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utest: ado-file for testing for a U-shape

From   Halvor Mehlum <>
Subject   utest: ado-file for testing for a U-shape
Date   Mon, 08 Oct 2007 13:52:28 +0200

Dear Statalisters

Thanks to Kit Baum, -utest- ado-file is now available from SSC.

-utest- provides the exact test of the presence of a U shaped (or
inverse U shaped) relationship on an interval. -utest- is used after estimation commands to test for the presence of a U-shaped or
inverse U-shaped relationship between an explanatory variable and the outcome variable on a specific interval.

For details see:

For the companion paper
"With or Without U? - The appropriate test for a U shaped relationship" see:

All the best
Jo Thori Lind and Halvor Mehlum

Halvor Mehlum
Department of Economics, University of Oslo
Box 1095, Blindern
0317 Oslo Norway
Phone : +47 22855152 Fax: +47 22855256
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