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The econometric consequences of an energy consumption variable in a model of CO2 emissions

Mohammad Jaforullah and Alan King

Energy Economics, 2017, vol. 63, issue C, 84-91

Abstract: Many studies that model the determinants of CO2 emissions treat energy consumption as one of its determinants. Itkonen (2012) argues that this causes underestimation of both the responsiveness of CO2 emissions to income growth and the turning point of the carbon Kuznets curve. We first demonstrate that Itkonen's (2012) conclusions are sensitive to the assumed form of the relationship between energy consumption and income. We then argue that the presence of an energy consumption variable in a model of CO2 emissions can lead to systematic volatility in its coefficients, which has the potential to change their magnitude and sign. We also argue that misleading cointegration test results can be generated by such a model. The potential nature and severity of these effects are illustrated with data for seven countries.

Keywords: CO2 emissions; Energy consumption; Carbon intensity; Carbon Kuznets curve; Systematic volatility (search for similar items in EconPapers)
JEL-codes: Q43 Q54 (search for similar items in EconPapers)
Date: 2017
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Energy Economics is currently edited by R. S. J. Tol, Beng Ang, Lance Bachmeier, Perry Sadorsky, Ugur Soytas and J. P. Weyant

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