is it possible to improve environmental quality without reducing economic growth evidence from the qatar economy abstract in line with the priorities of the qatar national vision qnv 2030 and its principal pillars we examine in this paper the energy use economic growth nexus for qatar during the period 1970 2014 using recent development in both unit roots and ardl bounds testing approach with structural breaks we found strong evidence for the growth hypothesis this result indicates that the qatari policymakers should recognize that energy conservation policies will have adverse effects on economic growth and therefore alternative means must be undertaken to preserve the environment this paper presents and discusses a detailed economic energy and environmental policies that can help qatari policymakers in achieving the objective of balance between economic growth and environment quality

economic growth and pollutant emissions in tunisia an empirical analysis of the environmental kuznets curve abstract this paper investigates the relationship between economic growth and pollutant emissions for a small and open developing country tunisia during the period 1961 2004 the investigation is made on the basis of the environmental kuznets curve hypothesis using time series data and cointegration analysis carbon dioxide co 2 and sulfur dioxide so 2 are used as the environmental indicators and gdp as the economic indicator our results show that there is a long run cointegrating relationship between the per capita emissions of two pollutants and the per capita gdp an inverted u relationship between so 2 emissions and gdp has been found with income turning point approximately equals to 1200 constant 2000 prices or to 3700 in ppp constant 2000 prices however a monotonically increasing relationship with gdp is found more appropriate for co 2 emissions furthermore the causality results show that the relationship between income and pollution in tunisia is one of unidirectional causality with income causing environmental changes and not vice versa both in the short run and long run this implies that an emission reduction policies and more investment in pollution abatement expense will not hurt economic growth it could be a feasible policy tool for tunisia to achieve its sustainable growth in the long run

bitcoin for energy commodities before and after the december 2013 crash diversifier hedge or safe haven abstractwe study the relationship between bitcoin and commodities by assessing the ability of bitcoin to act as a diversifier hedge or safe haven against daily movements in commodities in general and energy commodities in particular we focus on energy commodities because energy in the form of electricity is an essential input in the bitcoin production for the entire period results show that bitcoin is a strong hedge and a safe haven against movements in both commodity indices we further examine whether that ability is also present for non energy commodities and our analysis show insignificant results when energy commodities are excluded from the general commodity index we also account for the december 2013 bitcoin price crash and our results reveal that bitcoin hedge and safe haven properties against commodities and energy commodities are only present in the pre crash period whereas in the post crash period bitcoin is no more than a diversifier in addition to uncovering the time varying role o

environmental kuznets curve hypothesis in pakistan cointegration and granger causality abstract the paper is an effort to fill the gap in the energy literature with a comprehensive country study of pakistan we investigate the relationship between co2 emissions energy consumption economic growth and trade openness in pakistan over the period of 1971 2009 bounds test for cointegration and granger causality approach are employed for the empirical analysis the result suggests that there exists a long run relationship among the variables and the environmental kuznets curve ekc hypothesis is supported the significant existence of ekc shows the country s effort to condense co2 emissions and indicates certain achievement of controlling environmental degradation in pakistan furthermore we find a one way causal relationship running from economic growth to co2 emissions energy consumption increases co2 emissions both in the short and long runs trade openness reduces co2 emissions in the long run but it is insignificant in the short run in addition the change of co2 emissions from short run to the long span of time is corrected by about 10 yearly

energy consumption and economic growth new insights into the cointegration relationship abstract this paper examines the long run relationship between energy consumption and real gdp including energy prices for 25 oecd countries from 1981 to 2007 the distinction between common factors and idiosyncratic components using principal component analysis allows to distinguish between developments on an international and a national level as drivers of the long run relationship indeed cointegration between the common components of the underlying variables indicates that international developments dominate the long run relationship between energy consumption and real gdp furthermore the results suggest that energy consumption is price inelastic causality tests indicate the presence of a bi directional causal relationship between energy consumption and economic growth

evaluating interval forecasts a complete theory for evaluating interval forecasts has not been worked out to date most of the literature implicitly assumes homoskedastic errors even when this is clearly violated and proceed by merely testing for correct unconditional coverage consequently i set out to build a consistent framework for conditional interval forecast evaluation which is crucial when higher order moment dynamics are present the new methodology is demonstrated in an application to the exchange rate forecasting procedures advocated in risk management

