the existence of increasing returns in addition i estimate the productivity of pollution abatement using refined empirical productivity measurement methods and explicitly control the level of technology the results show the importance of including an environmental productivity variable in the ekc framework

the economic case against drug prohibition this paper discusses the costs and benefits of drug prohibition it offers a detailed outline of the economic consequences of drug prohibition and a systematic analysis of the relevant empirical evidence the bottom line is that a relatively free market in drugs is likely to be vastly superior to the current policy of prohibition

paradoxical effects of drug policy in a model with imperfect competition and switching costs this paper presents a stylized model of the market for hard drugs we assume that there is imperfect competition that the demand side is dominated by addicts and that the presence of switching costs leads to consumer loyalty drug policies affect the values of the parameters of the model including the degree of consumer loyalty and the static price elasticity of demand taking into account these effects it is shown that tough policies may lead to an increase in the marketing activities by suppliers and cause a long run increase in the number of addicts and total consumption

economic growth energy consumption financial development international trade and co2 emissions in indonesia this study examines the linkages among economic growth energy consumption financial development trade openness and co2 emissions over the period of 1975q1 2011q4 in the case of indonesia the stationary analysis is performed by using zivot andrews structural break unit root test and the ardl bounds testing approach for a long run relationship between the series in the presence of structural breaks the causal relation between the concerned variable is examined by the vecm granger causality technique and robustness of causal analysis is tested by innovative accounting approach iaa our results confirm that the variables are cointegrated it means that the long run relationship exists in the presence of structural break stemming in the series the empirical findings indicate that economic growth and energy consumption increases co2 emissions while financial development and trade openness compact it the vecm causality analysis has shown the feedback hypothesis between energy consumption and co2 emissions economic growth and co2 emissions are also interrelated i e bidirectional causality financial development granger causes co2 emissions the study opens up a new policy insights to control the environment from degradation by using energy efficient technologies financial development and trade openness can also play their role in improving the environmental quality

causality between income and emission a country group specific econometric analysis abstract empirical studies of the environmental kuznets curve ekc examine the presence or otherwise of an inverted u shaped relationship between the level of pollution and the level of income customarily in the diagram of ekc the level of income is shown on the horizontal axis and that of pollution on the vertical axis thus it is presumed that the relationship between income and pollution is one of unidirectional causality with income causing environmental changes and not vice versa the validity of this presumption is now being questioned it is being asserted that the nature and direction of causality may vary from one country to the other in this paper we present the results of a study of income co 2 emission causality based on a granger causality test to cross country panel data on per capita income and the corresponding per capita co 2 emission data briefly our results indicate three different types of causality relationship holding for different country groups for the developed country groups of north america and western europe and also for eastern europe the causality is found to run from emission to income for the country groups of central and south america oceania and japan causality from income to emission is obtained finally for the country groups of asia and africa the causality is found to be bi directional the regression equations estimated as part of the granger causality test further suggest that for the country groups of north america and western europe the growth rate of emission has become stationary around a zero mean and a shock in the growth rate of emission tends to generate a corresponding shock in the growth rate of income in contrast for the country groups of central and south america oceania and japan a shock in the income growth rate is likely to result in a corresponding shock in the growth rate of emission finally causality being bi directional for the country groups of asia and africa the income and the emission growth rates seemed to reinforce each other

room for improvement in low carbon economies of g7 and brics countries based on the analysis of energy efficiency and environmental kuznets curves abstract carbon emissions which are nowadays targeted for significant reduction cause global warming with climate change producing a series of side effects including economic losses and ecological extinction the data envelopment analysis approach has recently been employed for environmental estimations the target of this study is to introduce a new data envelopment analysis method in order to provide environmental improvement suggestions this study measures the room for improvements in low carbon economies of g7 group and brics group based on the analysis of energy efficiency and environmental kuznets curves the main findings are as follows i the g7 group has greater room for improvement in its carbonization value than the brics group before 2005 however the latter has greater room for improvement in carbonization value than the former after 2005 ii countries with the backfire effect of a high carbon economy include germany italy and south africa iii during the data period three environmental kuznets curves including energy intensity emission intensity and carbonization value do not satisfy the environmental kuznets curve hypothesis that the curves are inverted u shaped on the contrary the three environmental kuznets curves in this study are u shaped

