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What drives carbon dioxide emissions in the long-run? Evidence from selected South Asian Countries

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  • Ahmed, Khalid
  • Rehman, Mujeeb Ur
  • Ozturk, Ilhan

Abstract

This study empirically investigates the relationship between CO2 emission and four of its potentially contributing factors (i.e., energy consumption, income, trade openness and population) using time series data from 1971 to 2013 on five selected economies of South Asia. After confirming that all the series are stationary using unit root test process, the study incorporates three different and advance panel cointegration tests i.e. Pedroni- Kao- and Johansen-Fisher-panel cointegration. All the panel cointegration tests confirm that all the variables cointegrated. The long-run association between the variables is checked using FMOLS-grouped and individual cross-section country in the panel. The FMOLS grouped results show that energy consumption, trade openness and population increases environmental degradation in the panel countries with exception of income which has negative impact and sounds the existence of Environmental Kuznet curve between income and emission. The innovative accounting approach using variance decomposition test and impulse response function is applied to examine the causality amongst the underlined vectors. The results show that there is bidirectional causality between energy consumption and trade openness and uni-directional causality running from energy consumption, trade openness and population to CO2 emission. The results enumerate that the energy consumption and population density will increase in long-run and foresee further environmental degradation in the region.

Suggested Citation

  • Ahmed, Khalid & Rehman, Mujeeb Ur & Ozturk, Ilhan, 2017. "What drives carbon dioxide emissions in the long-run? Evidence from selected South Asian Countries," Renewable and Sustainable Energy Reviews, Elsevier, vol. 70(C), pages 1142-1153.
  • Handle: RePEc:eee:rensus:v:70:y:2017:i:c:p:1142-1153
    DOI: 10.1016/j.rser.2016.12.018
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    1. Chang, Ching-Chih, 2010. "A multivariate causality test of carbon dioxide emissions, energy consumption and economic growth in China," Applied Energy, Elsevier, vol. 87(11), pages 3533-3537, November.
    2. Brock, William A. & Taylor, M. Scott, 2005. "Economic Growth and the Environment: A Review of Theory and Empirics," Handbook of Economic Growth, in: Philippe Aghion & Steven Durlauf (ed.), Handbook of Economic Growth, edition 1, volume 1, chapter 28, pages 1749-1821, Elsevier.
    3. Carbone, Jared C. & Helm, Carsten & Rutherford, Thomas F., 2009. "The case for international emission trade in the absence of cooperative climate policy," Journal of Environmental Economics and Management, Elsevier, vol. 58(3), pages 266-280, November.
    4. Ahmed, Khalid & Shahbaz, Muhammad & Kyophilavong, Phouphet, 2016. "Revisiting the emissions-energy-trade nexus: Evidence from the newly industrializing," MPRA Paper 68680, University Library of Munich, Germany, revised 05 Jan 2016.
    5. Muhammad Shahbaz & Smile Dube & Ilhan Ozturk & Abdul Jalil, 2015. "Testing the Environmental Kuznets Curve Hypothesis in Portugal," International Journal of Energy Economics and Policy, Econjournals, vol. 5(2), pages 475-481.
    6. Pedroni, Peter, 2004. "Panel Cointegration: Asymptotic And Finite Sample Properties Of Pooled Time Series Tests With An Application To The Ppp Hypothesis," Econometric Theory, Cambridge University Press, vol. 20(3), pages 597-625, June.
    7. Suri, Vivek & Chapman, Duane, 1998. "Economic growth, trade and energy: implications for the environmental Kuznets curve," Ecological Economics, Elsevier, vol. 25(2), pages 195-208, May.
    8. Grossman, G.M & Krueger, A.B., 1991. "Environmental Impacts of a North American Free Trade Agreement," Papers 158, Princeton, Woodrow Wilson School - Public and International Affairs.
    9. Qazi, Ahmer Qasim & Ahmed, Khalid & Mudassar, Muhammad, 2012. "Disaggregate energy consumption and industrial output in Pakistan: An empirical analysis," Economics Discussion Papers 2012-29, Kiel Institute for the World Economy (IfW Kiel).
