Abstract
In this paper, we investigate the validity of the environmental Kuznets curve (henceforth, EKC) hypothesis for 8 OECD countries. To this aim, we decompose the per capita GDP series into its increases and decreases and consider only increases by excluding decreases from the model. Therefore, this method may enable us to test the EKC hypothesis more accurately, in accordance with the original theory. Following decomposition, we apply the fixed-effect regression model with Driscoll-Kraay standard errors, and the common correlated effects mean group (CCEMG) estimator. Empirical findings indicate that while the undecomposed model with undecomposed per capita GDP series supports the EKC hypothesis for 4 out of 8 countries, the decomposed model with decomposed per capita GDP series does not do so for any country. Hence, these mixed results reveal a need to employ different alternative techniques, such as the data transformation/decomposition applied in this study, for testing the EKC hypothesis.
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The datasets generated and analyzed during the current study are available in the World Bank Indicator, Materialflows.net, World Intellectual Property Organization repository, http://data.worldbank.org.
References
Adedoyin FF, Aloba AA, Bekun FV (2020a) An assessment of environmental sustainability corridor: the role of economic expansion and research and development in EU countries. Sci Total Environ 713(136726):136726
Adedoyin FF, Gumede MI, Bekun FV, Etokakpan MU, Balsalobre-Lorente D (2020b) Modelling coal rent, economic growth and CO2 emission: does regulatory quality matter in BRICS economies. Sci Total Environ 710(136284):136284
Adedoyin FF, Zakari A (2020) Energy consumption, economic expansion, and CO2 emission in the UK: the role of economics policy uncertainty. Sci Total Environ 738(140014):140014
Adedoyin FF, Nathaniel S, Adeleye N (2020c) Environ Sci Pollut Res Int 28:2835–2847
Ahmad M, Isik C, Jabeen G, Ali T, Ozturk I, Atchike DW (2020) Heterogeneous links among urban concentration, non-renewable energy use intensity, economic development, and environmental emissions across regional development levels. Sci Total Environ 765:144527
Ahmad M, Muslija A, Satrovic E (2021) Does economic prosperity lead to environmental sustainability in developing economies? Environmental Kuznets curve theory. Environ Sci Pollut Res. https://doi.org/10.1007/s11356-020-12276-9
Altinoz B, Apergis N, Aslan A (2020) Energy consumption, carbon dioxide emissions and economic growth: fresh evidence from panel quantile regressions. Energy Res Lett 1(3):17075
Alvarado R, Tillaguango B, López-Sánchez M, Ponce P, Işık C (2021) Heterogeneous impact of natural resources on income inequality: The role of the shadow economy and human capital index. Econ Anal Policy
Apergis N (2016) Environmental Kuznets curves: new evidence on both panel and country-level CO2 emissions. Energy Econ 54(C):263–271
Apergis N, Polemis M (2020) Decomposing supply shocks in the US electricity industry: evidence from a time-varying Bayesian panel vector autoregression model. J Energ Mark 13(3)
Ardakani MK, Seyedaliakbar SM (2019) Impact of energy consumption and economic growth on CO2 emission using multivariate regression. Energy Strat Rev 26:100428
Aslan A, Apergis N, Yildirim S (2014) Causality between energy consumption and GDP in the U.S.: evidence from wavelet analysis. Front Energy 8:1–8
Aslanidis N, Iranzo S (2009) Environment and development: is there a Kuznets curve for CO2 emissions? Appl Econ 41:803–810
Bilgili F, Kocak E, Bulut U (2016) The dynamic impact of renewable energy consumption on CO2 emissions: a revisited environmental Kuznets curve approach. Renew Sust Energ Rev 54(C):838–845
Breusch TS, Pagan AR (1980) The Lagrange multiplier test and its application to model specifications in econometrics. Rev Econ Stud 47(1):239–253
Chi-Liu W (2020). The relationship between primary energy consumption and real gross domestic product: evidence from major Asian countries, Sustainability (Forthcoming)