carbon dioxide emissions and global gdp abstract a positive relationship between carbon dioxide emissions the most important greenhouse gas ghg implicated in global warming and gdp is shown in this paper examining per capita income and co2 emissions of 137 countries across 21 years it also appears that as per capita incomes accelerate across countries emissions increases for the most part tend to decelerate it could be that higher income levels lead to increased demand for environmental protection only emissions reduction proposals that assure incomes will not be adversely affected particularly those of less developed countries ldcs will have any possibility of successful implementation

the dynamic impact of renewable energy consumption on co2 emissions a revisited environmental kuznets curve approach this paper considers a revisited environmental kuznets curve ekc hypothesis with potential impact of renewable energy consumption on environmental quality to this end paper aims at investigating the validity of the ekc hypothesis employing the dependent variable of co2 emissions and regressors of gdp quadratic gdp and renewable energy consumption this paper hence analyzes this revisited ekc hypothesis to observe if i there exists an inverted u shaped relationship between environmental quality in terms of co2 emissions per capita income and per capita income squared and ii there exists a negative causality from renewables to co2 emissions within ekc model paper employs a panel data set of 17 oecd countries over the period 1977 2010 and launches panel fmols and panel dols estimations the findings support the ekc hypothesis for the panel and indicate that gdp per capita and gdp per capita squared have the impacts on co2 emissions positively and negatively respectively and that renewable energy consumption yields negative impact on co2 emissions another remark of this paper is that the validity of ekc does not depend on income level of individual countries of panel in which ekc hypothesis holds eventually paper argues that if countries carry out i policies i e for fair and easy access to the electricity from renewable sources and ii policies to increase renewables supply through i e improved renewable energy technologies they will be able to contribute to combating global warming problem as they increase their gdp s

ghg emissions gdp growth and the kyoto protocol a revisit of environmental kuznets curve hypothesis abstract the kyoto protocol attempts through political negotiations to guide participating industrialized countries greenhouse gas ghg emissions from a positive growing trend to reach a peak point or turning point and then be reduced to a negative growth that means the relationship between decreasing ghg emissions and economic growth may be described by an inverted u curve or called a bell shaped curve which is consistent with the concept of the environmental kuznets curve ekc hypothesis this research observed that the economic development and ghg emissions in economies in transition eits exhibit a hockey stick curve trend or called quasi l shape curve that also generates a lot of hot air which is significant to the implementation of the kyoto protocol in addition through the analysis of single country time series data and gdp data this research demonstrated that statistical data for most of the annex ii countries do not possess evidence that supports the ekc hypothesis for ghg emissions the results from this study also indicated that the 38 industrialized countries are unable to meet their targets under the kyoto protocol within the specified time period which are probably caused by the econometric method s inability to predict accurately the extents and development of innovative technologies and clean development mechanism cdm projects if the international community truly wants to reduce the ghg emissions the effectiveness of the existing international framework for emissions reduction needs to be reconsidered seriously and the global cooperation mechanism also needs to be greatly enhanced

energy efficiency economics and policy energy efficiency and conservation are major factors in the reduction of the environmental impact of the energy sector particularly with regard to climate change energy efficiency also contributes to reducing external dependence and vulnerabilities in the energy domain in this paper we discuss the factors that influence energy efficiency and conservation decisions and the most appropriate policies for their promotion although not all public policies seem justified we argue that specific policies for promoting energy conservation may be required preferably based on economic instruments or on the provision of information to consumers

