An understanding of the empirical relationship between income and environmental quality is evolving through recent studies investigating the Environmental Kuznets Curve (EKC). The EKC represents an inverted-U relationship between income and environmental degradation. However, studies may employ different methods, evaluate different environmental indicators, and use different data, resulting in a broad spectrum of findings and leading to sometimes conflicting interpretations. The purpose of this paper is to synthesize the results of existing EKC findings by conducting a statistical meta-analysis, and to predict new income turning points (ITP). Results indicate how both methodological choices and pollutant types affect ITPs. (JEL Q20).
This study involved an attempt to locate among the students at the University of Minnesota some who could duplicate or better the extra-sensory performance of Rhine's subjects at Duke University with Zener cards. None of the subjects tested displayed an extra-sensory ability.
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