    10. Ling, Chong Hui & Ahmed, Khalid & Muhamad, Rusnah binti & Shahbaz, Muhammad, 2015. "Decomposing the trade-environment nexus for Malaysia: What do the technique, scale, composition and comparative advantage effect indicate?," MPRA Paper 67165, University Library of Munich, Germany, revised 09 Oct 2015.
    11. Groen, Jan J J & Kleibergen, Frank, 2003. "Likelihood-Based Cointegration Analysis in Panels of Vector Error-Correction Models," Journal of Business & Economic Statistics, American Statistical Association, vol. 21(2), pages 295-318, April.
    12. Joakim Westerlund, 2007. "Testing for Error Correction in Panel Data," Oxford Bulletin of Economics and Statistics, Department of Economics, University of Oxford, vol. 69(6), pages 709-748, December.
    13. Gene M. Grossman & Alan B. Krueger, 1995. "Economic Growth and the Environment," The Quarterly Journal of Economics, Oxford University Press, vol. 110(2), pages 353-377.
    14. Markku Lanne & Henri Nyberg, 2016. "Generalized Forecast Error Variance Decomposition for Linear and Nonlinear Multivariate Models," Oxford Bulletin of Economics and Statistics, Department of Economics, University of Oxford, vol. 78(4), pages 595-603, August.
    15. Usama Al-Mulali & Ilhan Ozturk & Hooi Lean, 2015. "The influence of economic growth, urbanization, trade openness, financial development, and renewable energy on pollution in Europe," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 79(1), pages 621-644, October.
    16. Menyah, Kojo & Wolde-Rufael, Yemane, 2010. "Energy consumption, pollutant emissions and economic growth in South Africa," Energy Economics, Elsevier, vol. 32(6), pages 1374-1382, November.
    17. Sharif Hossain, Md., 2011. "Panel estimation for CO2 emissions, energy consumption, economic growth, trade openness and urbanization of newly industrialized countries," Energy Policy, Elsevier, vol. 39(11), pages 6991-6999.
    18. Al-Mulali, Usama & Ozturk, Ilhan, 2015. "The effect of energy consumption, urbanization, trade openness, industrial output, and the political stability on the environmental degradation in the MENA (Middle East and North African) region," Energy, Elsevier, vol. 84(C), pages 382-389.
    19. Kirsten S. Wiebe & Martin Bruckner & Stefan Giljum & Christian Lutz, 2012. "Calculating Energy-Related Co 2 Emissions Embodied In International Trade Using A Global Input--Output Model," Economic Systems Research, Taylor & Francis Journals, vol. 24(2), pages 113-139, November.
    20. Kao, Chihwa, 1999. "Spurious regression and residual-based tests for cointegration in panel data," Journal of Econometrics, Elsevier, vol. 90(1), pages 1-44, May.
    21. Ozturk, Ilhan & Acaravci, Ali, 2013. "The long-run and causal analysis of energy, growth, openness and financial development on carbon emissions in Turkey," Energy Economics, Elsevier, vol. 36(C), pages 262-267.
    22. Al-mulali, Usama & Tang, Chor Foon & Ozturk, Ilhan, 2015. "Estimating the Environment Kuznets Curve hypothesis: Evidence from Latin America and the Caribbean countries," Renewable and Sustainable Energy Reviews, Elsevier, vol. 50(C), pages 918-924.
    23. Ahmed, Khalid, 2015. "The sheer scale of China’s urban renewal and CO2 emissions: Multiple structural breaks, long-run relationship and short-run dynamics," MPRA Paper 71035, University Library of Munich, Germany.
    24. Rolf Larsson & Johan Lyhagen & Mickael Lothgren, 2001. "Likelihood-based cointegration tests in heterogeneous panels," Econometrics Journal, Royal Economic Society, vol. 4(1), pages 1-41.
    25. Peter Pedroni, 1999. "Critical Values for Cointegration Tests in Heterogeneous Panels with Multiple Regressors," Oxford Bulletin of Economics and Statistics, Department of Economics, University of Oxford, vol. 61(S1), pages 653-670, November.
    26. Ulltveit-Moe, Karen Helene & Forslid, Rikard & Okubo, Toshihiro, 2011. "Why are firms that export cleaner? International trade and CO2 emissions," CEPR Discussion Papers 8583, C.E.P.R. Discussion Papers.
    27. Martin Jänicke & Harald Mönch & Thomas Ranneberg & Udo Simonis, 1989. "Structural change and environmental impact," Intereconomics: Review of European Economic Policy, Springer;ZBW - Leibniz Information Centre for Economics;Centre for European Policy Studies (CEPS), vol. 24(1), pages 24-35, January.
