renewable energy consumption urbanization financial development income and co2 emissions in turkey testing ekc hypothesis with structural breaks abstract in this study the short and long run dynamic relationship between per capita gdp per capita carbon dioxide co2 emissions financial development per capita total renewable energy consumption hydropower consumption alternative energy consumption and urbanization was investigated by using ardl bounds testing approach gregory hansen and hatemi j cointegration tests for turkey during 1974 2014 the results of three cointegration test indicated that there was a long run relationship between these variables the coefficients obtained from the ardl fully modified least squares fmols and canonical cointegrating regression ccr estimators showed that economic growth financial development and urbanization increase environmental degradation while total renewable energy consumption hydropower consumption and alternative energy consumption had no effect on co2 emissions the findings showed that economic growth caused the greatest increases in co2 emissions followed by urbanization and financial development however renewable energy consumption was not at a desirable level to reduce co2 emissions the study also support environmental kuznets curve ekc hypothesis which establishes an inverted u shaped relationship between economic growth and co2 emissions the turning points of per capita gdp obtained from long run regressions were found to be around 13523 14077 us dollars outside the sample period the overall results indicated that turkey has not reached the level of per capita gdp that can reduce environmental pollution and renewable energy consumption is not a solution to reduce co2 emissions

is there a turning point in the relationship between income and energy use and or carbon emissions abstract we analyze the effect of fuel mix model specification and the level of development on the presence and size of a turning point in the relationship between income and energy use and or carbon emissions the results indicate that fuel mix the specification for income and the level of economic development affect conclusions about whether there is a turning point in the relationship between economic activity and energy use and carbon emissions including fuel shares generally reduces the size of a turning point that is estimated from a panel that includes observations from both oecd and non oecd nations but this result varies according to the level of development for oecd nations there is limited support for a turning point in the relationship between income and per capita energy use and or carbon emissions for non oecd nations there is no turning point in the relationship between income and either energy use or carbon emissions instead the relationship is positive together the results indicate that forecasters and policy makers should not depend on a turning point in the relationship between income and energy use or carbon emissions to reduce either

energy efficiency and sustainable growth in industrial sectors in european union countries a nonlinear ardl approach abstract it can be said that economic growth providing it ensures a clean and safe environment is one of the main objectives of many countries with this in mind an important question needs to be asked what is the relationship between energy efficiency and economic growth this can only be answered through an empirical analysis by carrying out such an analysis using the energy efficiency of the industrial sector for 11 european union countries for a time span from 1997 to 2015 it should be possible to understand if the energy efficiency measures and investments being made are driving economies towards greater energy efficiency and sustainable growth this paper uses a nonlinear ardl model which allows short and long run relationships to be analysed for the ascending and descending movements of variables the results indicate that investment is increasing energy efficiency while at the same time reducing greenhouse gas emissions economic growth is driving economies to greater energy efficiency the same result is found in the industrial energy price index to verify robustness the environmental kuznets curve was estimated using gross domestic product per capita and as an alternative the industrial production index to ensure increased energy efficiency along with sustainable growth policymakers must adapt their policies and devise new ones to both incentivise investment and control energy pricing alternative ways of electricity generation such as renewable sources could allow the economy to grow in a more sustainable way such mechanisms would let policymakers develop policies for greener and more sustainable growth while at the same time encouraging the efficient use of energy

continuity and reversal in oil spot price movements abstract the hypothesis that prices follow a random walk is tested using daily data for 1978 1984 on the rotterdam spot gas oil market the method uses a filter test statistic to evaluate possible dependencies between successive price changes in the movement domain the results show a significant tendency for small price changes to persist but for reversal to be exhibited for larger price changes it is shown that this dependency can be exploited in a very profitable trading rule the hypothesis that the gas oil market is efficient is rejected this is attributed to the relative immaturity of oil spot markets

creating balance in dynamic competitions abstract we consider incentives for organizing competitions in multiple rounds focusing on situations where there is heterogeneity among the contestants ex ante which discourages effort in a single contest heterogeneity evolves across rounds depending upon the outcomes of previous rounds we present conditions under which balance in such a competition can be created by determining the number of rounds and dividing the prize fund carefully across them so that full rent dissipation entails in the model each round is an all pay auction where contestants differ in their abilities to gain a momentum from winning we also discuss the case when negative prizes are feasible demonstrating that this strengthens the full dissipation result and we consider a case where the size of the winner s momentum is related to the size of the prize attained showing that the stronger this linkage the less of the prize is awarded early on