causal relationship between energy consumption and gdp growth revisited a dynamic panel data approach abstract this paper uses the panel data of energy consumption and gdp for 82 countries from 1972 to 2002 based on the income levels defined by the world bank the data are divided into four categories low income group lower middle income group upper middle income group and high income group we employ the gmm sys approach for the estimation of the panel var model in each of the four groups afterwards the causal relationship between energy consumption and economic growth is tested and ascertained we discover a in the low income group there exists no causal relationship between energy consumption and economic growth b in the middle income groups lower and upper middle income groups economic growth leads energy consumption positively c in the high income group countries economic growth leads energy consumption negatively after further in depth analysis of energy related data the results indicate that in the high income group there is a great environmental improvement as a result of more efficient energy use and reduction in the release of co2 however in the upper middle income group countries after the energy crisis the energy efficiency declines and the release of co2 rises since there is no evidence indicating that energy consumption leads economic growth in any of the four income groups a stronger energy conservation policy should be pursued in all countries

income and emission a panel data based cointegration analysis this paper presents the results of an investigation of the causality issue of incomeemission relationship based on time series econometric techniques of unit root test cointegration and related error correction model for a panel data set here the nature of causality between per capita co2 emission pcco2 and per capita gdp pcgdp has been examined using a cross country panel data set covering 88 countries for the period 1960 90 using the panel unit root test procedure of im et al 1997 ips we have found that the hypothesis of unit root i e non stationarity of the time series of pcgdp and pcco2 can not be rejected for individual country groups as both the variables are found to follow i 1 process we next have performed the panel data co integration test and finally we have estimated the ecm for these country groups for which significant income emission cointegration was obtained to explore the nature of dynamics implicit in the given panel data set our findings suggest that there is more or less a bi directional causal relationship between income pcgdp and co2 emission pcco2 for africa central america america as a whole eastern europe western europe europe as a whole and the world as a whole that means the movement of the one variable directly affects the other variable through a feedback system thus the policy makers should be cautious to make proper decision about the control of emission level

using the environmental kuznets curve to evaluate energy policy some practical considerations abstract the environmental kuznets curve ekc is a widely applied empirical model that is used to assess the effect of country s increased income on its emissions such as co 2 typical estimation is of a reduced form model relating per capita emissions to per capita gdp and sometimes to energy consumption with an eye toward determining whether a country s per capita emissions increase or decrease with per capita gdp in this article we consider a number of practical issues in estimating and using the ekc for energy policy analysis proper estimation procedures should be used if the empirical work is to provide valid estimates of the ekc s shape in addition policymakers should proceed with caution when crafting policy on the basis of reduced form estimates of the ekc because the reduced form model provides limited insight into the policy implications of the relationship between income energy consumption and emissions

the nature of co2 emission kuznets curve this paper reveals that co2 emission kuznets curve merely reflects the peak theory of energy intensity the situation of real energy use should be used as a fundamental stone for both energy and environmental policy making

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

labour market experience in female wage equations does the experience measure matter many studies have found estimated female wage and labour supply equations to be sensitive in some way to labour market experience although different studies yield different results and it seems there is still more to know about this key human capital variable this is especially so when separate information on individual womes s labour market experience is not available making it necessary to construct some measure of experience from other information this paper takes four such measures of labour market experience and investigates the effects of these upon the coefficients from an estimated wage equation as heckman s 1976 1979 two stage probit selection model is still widely used to test and correct for censoring bias the effect of different measures of experience upon the results from this procedure is also investigated

towards an integrated framework for development and environment policy the dynamics of environmental kuznets curves abstract environmental kuznets curves ekcs have recently received considerable attention in development and environment policy but little is known on how the interaction between ecological and economic factors may result in an ekc or other qualitatively different outcomes we introduce a restricted class of vector valued differential equations for representing the evolution of socioeconomic and environmental variables which influence or are influenced by the process of economic development our model includes not only the complete path of each variable over time but also the highly critical interactions among multiple variables we demonstrate analytically and numerically that among a multiplicity of possible outcomes an inverted u pattern can only be obtained under specific circumstances and requires attention to the multiple factors which form the economic environmental system rather than a single dominant one

