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The Effects Of Additive Outliers And Measurement Errors When Testing For Structural Breaks In Variance

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Executive Summary

This paper discusses the asymptotic and finite-sample properties of CUSUM-based tests for detecting structural breaks in volatility in the presence of stochastic contamination, such as additive outliers or measurement errors. This analysis is particularly relevant for financial data, on which these tests are commonly used to detect variance breaks. In particular, the author focuses on the tests by Incl?n and Tiao [IT] (1994) and Kokoszka and Leipus [KL] (1998, 2000), which have been intensively used in the applied literature. The results are extensible to related procedures.

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