an econometric study of co2 emissions energy consumption income and foreign trade in turkey abstract this study attempts to empirically examine the dynamic causal relationships between carbon emissions energy consumption income and foreign trade in the case of turkey using the time series data for the period 1960 2005 this research tests the interrelationship between the variables using the bounds testing to cointegration procedure the bounds test results indicate that there exist two forms of long run relationships between the variables in the case of first form of long run relationship carbon emissions are determined by energy consumption income and foreign trade in the case of second long run relationship income is determined by carbon emissions energy consumption and foreign trade an augmented form of granger causality analysis is conducted amongst the variables the long run relationship of co2 emissions energy consumption income and foreign trade equation is also checked for the parameter stability the empirical results suggest that income is the most significant variable in explaining the carbon emissions in turkey which is followed by energy consumption and foreign trade moreover there exists a stable carbon emissions function the results also provide important policy recommendations

the environmental kuznets curve in the oecd 1870 2014 carbon dioxide co2 emissions play an important role in global warming consequently studying the relationship between co2 emissions and economic development is important especially when viewed from a historical perspective we test the environmental kuznets curve ekc hypothesis for a panel of 20 oecd nations dating back to the first globalization boom in the nineteenth century utilising recently developed panel data estimators that account for cross sectional dependence and parameter heterogeneity for the period 1870 to 2014 we find support for the ekc hypothesis for the panel as a whole with three of our preferred four estimators with turning points in income per capita that lie between 18 955 and 89 540 in 1990 us country specific results however only provide mixed support for the ekc hypothesis specifically we find evidence of an ekc for nine of the 20 countries with five exhibiting a traditional inverted u shaped relationship three exhibiting an n shaped relationship and one an inverted n shaped relationship

the effects of environmental regulation and technical progress on co2 kuznets curve an evidence from china based on environmental kuznets curve theory a panel data model which takes environmental regulation and technical progress as its moderating factors was developed to analyse the institutional and technical factors that affect the path of low carbon economic development the results indicated that there was a co2 emission kuznets curve seen in china environmental regulation had a significant moderating effect on the curve and the inflection of co2 emissions could come substantially earlier under stricter environmental regulation meanwhile the impact of technical progress on the low carbon economic development path had a longer hysteresis effect but restrained co2 emission during its increasing stage and accelerated its downward trend during the decreasing stage which was conducive to emission reduction strict environmental regulation could force the high carbon emitting industries to transfer from the eastern regions to the central or the western regions of china which would make the co2 kuznets curve higher in its increasing stage and lower in its decreasing stage than that under looser regulation furthermore energy efficiency energy structure and industrial structure exerted a significant direct impact on co2 emissions we should consider the above factors as essential in the quest for low carbon economic development

effects of financial development economic growth and trade on electricity consumption evidence from post fukushima japan abstract this study examines the long run and short run effects of financial development economic growth export imports and capital on the japanese energy predicaments as a result of the foregoing energy crisis in the country to ensure a robust outcome the study applied the extended cobb douglas production function and used time series data from 1970 to 2012 following to this structural break unit root test ardl bounds test approach to cointegration and the johansen cointegration test were applied in addition the vecm granger causality framework was used in determining the causal relationship between the variables the findings of the study establish that in the long run a 1 rise in financial development economic growth exports and imports in japan will exert a significant pressure on the japanese electricity consumption by 0 2429 0 5040 0 0921 and 0 2193 respectively however capital was found to decline energy consumption in all material respect in the short run the study discovered how a 1 rise in the dynamics of financial development economic growth exports and imports to add to the japanese electricity predicaments by 0 2210 0 5840 0 0521 and 0 2031 respectively the existence of the feedback relationship between most of the variables was discovered while economic growth exports imports and trade openness were found to granger cause electricity consumption the study advocates the adoption of massive but competitive renewable energy system in japan how it should be done and why it should be done are carefully set by this study