Cho CH, Chu YP, Yang HY (2013) An environment Kuznets curve for GHG emissions: a panel cointegration analysis. Energy Sources Part B 9:120–129
Chontanawat J (2019) Driving forces of energy-related CO2 emissions based on expanded IPAT decomposition analysis: evidence from ASEAN and four selected countries. Energies 12:764
Churchill SA, Inekwe J, Ivanovski K, Smyth R (2018) The environmental Kuznets curve in the OECD: 1870-2014. Energy Econ 75(C):389–399
Cole MA (2004) Trade, the pollution haven hypothesis and the environmental Kuznets curve: examining the linkages. Ecol Econ 48:71–81
Destek MA, Ulucak R, Dogan E (2018) Analyzing the environmental Kuznets curve for the EU countries: the role of ecological footprint. Environ Sci Pollut Res 25(29):29387–29396
Dijkgraaf E, Vollebergh HRJ (2001) A note on testing for environmental Kuznets curves with panel data. SSRN Electron J. https://doi.org/10.2139/ssrn.286692
Dogan E, Seker F (2016) The influence of real output, renewable and non-renewable energy, trade and financial development on carbon emissions in the top renewable energy countries. Renew Sust Energ Rev 60:1074–1085
Dogan E, Turkekul B (2016) CO2 emissions, real output, energy consumption, trade, urbanization and financial development: testing the EKC hypothesis for the USA. Environ Sci Pollut Res 23(2):1203–1213. https://doi.org/10.1007/s11356-015-5323-8
Dogan E, Ulucak R, Kocak E, Isik C (2020) The use of ecological footprint in estimating the environmental Kuznets curve hypothesis for BRICST by considering cross-section dependence and heterogeneity. Sci Total Environ 723:138063
Dogru T, Bulut U, Kocak E, Isik C, Suess C, Sirakaya-Turk E (2020) The nexus between tourism, economic growth, renewable energy consumption, and carbon dioxide emissions: contemporary evidence from OECD countries. Environ Sci Pollut Res:1–19
Erdogan S (2020) Analyzing the environmental Kuznets curve hypothesis: the role of disaggregated transport infrastructure investments. Sustain Cities Soc 61:102338
Galeotti M, Lanza A, Pauli F (2006) Reassessing the environmental Kuznets curve for CO2 emissions: a robustness exercise. Ecol Econ 57:152–163
Gozgor G (2017) Does trade matter for carbon emissions in OECD countries? Evidence from a new trade openness measure. Environ Sci Pollut Res 24(36):27813–27821
Grossman G, Krueger AB (1991) Environmental impacts of a North American free trade agreement; National Bureau of Economic Research. Working paper 3914. NBER, Cambridge
Guo J, Xu Y, Pu Z (2016) Urbanization and its effects on industrial pollutant emissions: An empirical study of a chinese case with the spatial panel model. Sustainability 8(8):812
Hoechle D (2007) Robust standard errors for panel regressions with cross-sectional dependence. Stata J, Stata Corp LP 7(3):281–312
Isik C, Ahmad M, Pata UK, Ongan S, Radulescu M, Adedoyin FF, Bayraktaroğlu E, Aydın S, Ongan A (2020) An evaluation of the tourism-ınduced environmental Kuznets curve (T-EKC) hypothesis: evidence from G7 countries. Sustainability 12(21):9150
Isik C, Dogru T, Turk ES (2018) A nexus of linear and non‐linear relationships between tourism demand, renewable energy consumption, and economic growth: Theory and evidence. Int J Tour Res 20(1):38–49
Isik C, Kasımatı E, Ongan S (2017) Analyzing the causalities between economic growth, financial development, international trade, tourism expenditure and/on the CO2 emissions in Greece. Energy Sources Part B 12(7):665–673
Isik C, Ongan S, Ozdemir D (2019a) Testing the EKC hypothesis for ten US states: an application of heterogeneous panel estimation method. Environ Sci Pollut Res 26(11):10846–10853
Isik C, Ongan S, Ozdemir D (2019b) The economic growth/development and environmental degradation: evidence from the US state-level EKC hypothesis. Environ Sci Pollut Res 26(30):30772–30781
Jebli MB, Youssef SB, Ozturk I (2016) Testing environmental Kuznets curve hypothesis: the role of renewable and non-renewable energy consumption and trade in OECD countries. Ecol Indic 60:824–831