renewable and non renewable energy use economic growth nexus the case of mena net oil importing countries abstract this study examines the energy use economic growth nexus by disaggregating energy use into two types of energy renewable and non renewable energy use our sample consists of eleven mena net oil importing countries noics during the period 1980 2012 a multivariate panel framework was used to estimate the long run relationship and the panel granger causality tests was employed to assess the causality direction among variables the empirical results provide evidence for long term equilibrium relationship between real gross domestic product gdp renewable energy use non renewable energy use real gross fixed capital formation and labor force the results provide evidence also for positive and statistically significant elasticities moreover the empirical findings from panel error correction model confirm the existence of bidirectional causality between renewable energy use and economic growth and between non renewable energy use and economic growth results that support the feedback hypothesis moreover our empirical findings provide evidence for two way bidirectional causal association in both the short and long run between renewable and non renewable energy use which proves the substitutability and interdependence between these two types of energy sources the policies implications of these results are also proposed and discussed

evaluating natural resource investments notwithstanding impressive advances in the theory of finance over the past 2 decades practical procedures for capital budgeting have evolved only slowly the standard technique which has remained unchanged in essentials since it was originally proposed see dean 1951 bierman and smidt 1960 derives from a simple adaptation of the fisher 1907 model of valuation under certainty under this technique expected cash flows from an investment project are discounted at a rate deemed appropriate to their risk and the resulting present value is compared with the cost of the project this standard textbook technique reflects modern theoretical developments only insofar as estimates of the discount rate may be obtained from crude application of single period asset pricing theory but see brennan 1973 bogue and roll 1974 turnbull 1977 constantinides 1978 the inadequacy of this approach to capital budgeting is widely acknowledged although not widely discussed its obvious deficiency is its the evaluation of mining and other natural resource projects is made particularly difficult by the high degree of uncertainty attaching to output prices it is shown that the techniques of continuous time arbitrage and stochastic control theory may be used not only to value such projects but also to determine the optimal policies for developing managing and abandoning them the approach may be adapted to a wide variety of contexts outside the natural resource sector where uncertainty about future project revenues is a paramount concern

volatility estimation for bitcoin a comparison of garch models we explore the optimal conditional heteroskedasticity model with regards to goodness of fit to bitcoin price data it is found that the best model is the ar cgarch model highlighting the significance of including both a short run and a long run component of the conditional variance

financial development and environmental quality in uae cointegration with structural breaks abstract this study extends the recent work of shahbaz et al 2014 by implementing recent unit root tests with multiple structural breaks and regime switching cointegration techniques considering for one and two unknown regime shifts to investigate the relationship between carbon dioxide emissions electricity consumption economic growth financial development trade openness and urbanization for the uae over the period spanning from 1975 to 2011 our results confirm the existence of environmental kuznets curve ekc moreover we find an inverted u shaped relationship between financial development and co2 emissions we also find that electricity consumption urbanization and trade openness contribute to improve environmental quality

outliers and garch models in financial data abstract we propose to extend the additive outlier ao identification procedure developed by franses and ghijsels franses p h ghijsels h 1999 additive outliers garch and forecasting volatility international journal of forecasting 15 1 9 to take into account the innovative outliers ios in a garch model we apply it to three daily stock market indexes and examine the effects of outliers on the diagnostics of normality

value at risk and expected shortfall in cryptocurrencies portfolio a vine copula based approach risk management is an important and helpful process for investors hedge funds traders and market makers one of its key points is the appropriate estimation of risk measures which can improve the

