A note on testing for skewness persistence

A note on testing for skewness persistence

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Article ID: iaor1997775
Country: United States
Volume: 42
Issue: 1
Start Page Number: 138
End Page Number: 141
Publication Date: Jan 1996
Journal: Management Science
Authors:
Keywords: testing, investment
Abstract:

This paper shows that the tests of skewness persistence considered by Muralidhar far exceed the true Type I error. That is, the probabilities of detecting an increase (decrease) in skewness from one time period to another when in fact there is no change are inflated. Consequently, the higher power achieved by these tests comes at the cost of a higher than specified level of Type I error. The paper proposes a new test which maintains, the specified Type I error levels. Additionally, the power of this test for lognormal distributions is reported.

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