    28. Maddala, G S & Wu, Shaowen, 1999. "A Comparative Study of Unit Root Tests with Panel Data and a New Simple Test," Oxford Bulletin of Economics and Statistics, Department of Economics, University of Oxford, vol. 61(0), pages 631-652, Special I.
    29. Akhmat, Ghulam & Zaman, Khalid & Shukui, Tan & Sajjad, Faiza, 2014. "Does energy consumption contribute to climate change? Evidence from major regions of the world," Renewable and Sustainable Energy Reviews, Elsevier, vol. 36(C), pages 123-134.
    30. James Cloyne, 2013. "Discretionary Tax Changes and the Macroeconomy: New Narrative Evidence from the United Kingdom," American Economic Review, American Economic Association, vol. 103(4), pages 1507-1528, June.
    31. Lopez Ramon, 1994. "The Environment as a Factor of Production: The Effects of Economic Growth and Trade Liberalization," Journal of Environmental Economics and Management, Elsevier, vol. 27(2), pages 163-184, September.
    32. Suzanne McCoskey & Chihwa Kao, 1998. "A residual-based test of the null of cointegration in panel data," Econometric Reviews, Taylor & Francis Journals, vol. 17(1), pages 57-84.
    33. Managi, Shunsuke & Hibiki, Akira & Tsurumi, Tetsuya, 2009. "Does trade openness improve environmental quality?," Journal of Environmental Economics and Management, Elsevier, vol. 58(3), pages 346-363, November.
    34. Shahbaz, Muhammad, 2012. "Does trade openness affect long run growth? Cointegration, causality and forecast error variance decomposition tests for Pakistan," Economic Modelling, Elsevier, vol. 29(6), pages 2325-2339.
    35. Shahbaz, Muhammad & Ozturk, Ilhan & Afza, Talat & Ali, Amjad, 2013. "Revisiting the environmental Kuznets curve in a global economy," Renewable and Sustainable Energy Reviews, Elsevier, vol. 25(C), pages 494-502.
    36. Aviral Tiwari & Muhammad Shahbaz, 2014. "Revisiting Purchasing Power Parity for India using threshold cointegration and nonlinear unit root test," Economic Change and Restructuring, Springer, vol. 47(2), pages 117-133, May.
    37. Hassan, Mohd Nor Azman & Jaramillo, Paulina & Griffin, W. Michael, 2011. "Life cycle GHG emissions from Malaysian oil palm bioenergy development: The impact on transportation sector's energy security," Energy Policy, Elsevier, vol. 39(5), pages 2615-2625, May.
    38. Jeffrey A. Frankel & Andrew K. Rose, 2005. "Is Trade Good or Bad for the Environment? Sorting Out the Causality," The Review of Economics and Statistics, MIT Press, vol. 87(1), pages 85-91, February.
    39. Ertugrul Yildirim & Alper Aslan & Ilhan Ozturk, 2014. "Energy Consumption And Gdp In Asean Countries: Bootstrap-Corrected Panel And Time Series Causality Tests," The Singapore Economic Review (SER), World Scientific Publishing Co. Pte. Ltd., vol. 59(02), pages 1-16.
    40. Edwards, Sebastian, 1992. "Trade orientation, distortions and growth in developing countries," Journal of Development Economics, Elsevier, vol. 39(1), pages 31-57, July.
    41. Hyun S Kim & Jungho Baek, 2011. "The Environmental Consequences of Economic Growth Revisited," Economics Bulletin, AccessEcon, vol. 31(2), pages 1198-1211.
    42. Ahmed, Khalid & Bhattacharya, Mita & Qazi, Ahmer Qasim & Long, Wei, 2016. "Energy consumption in China and underlying factors in a changing landscape: Empirical evidence since the reform period," Renewable and Sustainable Energy Reviews, Elsevier, vol. 58(C), pages 224-234.
    43. Shahbaz, Muhammad & Khraief, Naceur & Uddin, Gazi Salah & Ozturk, Ilhan, 2014. "Environmental Kuznets curve in an open economy: A bounds testing and causality analysis for Tunisia," Renewable and Sustainable Energy Reviews, Elsevier, vol. 34(C), pages 325-336.
    44. Kasman, Adnan & Duman, Yavuz Selman, 2015. "CO2 emissions, economic growth, energy consumption, trade and urbanization in new EU member and candidate countries: A panel data analysis," Economic Modelling, Elsevier, vol. 44(C), pages 97-103.
    45. Jalil, Abdul & Mahmud, Syed F., 2009. "Environment Kuznets curve for CO2 emissions: A cointegration analysis for China," Energy Policy, Elsevier, vol. 37(12), pages 5167-5172, December.
    46. Stern, David I. & Common, Michael S. & Barbier, Edward B., 1996. "Economic growth and environmental degradation: The environmental Kuznets curve and sustainable development," World Development, Elsevier, vol. 24(7), pages 1151-1160, July.