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

natural gas consumption and economic growth nexus panel data analysis for gcc countries abstract this study investigates the relationship between natural gas energy consumption and economic growth by including trade openness total labor force and gross fixed capital formation as a major determinants of gdp growth within the multivariate framework model in gulf cooperation council gcc countries a panel gdp model is constructed taking the period of 1980 2012 the result revealed that natural gas energy consumption is cointegrated with gdp growth in the investigated countries in addition based on the panel dynamic ordinary least square dols and the fully modified ordinary least square fmols this study concluded that the natural gas energy consumption affects the gcc s countries gdp growth positively in the long run furthermore the results from the granger causality test revealed bidirectional causality between natural gas energy consumption and gdp growth which confirms the feedback hypothesis from the outcome of this research a number of policy implications were provided for the gcc countries

regime switching effect of financial development on energy intensity evidence from markov switching vector error correction model abstract studies that deal with financial development and energy intensity usually show the single effect of one variable on another or the causality running between them during the whole sample period but this study is an attempt to explore the regime switching effect of financial development on energy intensity in different periods within the sample using yearly data from 1972 to 2017 in case of bangladesh a markov switching vector error correction model is applied to carry out the study and the results reveal a two regime switching nature of the effect of financial development on energy intensity financial development plays a stimulating role in regime 1 where it plays an inhibiting role in regime 2 to influence energy intensity the duration of regime 1 is longer than that of regime 2 specifying that the promoting effect of financial development on energy intensity is more enduring than the inhibiting effect in bangladesh the results have important policy implications to formulate energy policy and to maintain a balance between financial development and energy intensity in bangladesh and other emerging nations

valuation of projects for power generation with renewable energy a comparative study based on real regulatory options abstract this comparative study evaluates an investment project on renewable energy based on wind power we have conducted the study in three european union countries denmark finland and portugal we have modelled the main uncertainties that affect this kind of project such as the cost and production of electric power investment costs and consumer price index for each of these countries we have analysed the mechanisms of public support for wind energy we have identified the real options included in the regulatory frameworks of these three countries and assessed how they affect the expanded net present value of the project to this end we have used two different methods of option valuation the monte carlo method and the binomial method we have proved that the obtained results using both methods are quite similar finally we have evaluated the public incentives for wind energy offered in each of these three countries and concluded that in economic terms finland is the country with the strongest support for this kind of energy followed by denmark and in the last place portugal

the impact of energy consumption and economic development on ecological footprint and co2 emissions evidence from a markov switching equilibrium correction model abstract reducing the impact of air pollution and global environmental degradation on human health and quality of life for qatari citizens represents the most important objective of the qatar national vision 2030 with respect to this vision this study investigates the effects of economic growth energy consumption trade openness urbanization and financial development on environmental degradation by using the markov switching equilibrium correction model with shifts in both the intercept and income per capita slope for the period 1970 2015 unlike existing studies and in addition to the co 2 emissions pollutant this paper uses the total ecological footprint and ecological carbon footprint as new proxies of environmental degradation empirical results show strong evidence for cointegration with markov shifts in particular our results show that the non control for breaks can hide the true relationship among variables the results show also that when controlling for breaks the environment kuznets curve ekc hypothesis holds for the co 2 emissions and ecological carbon footprint pollutants and the u shaped behavior holds for the total ecological footprint moreover the results show that these two behaviors ekc and u shaped are regime dependent regarding the other explanatory variables the results show that trade openness and urbanization worsen ecological footprint however the electricity consumption and financial development are positively related to the ecological footprint and negatively related to ecological carbon footprint and co 2 emissions finally we found evidence for the growth hypothesis for both pollutants based on these results a detailed economic energy and environmental policy is proposed and discussed for the case of qatar

can cryptocurrencies be a safe haven a tail risk perspective analysis abstractcryptocurrencies are one of the most promising financial innovations of the last decade different from major stock indices and the commodities of gold and crude oil the cryptocurrencies e

analysis of south korea s economic growth carbon dioxide emission and energy consumption using the markov switching model abstract recently many countries have been making an effort to reduce their carbon dioxide co2 emission and as part of such effort the united nations framework convention on climate change unfccc adopted the kyoto protocol in 1997 south korea is very likely to be included in the second batch of countries that must reduce their greenhouse gas emission after the end of the implementation of the kyoto protocol in 2012 reducing the country s co2 emission however can have an impact on the economy therefore in this study the correlations between south korea s economic growth co2 emission and energy consumption were analyzed the analysis period was from q1 1991 to q4 2011 and the analysis methods that were used were regression analysis for the relational analysis among the various overall indices and the markov switching model for a more detailed analysis the results of the analyses showed that south korea s economic growth and co2 emission were coincidental the correlation analysis of the country s economic growth and energy consumption showed a significant correlation between economic growth and fossil fuels which emit co2 such as coal in the industrial sector petroleum products in the industrial and transportation sectors and liquefied natural gas lng in the residential commercial and industrial sectors it is expected that the results of this study will pave the way for the conduct of various researches on controlling the country s co2 emission management and for suggestions for such to be given such as policies for reducing the energy consumption in each sector using the methodology proposed in this study