the econometrics of nonlinear budget sets traditional empirical analysis of consumer demand has usually made the assumption of linear budget sets that is the consumer is assumed to purchase any desired quantity at a constant price subject to a budget constraint the major exception to this framework is the analysis of demand when some goods are rationed 2 in the rationed case the price is constant up to a quantity limit in contrast to the rationed case here i consider the situation where the price varies with the amount of the good purchased empirical situations with nonconstant prices come readily to mind and of course they have received much recent attention from theorists since mirrlees 44 paper on optimal nonlinear taxation the following examples are meant to give a partial listing of cases when nonlinear budget sets occur i electricity prices many electric utilities engage in declining block pricing that is the marginal price of successive kwh s of electricity decrease at a given number of points determined by total demand thus the budget set is piecewise linear houthakker 36 was the first to propose an approach to this problem taylor 51 analyzes the problem at length and hausman kinnucin and mcfadden 31 use an instrumental variables estimator to provide consistent estimates of the demand function

analysing gasoline demand elasticities a survey this paper is a survey of studies on gasoline demand although there are very many dxerent studies in this eld which sometimes appear to arrive at contradictory results we find that with proper stratification of studies by model and data type much of the contict turns to consensus in this survey we classtfy studies by data type and by ten d erent categories of model and with the exception of estimates on seasonal data which tend to be unstable and of certain inappropriate model formulations we find a fair degree of agreement concerning average short run and even long run income and price elasticities

empirical study on the environmental kuznets curve for co2 in france the role of nuclear energy this paper attempts to estimate the environmental kuznets curve ekc in the case of france by taking the role of nuclear energy in electricity production into account we adopt the autoregressive distributed lag ardl approach to cointegration as the estimation method additionally we examine the stability of the estimated models and investigate the granger causality relationships between the variables in the system the results from our estimation provide evidence supporting the ekc hypothesis and the estimated models are shown to be stable over the sample period the uni direction running from other variables to co2 emissions are confirmed from the casualty tests specifically the uni directional causality relationship running from nuclear energy to co2 emissions statistically provides evidence on the important role of nuclear energy in reducing co2 emissions

entrepreneurial police and drug enforcement policy the hypothesis that drug enforcement is relatively high in local jurisdictions where state laws dictate that police retain seized assets is tested in the context of a reduced form equation of the supply and demand for drug enforcement the results are robust across model specifications some of which directly control for the level of drug use legislation permitting police to keep seized assets raises drug arrests as a portion of total arrests by about 20 percent and drug arrest rates by about 18 percent police bureaucrats apparently desire discretionary budget increases and they have considerable discretion in determining resource allocation

air quality and economic growth an empirical study abstract in the present empirical study we have observed an inverse and sometimes u shaped relationship between environmental degradation and per capita real income as opposed to the inverted u shaped environmental kuznets curve ekc found in many earlier studies it was felt that a possible explanation of the observed pattern of relationship might be sought in the dynamics of the process of economic growth experienced by the countries concerned thus e g economic development may strengthen the market mechanism as a result of which the economy may gradually shift from non market to marketed energy resources that are less polluting this phenomenon may show up in the form of an inverse relationship as mentioned above also due to the global technical progress the production techniques available to the countries all over the world are becoming more and more capital intensive and at the same time less polluting this may mean that given the income level the pollution level decreases as the capital intensity of an economy rises in the present study it is indeed observed that as capital intensity increases the level of suspended particulate matter spm in the atmosphere decreases per capita real income is also found to be inversely related to spm partially but the interaction effect of per capita income and capital intensity on spm is observed to be positive this suggests that given the level of per capita income capital intensity a more capital intensive production technique a higher per capita income level would cause less pollution for spm a surprising result is also obtained i e a u turn is observed at a very high level of per capita real income i e us 12 500 at 1985 us prices this is possibly indicative of the fact that there are technological limits to industrial pollution control such that beyond a threshold level of income further rise in income cannot be achieved without environmental degradation