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

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

the environmental kuznets curve economic growth renewable and non renewable energy and trade in tunisia we use the autoregressive distributed lag ardl b ounds testing approach for cointegration with structural breaks and the ve ctor error correction model vecm granger causality approach in order to investigate relationships between per capita co 2 emissions gdp renewable and non renewable energy consumption and international trade exports or imports for tunisia during the period 1980 2009 we show the existence of a short run unidirectional causality running from tra de gdp co 2 emission and non renewable energy to renewable energy our long run estimates show that non renewable energy and trade have a positive impact on co 2 emissions whereas renewable energy impacts weakly and negatively co 2 emission when using the model with exports and this impact is statistically insignificant when using the model wi th imports the inverted u shaped environmental kuznets curve ekc hypothesis is not supported graphically and analytically in the long run this means that tunisia has not ye t reached the required level of per capita gdp to get an inverted u shaped ekc our main policy recommendations for tunisia are the following i to radically reform the subsidies system granted b y the tunisian government for fossil fuels consumption ii to encourage the use of renewable energy and ener gy efficiency by reinforcing actual projects and regulatory frame work iii to locate ports near exporting industrial zones or vice versa to reduce emission of pollution caused by the transport of merchandise iv to elaborate a strategy for maximizing its benefit from renewable energy technology transfer occurring when importing capita l goods v to encourage the creation of renewable energy projects for export to the eu with a proportion of production for national consumption

revisiting the concept of environmental kuznets curve in period of energy disaster and deteriorating income empirical evidence from japan this study investigates the position of the japanese environmental kuznets curve in period of natural disaster and deteriorating income following the recent fukushima energy crisis the study aim to establish whether the ekc exist in period of energy disaster and deteriorating income to ensure this data from 1961 to 2012 was used while the zivot andrew structural break test the ardl bounds test were applied and these were validated using the innovation accounting test the finding of the study established the existence of inverted u shape suggesting the presence of ekc despite the deteriorating income of the country with the discovery of the existence of ekc in this study despite the dwindling productivity and revenue in japan this study challenged the ekc hypothesis and all existing studies on ekc by establishing that natural disasters are in themselves strong causative agents for the ekc to unfold and it is immaterial whether the economic fortunes of a country is increasing or decreasing the study further discovered energy consumption to be the major contributor of environmental degradation in japan while exports declines co2 emissions but imports adds to environmental degradation on the growth prospects of the japanese economy after the crisis the study discovered how energy consumption exports and imports contribute 33 55 1 027 and 7 126 to the country s economic growth respectively in return a minimum of 16 24 23 89 and 44 18 of co2 emissions was discovered the study proposed policy instruments that will help in realizing a balanced environment amidst efficient energy consumption and environmental management among others

investigation of the environmental kuznets curve for carbon emissions in malaysia do foreign direct investment and trade matter abstract environmental degradation has become a central issue of discussion among the economists and environmentalists in view of malaysia s position as one of the main contributors to co2 emissions in asia and its status as a fast growing economy it is vital therefore to conduct a study to identify the relationship between economic growth and co2 emissions for malaysia this study attempts to examine empirically the environmental kuznets curve hypothesis for malaysia in the presence of foreign direct investment and trade openness both in the short and long run for the period 1970 to 2008 the bounds testing approach and granger causality methodology are applied to test the interrelationships of the variables the results of our study indicate that the inverted u shaped relationship does exist between economic growth and co2 emission in both the short and long run for malaysia after controlling for two additional explanatory variables namely fdi and trade importantly the results of the study also provide some crucial policy recommendations to the policy makers

energy innovations ghg emissions nexus fresh empirical evidence from oecd countries abstract this study explores the impact of improvements in energy research development erd on greenhouse gas ghg emissions using environmental kuznets curve hypothesis for 28 oecd countries over the period of 1990 2014 in doing so we have employed a panel data where public budget in energy research development and demonstration erd d has transformed into a finite inverted v lag distribution model developed by de leeuw 1962 this model considers that energy innovation accumulates in time and presents empirical evidence how energy innovation contributes in reducing energy intensity and environmental pollution as well our results indicate that energy innovation measures require lapses of time to reach their full effect i e innovation applied to measures for environmental correction does not reach its whole effect immediately requiring instead a certain amount of time to pass innovation policies have recommended for improving environmental quality

impacts of renewable energy consumption on the german economic growth evidence from combined cointegration test abstract germany is the largest economy in europe and the leading renewable energy user comparable to none in the entire of the european continents it is in reference to these developments that this study investigates whether the impacts of renewable energy have consolidated the economic growth prospects of the country to ensure this quarterly time series data from 1971q1 to 2013qiv was used the study employed the clemente montanes reyes detrended structural break test the bayer hanck combined cointegration test and the ardl bounds testing approach to cointegration in addition the causality analysis was observed using vecm granger causality framework the results confirmed the existence of cointegration among the variables the results show that renewable energy consumption in germany consolidates the country s economic growth prospects to the extend that a 1 increase in renewable energy consumption boosts german economic growth by 0 2194 in addition to that a 1 increase in capital lead to the rise in economic growth by 1 1320 while a 0 5125 increase in economic growth is due to 1 increase in labor productivity the causality analysis on the other hand revealed the existence of feedback effect between renewable energy consumption and economic growth while the relationship between renewable energy consumption and capital is found to be bidirectional and same inference was found to exist between capital and economic growth the study proposes solid mechanisms that will help in averting renewable energy market failure locally and internationally among others

explaining the relationship between co2 emissions and national income the role of energy consumption i estimate a simultaneous equation system in which gdp and co2 emissions are jointly determined i find that including energy consumption in the regression implies a negative relationship between income and co2 emissions which is contrary to previous findings