return and volatility spillovers among cryptocurrencies abstract this paper measures interdependencies among 18 major cryptocurrencies and shows that i bitcoin is the dominant contributor of return and volatility spillovers among all the sampled cryptocurrencies ii return and volatility spillovers have risen steadily over time iii there are spikes in spillovers during major news events regarding cryptocurrencies these findings suggest growing interdependence among cryptocurrencies and by extension a higher degree of contagion risk it may be the case that cryptocurrencies are becoming more integrated albeit this makes for interesting future empirical testing in addition the time varying nature of spillovers reveals a certain dimension of uncertainty regarding the future of these digital currencies

volatility and return jumps in bitcoin abstract in this article we are interested in understanding the dynamics of bitcoin daily returns and volatility cryptocurrencies have very high unconditional volatility and are subject to sudden massive price swings we start with a standard log normal stochastic volatility model then explore two formulations which incorporate discontinuous jumps to volatility and returns jumps to volatility are permanent while jumps to mean returns have contemporaneous effects only results point to two high volatility periods the first from late 2013 to early 2014 likely associated to the mt gox incident the second covers the year of 2017 peaking on december likely driven by increased popular attention jumps to mean returns are specially relevant to capture large price variations mostly negative associated with formative events in cryptocurrency markets such as hacks and unsuccessful fork attempts

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

the impact of economic development and social political factors on ecological footprint a panel data analysis for 15 mena countries abstract this paper extends the work of al mulali and ozturk 2015 1 by re investigating the environment kuznets curve ekc hypothesis for 15 mena middle east and north african countries using the ecological footprint ef as a proxy of environmental degradation over the period 1975 2007 unlike the existing studies we augment the basic ekc relationship by considering life expectancy at birth fertility rate and political institutional index variables as new possible determinants of environmental degradation the estimation of this relationship has been conducted for all mena 15 countries for oil exporting and non oil exporting countries sub samples the results show that energy use worsens ecological footprint whereas real gdp per capita exhibits an inverted u shaped relationship with ef in oil exporting countries and in the sample as a whole i e the ekc hypothesis is validated for the non oil exporting countries the relationship between ef and economic growth is u shaped moreover our findings show that socio demographic variables such as urbanization life expectancy at birth and fertility rate improve the environment in the long term we also found that the improvement of political institutions in those countries has not been accompanied by a reduction of environmental stress the granger causality results support evidence of the existence of an error correction mechanism between the ef real gdp energy use and the fertility rate specifically in the short term we found strong evidence for bidirectional causality among the ecological real gdp and energy use variables

financial development environmental quality trade and economic growth what causes what in mena countries this paper examines the relationship between financial development co2 emissions trade and economic growth using simultaneous equation panel data models for a panel of 12 mena countries over the period 1990 2011 our results indicate that there is evidence of bidirectional causality between co2 emissions and economic growth economic growth and trade openness are interrelated i e bidirectional causality feedback hypothesis is validated between trade openness and financial development neutrality hypothesis is identified between co2 emissions and financial development unidirectional causality running from financial development to economic growth and from trade openness to co2 emissions is identified our empirical results also verified the existence of environmental kuznets curve these empirical insights are of particular interest to policymakers as they help build sound economic policies to sustain economic development and to improve the environmental quality