is property crime caused by drug use or by drug enforcement policy the relationships among drug offenses prorperty crime and the allocation of police resources are investigated in a structural model using data from florida countries law enforcement resources are scarce and as efforts to combat drug crime increase the amount of these resources allocated to property crime is reduced this reallocation of police resources results in reduced deterrence for property crime and as a result an increase in these crimes the evidence presented suggests that rising property crimes in florida are at least partially the result of drug enforcement policy

foreign trade and declining pollution in sweden a decomposition analysis of long term structural and technological effects this article examines whether there exists any causal relationship between foreign trade and declining pollution in developed countries in other words do developed countries outsource their problems to less developed countries rather than solve them the case study is the swedish economy and the two environmental indicators employed are energy consumption and co2 emissions no causal relationships are found since sweden has long been a net exporter of embodied energy and co2 and continues to be so after 1970 when energy consumption stabilizes and co2 emissions decline in addition the ratios of net exported energy and co2 to total consumption remain stable which means there were no effects on the energy intensity or co2 intensity either these results suggest that internal forces like efficiency improvements changed consumption patterns and transformation of the energy system have been crucial for relative environmental improvement in sweden while foreign trade has played no role

threshold cointegration and nonlinear adjustment between co2 and income the environmental kuznets curve in spain 1857 2007 abstract article history received 9 march 2011received in revised form 24 february 2012accepted 2 march 2012available online 14 march 2012jel classi cation c2q4keywords environmental kuznets curveco 2 emissionsnonlinear relationshipthreshold cointegration inthispaper wemodelthe long run relationship between per capita co 2 and per capita income for the spanisheconomy over the period 1857 2007 according to the environmental kuznets curve eck the relationshipbetween the two variables has an inverted u shape however previous studies for the spanish economy onlyconsidered the existence of linear relationships such an approach may lack exibility to detect the trueshape of the relationship our empirical methodology accounts for a possible non linear relationship throughthe use of threshold cointegration techniques our results con rm the non linearity of the link between thetwo above mentioned variables pointing to the existence of an environmental kuznets curve for the spanishcase 2012 elsevier b v all rights reserved

endangering the war on terror by the war on drugs the united states is currently engaged in two wars one of which is less than a decade old the other has lasted over a century the first the war on terror against islamist fundamentalists began with al qaeda s destruction of the world trade centre s twin towers on sept 11 2001 this led to the us invasion of afghanistan the defeat of the taliban and the dislocation of al qaeda s terrorist infrastructure with osama bin laden and his deputy al zawahari having to flee to the lawless badlands between pakistan and afghanistan with the creation of a democratically elected government under ahmad karzai it might have been thought that the war on terror in afghanistan had been won but as the taliban cum al qaeda scorpion had been squashed but not killed it is now remerging with the resurgence of the taliban and its continuing support for the refurbished al qaeda terrorist network in the southern provinces particularly in helmand of afghanistan this area also happens to be the major poppy growing area in afghanistan for conversion into opium and heroin in 2007 it provided 92 of the world s opium supply whose farm gate value was us 1 billion 1 it is this opium economy which is now as in the past providing the taliban with the money for arms and growing control over the southern opium growing provinces by offering farmers protection from the opium eradication programs spearheaded by the us as part of its war on drugs the first part of this paper