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

natural gas consumption and economic growth nexus is the 10th malaysian plan attainable within the limits of its resource abstract the 10th malaysia plan 10mp is a strategic plan focused on attaining a level of economic growth that will enable the country to attain a developed nation status by 2020 as a result of this ambitious plan this paper aims to investigate empirically if the nexus between natural gas consumption exports capital and labour could provide a clue to the possibilities of reaching this target the study applied time series data from 1971 to 2012 and used dual structural break tests to ensure robust result the bayer hanck cointegration johansen cointegration and the ardl bounds tests were applied the findings of the study reveal that economic growth does not granger cause natural gas consumption in malaysia however the results show that capital and export contribute 29 18 and 41 46 to the country s gdp after 20 04 and 42 29 of natural gas consumption respectively also it suggests that natural gas consumption has an indirect effect to the malaysian economic growth wherewithal labour was on the other hand found to have a minimal contribution to gdp the study proposes the efficient exploitation of natural gas reserves of the country a concerted effort to develop the labour force and ensure a realistic time for the plan among others

does inequality affect environmental quality evidence from major japanese cities abstract this study investigates whether income inequality affects environmental degradation we use city level data in japan where local governments have limited authority and often use voluntary agreements with private firms we test the hypothesis that inequality weakens residents bargaining power over polluters and has a negative effect on environmental quality our results show that inequality negatively affected air quality in residential and commercial areas during the 1990s but not in industrial areas this evidence suggests that the inequality pollution relationship is not just a correlation but reflects a causal effect of residents bargaining power on environmental quality this implies that equal communities can pressure firms into accepting pollution prevention agreements

economic growth international trade and air pollution a decomposition analysis abstract this study analyzes the impact of economic growth and international trade on the level of air pollution this is done by the estimation of the structural equation model with two factors describing the structure of economic activity and air pollution intensity it is further assumed that there is causal link between these two factors and that they are influenced by per capita income international trade intensity and the freedom house index the estimation results suggest that in the developing countries analyzed both international trade and per capita income lead to changes in the structure of economic activity and as a consequence to the increase in air pollution in addition the estimation results suggest that the impact of economic growth on air pollution intensity varies between the developing and developed countries in the developing countries this impact occurs through the change of the structure of economic activity while in the developed countries this impact is mainly direct and occurs through the sum of the scale effect and income effect the positive sign of this impact suggests the dominance of the scale effect over the income effect

environment kuznets curve for co2 emissions a cointegration analysis for china abstract this study examines the long run relationship between carbon emissions and energy consumption income and foreign trade in the case of china by employing time series data of 1975 2005 in particular the study aims at testing whether environmental kuznets curve ekc relationship between co 2 emissions and per capita real gdp holds in the long run or not auto regressive distributed lag ardl methodology is employed for empirical analysis a quadratic relationship between income and co 2 emission has been found for the sample period supporting ekc relationship the results of granger causality tests indicate one way causality runs through economic growth to co 2 emissions the results of this study also indicate that the carbon emissions are mainly determined by income and energy consumption in the long run trade has a positive but statistically insignificant impact on co 2 emissions