a real options evaluation model for the diffusion prospects of new renewable power generation technologies this study presents a policy planning model that integrates learning curve information on renewable power generation technologies into a dynamic programming formulation featuring real options analysis the model recursively evaluates a set of investment alternatives on a year by year basis thereby taking into account that the flexibility to delay an irreversible investment expenditure can profoundly affect the diffusion prospects of renewable power generation technologies price uncertainty is introduced through stochastic processes for the average wholesale price of electricity and for input fuel prices demand for electricity is assumed to be increasingly price sensitive as the electricity market deregulation proceeds reflecting new options of consumers to react to electricity price changes such as time of use pricing unbundled electricity services and choice of supplier the empirical analysis is based on data for the turkish electricity supply industry apart from general implications for policy making it provides some interesting insights about the impact of uncertainty and technical change on the diffusion of various emerging renewable energy technologies

portfolio optimization in the presence of dependent financial returns with long memory a copula based approach abstract in this paper we seek to examine the effect of the presence of long memory on the dependence structure between financial returns and on portfolio optimization first we focus on the dependence structure using copulas to select the best copula in addition to the goodness of fit tests we employ a graphical method based on visual comparison of the fitted copula density and the smoothed copula density estimated by wavelets moreover we check the stability of the copula parameter the empirical results show that the long memory affects the dependence structure second we analyze the impact of this dependence structure on the optimal portfolio we propose a new approach based on minimizing the conditional value at risk and assuming that the dependence structure is modeled by the copula parameter the empirical results show that our approach outperforms the traditional minimizing variance approach where the dependence structure is represented by the linear correlation coefficient

applying real options analysis to assess cleaner energy development strategies abstract the energy industry accounts for the largest portion of co 2 emissions is facing the issue of compliance with the national clean energy policy the methodology for evaluating the energy mix policy is crucial because of the characteristics of lead time embedded with the power generation facilities investment and the uncertainty of future electricity demand in this paper a modified binomial model based on sequential compound options which may account for the lead time and uncertainty as a whole is established and a numerical example on evaluating the optional strategies and the strategic value of the cleaner energy policy is also presented it is found that the optimal decision at some nodes in the binomial tree is path dependent which is different from the standard sequential compound option model with lead time or time lag concept the proposed modified binomial sequential compound real options model can be generalized and extensively applied to solve the general decision problems that deal with the long lead time of many government policies as well as capital intensive investments

the effect of urbanization on co2 emissions in emerging economies the theories of ecological modernization and urban environmental transition both recognize that urbanization can have positive and negative impacts on the natural environment with the net effect being hard to determine a priori this study uses recently developed panel regression techniques that allow for heterogeneous slope coefficients and cross section dependence to model the impact that urbanization has on co2 emissions for a panel of emerging economies the estimated contemporaneous coefficients on the energy intensity and affluence variables are positive statistically significant and fairly similar across different estimation techniques by comparison the estimated contemporaneous coefficient on the urbanization variable is sensitive to the estimation technique in most specifications the estimated coefficient on the urbanization variable is positive but statistically insignificant the implications of these results for sustainable development policy 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

an application of extreme value theory to cryptocurrencies we study the tail behaviour of the returns of five major cryptocurrencies by employing an extreme value analysis and estimating value at risk and expected shortfall as tail risk measures we find that bitcoin cash is the riskiest while bitcoin and litecoin are the least risky cryptocurrencies

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

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

does urbanization lead to less energy use and lower co2 emissions a cross country analysis despite the relationship between urbanization energy use and co2 emissions has been extensively studied in recent years little attention has been paid to differences in development stages or income levels most previous studies have implicitly assumed that the impact of urbanization is homogenous for all countries this assumption can be questionable as there are many characteristic differences among countries of different levels of affluence this paper investigates empirically the effects of urbanization on energy use and co2 emissions with consideration of the different development stages using the stochastic impacts by regression on population affluence and technology stirpat model and a balanced panel dataset of 99 countries over the period 1975 2005 the findings suggest that the impact of urbanization on energy use and emissions varies across the stages of development surprisingly urbanization decreases energy use in the low income group while it increases energy use in the middle and high income groups the impact of urbanization on emissions is positive for all the income groups but it is more pronounced in the middle income group than in the other income groups these novel findings not only help advance the existing literature but also can be of special interest to policy makers and urban planners

