The Environmental Kuznets Curve, Cointegration and Nonlinearity

Wagner, Martin (2015) The Environmental Kuznets Curve, Cointegration and Nonlinearity. Journal of Applied Econometrics, 30 (6), pp. 948-967.

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Abstract or Table of Contents

This paper clarifies some conceptual shortcomings of the empirical environmental Kuznets curve (EKC) literature that arise because of the hitherto inadequate application of unit root and cointegration techniques. The literature to date has ignored the fact, and a fortiori the consequences, that powers of integrated processes are themselves not integrated processes. The paper explains why standard methods should not be applied and discusses some recently proposed viable estimation and testing approaches for cointegrating polynomial regressions. The application to CO2 and SO2 emissions data shows that using appropriate methods leads to strongly reduced evidence for a cointegrating EKC compared to typical but conceptually not sound findings.

Item Type: Article in Academic Journal
Status: Published
Date Deposited: 19 Feb 2015 12:44
Last Modified: 08 Jun 2017 13:27
Identification Number or DOI: 10.1002/jae.2421
ISSN: 08837252

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