    47. Baek, Jungho & Kim, Hyun Seok, 2011. "Trade Liberalization, Economic Growth, Energy Consumption and the Environment: Time Series Evidence from G-20 Economies," East Asian Economic Review, Korea Institute for International Economic Policy, vol. 15(1), pages 3-32, March.
    48. Peter Pedroni, 2001. "Purchasing Power Parity Tests In Cointegrated Panels," The Review of Economics and Statistics, MIT Press, vol. 83(4), pages 727-731, November.
    49. G. S. Maddala & Shaowen Wu, 1999. "A Comparative Study of Unit Root Tests with Panel Data and a New Simple Test," Oxford Bulletin of Economics and Statistics, Department of Economics, University of Oxford, vol. 61(S1), pages 631-652, November.
    50. Tang, Chor Foon & Tan, Bee Wah & Ozturk, Ilhan, 2016. "Energy consumption and economic growth in Vietnam," Renewable and Sustainable Energy Reviews, Elsevier, vol. 54(C), pages 1506-1514.
    51. Shafik, Nemat & Bandyopadhyay, Sushenjit, 1992. "Economic growth and environmental quality : time series and cross-country evidence," Policy Research Working Paper Series 904, The World Bank.
    52. Pedroni, Peter, 1999. "Critical Values for Cointegration Tests in Heterogeneous Panels with Multiple Regressors," Oxford Bulletin of Economics and Statistics, Department of Economics, University of Oxford, vol. 61(0), pages 653-670, Special I.
    53. Saboori, Behnaz & Sulaiman, Jamalludin & Mohd, Saidatulakmal, 2012. "Economic growth and CO2 emissions in Malaysia: A cointegration analysis of the Environmental Kuznets Curve," Energy Policy, Elsevier, vol. 51(C), pages 184-191.
    54. Begum, Rawshan Ara & Sohag, Kazi & Abdullah, Sharifah Mastura Syed & Jaafar, Mokhtar, 2015. "CO2 emissions, energy consumption, economic and population growth in Malaysia," Renewable and Sustainable Energy Reviews, Elsevier, vol. 41(C), pages 594-601.
    55. Levin, Andrew & Lin, Chien-Fu & James Chu, Chia-Shang, 2002. "Unit root tests in panel data: asymptotic and finite-sample properties," Journal of Econometrics, Elsevier, vol. 108(1), pages 1-24, May.
    56. Robaina Alves, Margarita & Moutinho, Victor, 2013. "Decomposition analysis and Innovative Accounting Approach for energy-related CO2 (carbon dioxide) emissions intensity over 1996–2009 in Portugal," Energy, Elsevier, vol. 57(C), pages 775-787.
    57. Niu, Shuwen & Ding, Yongxia & Niu, Yunzhu & Li, Yixin & Luo, Guanghua, 2011. "Economic growth, energy conservation and emissions reduction: A comparative analysis based on panel data for 8 Asian-Pacific countries," Energy Policy, Elsevier, vol. 39(4), pages 2121-2131, April.
    58. Breitung, Jorg, 2002. "Nonparametric tests for unit roots and cointegration," Journal of Econometrics, Elsevier, vol. 108(2), pages 343-363, June.
    59. Richard Kozul-Wright & Piergiuseppe Fortunato, 2012. "International Trade and Carbon Emissions," The European Journal of Development Research, Palgrave Macmillan;European Association of Development Research and Training Institutes (EADI), vol. 24(4), pages 509-529, September.
    60. Al-mulali, Usama & Fereidouni, Hassan Gholipour & Lee, Janice Y.M. & Sab, Che Normee Binti Che, 2013. "Exploring the relationship between urbanization, energy consumption, and CO2 emission in MENA countries," Renewable and Sustainable Energy Reviews, Elsevier, vol. 23(C), pages 107-112.
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    More about this item

    Keywords

    Carbon dioxide emissions; Energy consumption; Income; Trade openness; Population growth;
    All these keywords.

    JEL classification:

    • Q4 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Energy
    • Q43 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Energy - - - Energy and the Macroeconomy
    • Q5 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Environmental Economics
    • Q56 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Environmental Economics - - - Environment and Development; Environment and Trade; Sustainability; Environmental Accounts and Accounting; Environmental Equity; Population Growth
    • Q57 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Environmental Economics - - - Ecological Economics

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