panel estimation for co2 emissions energy consumption economic growth trade openness and urbanization of newly industrialized countries abstract this paper empirically examines the dynamic causal relationships between carbon dioxide emissions energy consumption economic growth trade openness and urbanization for the panel of newly industrialized countries nic using the time series data for the period 1971 2007 using four different panel unit root tests it is found that all panel variables are integrated of order 1 from the johansen fisher panel cointegration test it is found that there is a cointegration vector among the variables the granger causality test results support that there is no evidence of long run causal relationship but there is unidirectional short run causal relationship from economic growth and trade openness to carbon dioxide emissions from economic growth to energy consumption from trade openness to economic growth from urbanization to economic growth and from trade openness to urbanization it is found that the long run elasticity of carbon dioxide emissions with respect to energy consumption 1 2189 is higher than short run elasticity of 0 5984 this indicates that over time higher energy consumption in the newly industrialized countries gives rise to more carbon dioxide emissions as a result our environment will be polluted more but in respect of economic growth trade openness and urbanization the environmental quality is found to be normal good in the long run

modelling the treatment effect of renewable energy policies on economic growth evaluation from mena countries abstract this paper investigates the effects of renewable energy re policies on economic growth in mena countries using the propensity score matching methodology our empirical analysis conducted on a sample of 24 economies 17 re and 7 non re countries from 1980 to 2012 shows that the treatment effect of re policies has a significant and positive impact on stimulating and promoting economic growth in mena economies that have implemented these energy policies re policies alone however are not sufficient this change requires the collective long term commitment of all stakeholders including governments citizens financiers private companies and international agencies this would help impede policy overlaps and incoherence as well as consequently improve the overall policy effectiveness

can the regulated market help foster a free market for wind energy in brazil abstract wind energy has been negotiated in brazil s regulated market through auctions organized by the government bilateral negotiations in the free market have been scarce in 2011 wind farms were allowed to bid in a minus 5 a 5 auctions for energy with first delivery date 5 years ahead this new design was expected to stimulate negotiations in the free market as the 20 year contract in the regulated market eases financing while the 5 year grace period grants wind farms the option to sell whatever energy is generated beforehand in the free market we modeled bidders price decision in a 5 auctions as real options and concluded that given the low prices averaging usd 50 mw h winners are tempted to defer investment expecting more favorable equipment and energy prices or a better knowledge of the wind site construction is likely to begin in 2 3 years with little time left for the free market bidders that consider the option of eventually abandoning the project are more price competitive increasing chances that some wind farms will never materialize therefore this attempt to foster the free market may not pay off and moreover it may have the unfavorable effect of turning brazil s energy expansion planning a more difficult task

estimating garch volatility in the presence of outliers garch volatilities depend on the unconditional variance which is a non linear function of the parameters consequently they can have larger biases than estimated parameters using robust methods to estimate both parameters and volatilities is shown to outperform maximum likelihood procedures

the long run and causal analysis of energy growth openness and financial development on carbon emissions in turkey abstract the aim of this paper is to examine the causal relationship between financial development trade economic growth energy consumption and carbon emissions in turkey for the 1960 2007 period the bounds f test for cointegration test yields evidence of a long run relationship between per capita carbon emissions per capita energy consumption per capita real income the square of per capita real income openness and financial development the results show that an increase in foreign trade to gdp ratio results an increase in per capita carbon emissions and financial development variable has no significant effect on per capita carbon emissions in the long run these results also support the validity of ekc hypothesis in the turkish economy it means that the level of co 2 emissions initially increases with income until it reaches its stabilization point then it declines in turkey in addition the paper explores causal relationship between the variables by using error correction based granger causality models

co2 emissions energy consumption economic and population growth in malaysia abstract this study investigates the dynamic impacts of gdp growth energy consumption and population growth on co2 emissions using econometric approaches for malaysia empirical results from ardl bounds testing approach show that over the period of 1970 1980 per capita co2 emissions decreased with increasing per capita gdp economic growth however from 1980 to 2009 per capita co2 emissions increased sharply with a further increase of per capita gdp this is also supported by the dynamic ordinary least squared dols and the sasabuchi lind mehlum u slm u test tests consequently the hypothesis of the ekc is not valid in malaysia during the study period the results also demonstrate that both per capita energy consumption and per capita gdp has a long term positive impacts with per capita carbon emissions but population growth rate has no significant impacts on per capita co2 emission however the study suggests that in the long run economic growth may have an adverse effect on the co2 emissions in malaysia thus significant transformation of low carbon technologies such as renewable energy and energy efficiency could contribute to reduce the emissions and sustain the long run economic growth

