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G. S. Maddala and S. Wu, “A Comparative Study of Unit Root Tests with Panel Data and New Simple Test,” Oxford Bulletin of Economics and Statistics, Vol. 61, No. S1, 1999, pp. 631-652.
http://dx.doi.org/10.1111/1468-0084.61.s1.13

has been cited by the following article:

• TITLE: Environmental Kuznets Curve for Water Pollution: The Case of Border Countries

  AUTHORS: Alexi Thompson

  KEYWORDS: Environmental Kuznets Curve; Water Pollution; Border Countries

  JOURNAL NAME: Modern Economy, Vol.5 No.1, January 23, 2014

  ABSTRACT: This paper looks for evidence of an environmental Kuznets curve for water pollution in countries that share major rivers as their border. The data in this paper consist of a panel of 21 years and 30 countries, seven of which are border countries. The turning point for the border countries is much lower than that for the other subset. A t-test comparing group means for income and biochemical oxygen demand levels for both subsets finds no statistical difference for either variable, implying that countries sharing a river may be able to enforce environmental regulations more effectively than countries not sharing a river.