With or Without U? The Appropriate Test for a U-Shaped Relationship
Oxford bulletin of economics and statistics, 2010-02, Vol.72 (1), p.109-118 [Peer Reviewed Journal]Blackwell Publishing Ltd and the Department of Economics, University of Oxford, 2009 ;Copyright Blackwell Publishing Ltd. Feb 2010 ;ISSN: 0305-9049 ;EISSN: 1468-0084 ;DOI: 10.1111/j.1468-0084.2009.00569.x
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