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cemmap Working Papers
July 2008 CWP21/08
Article
Testing for stochastic monotonicity
Type: cemmap Working Papers
Authors: Sokbae 'Simon' Lee, Oliver Linton and Yoon-Jae Whang
Now published in: Econometrica [Details]

We propose a test of the hypothesis of stochastic monotonicity. This hypothesis is of interest in many applications in economics. Our test is based on the supremum of a rescaled U-statistic. We show that its asymptotic distribution is Gumbel. The proof is diffcult because the approximating Gaussian stochastic process contains both a stationary and a nonstationary part and so we have to extend existing results that only apply to either one or the other case. We also propose a refinement to the asymptotic approximation that we show works much better infinite samples. We apply our test to the study of intergenerational income mobility.

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