Joshi P, Beck K (2018) Democracy and carbon dioxide emissions: assessing the interactions of political and economic freedom and the environmental Kuznets curve. Energy Res Soc Sci 39:46–54
Kuznets S (1955) Economic growth and income inequality. Am Econ Rev 45(1):1–28
Lau LS, Choong CK, Ng CF, Liew FM, Ching LS (2019) Is nuclear energy clean? Revisit of environmental Kuznets curve hypothesis in OECD countries. Econ Model 77(C):12–20
Liddle B, Messinis G (2015) Revisiting sulfur Kuznets curves with endogenous breaks modeling: substantial evidence of inverted-Us/Vs for individual OECD countries. Econ Model 49:278–285
Martinez-Alier J (1995) The environment as a luxury good or “too poor to be green”? Ecol Econ 13(1):1–10
Neagu O (2019) The link between economic complexity and carbon emissions in the European Union countries: a model based on the Environmental Kuznets Curve (EKC) approach. Sustainability 11(17):4753
Ng CF, Choong CK, Ching SL, Lau LS (2019) The impact of electricity production from renewable and non-renewable sources on CO2 emissions: evidence from OECD countries. Int J Bus Soc 20(1):365–382
Onater-Isberk E (2016) Environmental Kuznets curve under noncarbohydrate energy. Renew Sust Energ Rev 64(C):338–347
Ongan S, Isik C, Ozdemir D (2020) Economic growth and environmental degradation: evidence from the US case environmental Kuznets curve hypothesis with application of decomposition. J Environ Econ Policy:1–8. https://doi.org/10.1080/21606544.2020.1756419
Pesaran MH (2006) Estimation and inference in large heterogenous panels with multifactor error structure. Econometrica 74(4):967–1012
Pesaran MH (2007) A simple panel unit root test in the presence of cross-section dependence. J Appl Econ 22(2):265–312
Radetzki M (1992). Economic growth and environment, in International Trade and the Environment Ed. P Low, World Bank DP-159 (World Bank, Washington, DC),121 -136
Shahzad U, Radulescu M, Rahim S, Isik C, Yousaf Z, Ionescu SA (2021) Do environment-related policy instruments and technologies facilitate renewable energy generation? exploring the contextual evidence from developed economies. Energies 14(3):690. https://doi.org/10.3390/en14030690
Sohag K, Kalugina O, Samargandi N (2019) Re-visiting environmental Kuznets curve: role of scale, composite, and technology factors in OECD countries. Environ Sci Pollut Res 26(27):27726–27737
Stern DI, Common MS (2001) Is there an environmental Kuznets curve for sulfur? Econ Manag J Environ 41(2):162–178
Zhang J, Fan Z, Chen Y, Gao J, Kiu W (2020) Decomposition and decoupling analysis of carbon dioxide emissions from economic growth in the context of China and the ASEAN. Sci Total Environ 714:136649
Zafar MW, Saud S, Hou F (2019) The impact of globalization and financial development on environmental quality: evidence from selected countries in the Organization for Economic Co-operation and Development (OECD). Environ Sci Pollut Res 26(13):13246–13262
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Conceptualization, C.I., S.O., and D.O.; methodology, C.I., S.O., and D.O.; investigation, M.I. and A.O.; writing—original draft preparation, C.I., S.O., D.O., M.A., M.I., and A.O.; writing—review and editing, C.I., S.O., D.O., M.A., and M.I.; supervision, C.I. and S.O.; project administration, C.I.; funding acquisition, Anadolu University. All authors have read and agreed to the published version of the manuscript.
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Isik, C., Ongan, S., Ozdemir, D. et al. The increases and decreases of the environment Kuznets curve (EKC) for 8 OECD countries. Environ Sci Pollut Res 28, 28535–28543 (2021). https://doi.org/10.1007/s11356-021-12637-y
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DOI: https://doi.org/10.1007/s11356-021-12637-y
Keywords
- EKC hypothesis
- OECD countries
- Fixed-effect regression with Driscoll-Kraay
- CCEMG estimator
- Data decomposition


