With or Without U? The Appropriate Test for a U‐Shaped Relationship*

Jo Lind and Halvor Mehlum

Oxford Bulletin of Economics and Statistics, 2010, vol. 72, issue 1, 109-118

Abstract: Nonlinear relationships are common in economic theory, and such relationships are also frequently tested empirically. We argue that the usual test of nonlinear relationships is flawed and derive the appropriate test for a U‐shaped relationship. Our test gives the exact necessary and sufficient conditions for the test of a U shape in finite samples in a large class of models.

Date: 2010
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Citations: View citations in EconPapers (659)

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https://doi.org/10.1111/j.1468-0084.2009.00569.x

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Working Paper: With or Without U? The appropriate test for a U shaped relationship (2007)
Working Paper: With or Without U? - The appropriate test for a U shaped relationship (2007)
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