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

is beta t egarch 1 1 superior to garch 1 1 statistical performance in sample point forecast precision and out of sample density forecast precision of garch 1 1 and beta t egarch 1 1 models are compared we study the volatility of nine gl

wind power generation an impact analysis of incentive strategies for cleaner energy provision in brazil brazil has adopted various strategies to encourage alternative renewable energy sources in pursuit of cleaner and sustainable energy production to this end strategies should support the reduction of the financial risk for potential investors in the renewable energy market therefore this study aims to analyze the impact of incentive strategies on the financial risk of wind power generation projects in brazil in different marketing environments from a quantitative approach using monte carlo simulation in three scenarios we evaluate the impact of funding from the national development bank and participation in the clean development mechanism in the financial returns of the investor in a regulated contracting environment and free contracting environment measured by the net present value we conduct a statistical analysis to find out if there were statistically significant differences in investor risk in each scenario the main results of the study are as follows the wind speed the selling price of energy and disbursement for the investment have the most significant impact on the financial return the project viability probability is greater than 85 in all scenarios regardless of the marketing environment the regulated market is less risky for the producer than the free market since there is a statistically significant difference in net present value variances for all scenarios in the regulated contracting environment funding is critical to reducing risk and carbon credit trading is not a suitable policy for providing financial security to renewable energy producers thus we conclude that in brazil the contracting of projects from auctions in the regulated contracting environment with the support of the national development bank has been important for neutralizing the producer s financial risks

robust portfolio optimization with copulas abstract conditional value at risk cvar is widely used in portfolio optimization as a measure of risk cvar is clearly dependent on the underlying probability distribution of the portfolio we show how copulas can be introduced to any problem that involves distributions and how they can provide solutions for the modeling of the portfolio we use this to provide the copula formulation of the cvar of a portfolio given the critical dependence of cvar on the underlying distribution we use a robust framework to extend our approach to worst case cvar wcvar wcvar is achieved through the use of rival copulas these rival copulas have the advantage of exploiting a variety of dependence structures symmetric and not we compare our model against two other models gaussian cvar and worst case markowitz our empirical analysis shows that wcvar can asses the risk more adequately than the two competitive models during periods of crisis

renewable non renewable energy consumption economic growth trade openness and ecological footprint evidence from organisation for economic co operation and development countries the purpose of this study is to examine the validity of environmental kuznets curve hypothesis for ecological footprint with the role of renewable energy use non renewable energy use and trade openness in 24 organisation for economic co operation and development countries for this purpose we investigate the period from 1980 to 2014 using with second generation panel data methodologies which allow to cross sectional dependence among countries the group mean results show that the inverted u shaped environmental kuznets curve hypothesis does not hold in organisation for economic co operation and development countries because we found the u shaped relationship between economic growth and ecological footprint in addition it is concluded that increasing renewable energy consumption reduces ecological footprint and increasing non renewable energy consumption increases environmental degradation

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

is there an environmental kuznets curve for sulfur abstract most existing estimates of the environmental kuznets curve ekc for sulfur which use samples of mainly high income countries indicate a maximum emissions turning point at middle to lower high income levels of gdp per capita we use a larger and more globally representative sample than previous sulfur ekc studies we find that sulfur emissions per capita are a monotonic function of income per capita when we use a global sample and an inverted u shape function of income when we use a sample of high income countries a model estimated in first differences results in a monotonic ekc when estimated with both high income and global samples reductions in emissions are time related rather than income related

energy consumption economic growth and carbon emissions challenges faced by an eu candidate member abstract this paper investigates the long run granger causality relationship between economic growth carbon dioxide emissions and energy consumption in turkey controlling for gross fixed capital formation and labor the most interesting result is that carbon emissions seem to granger cause energy consumption but the reverse is not true the lack of a long run causal link between income and emissions may be implying that to reduce carbon emissions turkey does not have to forgo economic growth