altruism evolution and welfare economics henrich clearly presents the convincing evidence that the evolution of prosocial preferences altruism and altruistic punishment is both theoretically possible and empirically present in human populations henrich convinces us using only the most restrictive arguments if one goes beyond the assumptions of one gene one trait or recognizes the existence of social cognition caporael 1997 the case for the existence of prosocial behavior is overwhelming furthermore while henrich is probably correct in saying that large scale social cooperation is unique to the human species mounting evidence suggests that prosocial behavior is also present in such diverse non human species as lions meerkats fire ants and arabian babblers clutton brock 2002 so why is the reaction against the notion of pure altruism so strong in both economics and biology a likely reason is that it goes against the dominant cultural belief in progress through competition among individuals both evolutionary biology and political economy matured in victorian england where darwin s careful and cautious argument for evolution by natural selection was recast as survival of the fittest a metaphor which fit the dog eat dog world of commercial society rugged individualism is reflected in the gene based reductionism of biology as well as the agent based reductionism of welfare economics bergh and van den gowdy 2003 in his contribution henrich establishes the theoretical basis for cultural group selection based on large scale cooperation he shows that the existence of prosocial behavior cannot be explained by individual based characteristic alone such as kin selection reciprocal altruism or costly signaling this does not contradict darwinian natural selection which can operate on any statistically reliable pattern patterns of culture may vary widely in human societies based on the different kinds of cultural transmission including conformist transmission a short cut to reliable information prestige based transmission punishment of non conformists and normative conformity by which people want their behavior to match that of the group the interplay between these kinds of cultural transmission and the in

the environmental kuznets curve and the structural change hypothesis we provide a very simple macroeconomic investigation of the role that structural changes might play in generating inverted u shaped income pollution relationships differently from previous research which mainly focuses on empirical static or general equilibrium models we develop a standard balanced growth path bgp analysis we show that along the bgp equilibrium an inverted u shaped income pollution relationship may occur as a response to structural changes but whether this is the case or not it will crucially depend upon the magnitude of a production externality parameter moreover we show that the negative relationship between income and pollution can only be a transitory phenomenon and in the long run pollution will increase as income rises generating overall an n shaped pattern

system dynamics modelling and the environmental kuznets curve in ecuador 1980 2025 abstract is it possible for a country in the process of development to comply with the environmental kuznets curve ekc hypothesis in the medium term this is the question that inspired this study this paper is an extension of a previous study focused on economic development and co2 emissions in the coming years in ecuador robalino lopez et al submitted for publication the main goal of this paper is to analyze whether the ekc hypothesis holds within the period 1980 2025 under four different scenarios this paper uses co integration techniques stock and watson 2010 to test the existence of the ekc hypothesis in ecuador in the medium term using jaunky s 2011 specification our proposal goes a step further than previous contributions and intends to see under which conditions a country could approach the fulfilment of this hypothesis in the medium term results do not support the fulfilment of the ekc nevertheless our estimations show that ecuador could be on the way to achieving environmental stabilization in the near future if economic growth is combined with an increase in the use of renewable energies an improvement of the productive sectoral structure and the use of a more efficient fossil fuel technology

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 income and foreign trade a south african perspective abstract the effect of trade liberalisation on environmental conditions has yielded significant debate in the energy economics literature although research on the relationship between energy consumption emissions and economic growth is not new in south africa no study specifically addresses the role that south africa s foreign trade plays in this context a surprising fact given trade is one of the most important factors that can explain the environmental kuznets curve this study employs recent south african trade and energy data and modern econometric techniques to investigate this the main finding of interest in this paper is the existence of a long run relationship between environmental quality levels of per capita energy use and foreign trade in south africa as anticipated per capita energy use has a significant long run effect in raising the country s co 2 emission levels yet surprisingly higher levels of trade for the country act to reduce these emissions granger causality tests confirm the existence of a positive bidirectional relationship between per capita energy use and co 2 emissions whilst the study also finds positive bidirectional causality between trade and income per capita and between trade and per capita energy use it appears however that trade liberalisation in south africa has not contributed to a long run growth in pollution intensive activities nor higher emission levels

co2 emissions energy consumption and output in france abstract this paper examines the dynamic causal relationships between pollutant emissions energy consumption and output for france using cointegration and vector error correction modelling techniques we argue that these variables are strongly inter related and therefore their relationship must be examined using an integrated framework the results provide evidence for the existence of a fairly robust long run relationship between these variables for the period 1960 2000 the causality results support the argument that economic growth exerts a causal influence on growth of energy use and growth of pollution in the long run the results also point to a uni directional causality running from growth of energy use to output growth in the short run

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

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

the saving and investment nexus for china evidence from cointegration tests the saving and investment nexus as postulated by feldstein and horioka fh 1980 is revisited the saving investment correlation for china is estimated over the periods 1952 1998 and 1952 1994 the latter culminating in a period of fixed exchange rate regime amongst the key results it is found that saving and investment are correlated for china for both the period of the fixed exchange rate and the entire sample period with high saving investment correlation the results suggest that the chinese economy is in conformity with the fh hypothesis this is a valid outcome for in china capital mobility was fairly restricted over the 1952 1994 period as indicated by the relatively low foreign direct investment