china s regional co2 emissions characteristics inter regional transfer and emission reduction policies abstract this paper analyzes the characteristics of china s regional co 2 emissions and effects of economic growth and energy intensity using panel data from 1997 to 2009 the results show that there are remarkable regional disparities among eastern central and western areas regional elasticities of per capita gdp and energy intensity on co 2 emissions which reflect the regional differences in economic development economy structure and restraining function of energy intensity decrease on the emission energy intensity reducing is more effective to emission abatement for provinces with higher elasticity of energy intensity but may not be significant for provinces with lower elasticity the inverse distribution of energy production and consumption regional unfairness caused by institutional factors like energy price and tax system result in inter regional co 2 emission transfer embodied in the power transmission the calculation indicates that the embodied emission transfer was gradually significant after 2003 from eastern area to the central and western areas especially energy production provinces in central area which leads to distortion on the emission and emission intensity the regional emission reduction targets and supporting policies should be customized and consistent with the actual situations rather than setting the same target for all the provinces

an ekc pattern in historical perspective carbon dioxide emissions technology fuel prices and growth in sweden 1870 1997 the environmental kuznets curve ekc has been subject to research and debate since the early 1990s this articleexamines the inverted u trajectory of swedish co2 emissions during an extended time

drugs economics and policy drug ii let the market work there is no necessary link between drug consumption addiction and social disintegration empirical evidence suggests that a considerable share of the population has consumed illegal drugs during some period of their lives a substantial proportion of drug users have a job and home many mature out of drug consumption in their thirties most drug users are normal consumers responding systematically to relative prices after the failure of a repressive drugs policy switzerland allows cities to pursue a third way between repression and liberalization the state allows carefully screened heavy addicts to inject heroin at a nominal price while at the same time raising the cost to potential entrants the experiment has produced encouraging results the health of heroin users has improved and crime has been reduced a homogenized drugs policy in the european union would probably disallow such promising programmes bruno s frey

an analysis of economic warfare in times of conflict an adversary s resources are a source of potential harm many geopolitical tactics are thus quite explicitly economic as they seek either to deter an adversary s worst intentions or reduce its capacity to inflict damage richardson 1960 tullock 1974 relevant policies include trade limiting sanctions galtung 1967 pape 1997 and direct attacks on an adver sary s military infrastructure or personnel 1 this paper explores a third example namely efforts to undermine an adversary s source of income i focus on us efforts to reduce the resources of taliban loyal insurgents by suppressing the afghan opium trade with additional applications to conflicts involving oil producing nations the taliban historically profited from the opium trade through a 10 percent tax on farmers known locally as ushr and by providing traffickers with protection services this link between opium income and taliban resources coupled with concerns about a narcoticsinsecurity cycle motivates the view that the united states should suppress the afghan opium trade blanchard 2009 caution is warranted

the demand for alcohol the differential response to price although several studies indicate that drinking is responsive to price little work has focused on whether prices have a differential effect on light moderate or heavy drinking this study examines the price responsiveness of the demand for alcohol whether heavy drinkers are less sensitive to price than light or moderate drinkers the study uses data on alcohol consumption on the 1983 national health interview survey the results indicate that both light and heavy drinkers are much less price elastic than moderate drinkers further we cannot reject the hypothesis that the very heaviest drinkers have perfectly price inelastic demands

energy consumption income and carbon emissions in the united states abstract this paper investigates the effect of energy consumption and output on carbon emissions in the united states earlier research focused on testing the existence and or shape of an environmental kuznets curve without taking energy consumption into account we investigate the granger causality relationship between income energy consumption and carbon emissions including labor and gross fixed capital formation in the model we find that income does not granger cause carbon emissions in the us in the long run but energy use does hence income growth by itself may not become a solution to environmental problems

non parametric frontier approach to modelling the relationships among population gdp energy consumption and co2 emissions abstract in this paper a non parametric approach based in data envelopment analysis dea is proposed as an alternative to the kaya identity a k a impact this frontier method identifies and extends existing best practices population and gdp are considered as input and output respectively both primary energy consumption and greenhouse gas ghg emissions are considered as undesirable outputs several linear programming models are formulated with different aims namely a determine efficiency levels b estimate maximum gdp compatible with given levels of population energy intensity and carbonization intensity and c estimate the minimum level of ghg emissions compatible with given levels of population gdp energy intensity or carbonization index the united states of america case is used as illustration of the proposed approach