environmental kuznets curve time series application for turkey why controversial results exist for similar models abstract this paper investigates the environmental kuznets curve ekc hypothesis using 40 year spanned time series for the turkey case co 2 emission series representing environmental pressure and gdp per capita values representing economic development are used for the period 1968 2007 a cointegration has been determined among nonstationary series first phases of an inverted u form ekc relationship have been determined for turkey from the econometric estimations this result is conflicting with that of the similar models for turkey case on the other hand this conflict refers the important arguments in the literature and constitutes the main points of the paper sensitivity critiques for example ahking et al for cointegration tests johansen and engle granger tests have been supported in our study moreover we detected important diversion in results according to drift and trend assumptions both in ci vector and ekc model specifications we conclude that building ekc model according to cointegration ci equation restrictions can be important source for diversion when sensitivity exists in estimations and cointegration tests therefore ekc estimations should be held in non restrictive way the additional structural reasons have been also discussed for developing country ekc cases the most important one is that the narrow income sample of developing countries makes it possible to be defined by similar but different paths therefore policy implications to be drawn from those analyses should not ignore this feature of developing country analyses

is bitcoin a hedge a safe haven or a diversifier for oil price movements a comparison with gold abstract this study assesses the roles of bitcoin as a hedge a safe haven and or a diversifier against extreme oil price movements in comparison to the corresponding roles of gold we use a quantile on quantile regression approach to capture the dependence structure between the considered market returns under different bitcoin market conditions while considering nuances of oil price movements compared to gold our findings show that both bitcoin and gold would serve the roles of a hedge a safe haven and a diversifier for oil price movements however this property seems to be sensitive to the bitcoin s and gold s different bear normal or bull market conditions and to whether the oil price is in a downside normal or upside regime by controlling for new and relevant u s and global uncertainty indicators we confirm that both bitcoin and gold but not oil are assets where investors may park their cash during times of political and economic turmoil the conditional value at risk covar approach to risk management is then conducted providing robust evidence of the usefulness of each of the bitcoin and gold in expanded oil portfolios in terms of diversification opportunities and downside risk reductions

caviar conditional autoregressive value at risk by regression quantiles value at risk var has become the standard measure of market risk employed by financial institutions for both internal and regulatory purposes var is defined as the value that a portfolio will lose with a given probability over a certain time horizon usually one or ten days despite its conceptual simplicity its measurement is a very challenging statistical problem and none of the methodologies developed so far give satisfactory solutions interpreting the var as the quantile of future portfolio values conditional on current information we propose a new approach to quantile estimation which does not require any of the extreme assumptions invoked by existing methodologies such as normality or i i d returns the conditional autoregressive value at risk or caviar model moves the focus of attention from the distribution of returns directly to the behavior of the quantile we specify the evolution of the quantile over time using a special type of autoregressive process and use the regression quantile framework introduced by koenker and bassett to determine the unknown parameters since the objective function is not differentiable we use a differential evolutionary genetic algorithm for the numerical optimization utilizing the criterion that each period the probability of exceeding the var must be independent of all the past information we introduce a new test of model adequacy the dynamic quantile test applications to simulated and real data provide empirical support to this methodology and illustrate the ability of these algorithms to adapt to new risk environments

energy consumption and economic growth in central america evidence from a panel cointegration and error correction model abstract this study examines the relationship between energy consumption and economic growth for six central american countries over the period 1980 2004 within a multivariate framework given the relatively short span of the time series data a panel cointegration and error correction model is employed to infer the causal relationship based on the heterogeneous panel cointegration test by pedroni pedroni p 1999 critical values for cointegration tests in heterogeneous panels with multiple regressors oxford bulletin of economics and statistics 61 653 670 pedroni p 2004 panel cointegration asymptotic and finite sample properties of pooled time series tests with an application to the ppp hypothesis new results econometric theory 20 597 627 cointegration is present between real gdp energy consumption the labor force and real gross fixed capital formation with the respective coefficients positive and statistically significant the granger causality results indicate the presence of both short run and long run causality from energy consumption to economic growth which supports the growth hypothesis