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Xiangrong Yin, University of Kentucky

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Expected Conditional Characteristic Function-based Measures for Testing Independence
27 September 2018 from 4:00 PM to 5:00 PM
201 Thomas Building
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We propose a novel class of independence measures for testing independence between two random vectors based on the discrepancy between the conditional and the marginal characteristic functions. If one of the variables is categorical, our asymmetric index can be redeemed as the between group dispersion in a kernel ANOVA decomposition and leads to more powerful tests than those relying on symmetric measures. In addition, our index is also applicable when both variables are continuous. We develop two empirical estimates and obtain their respective asymptotic distributions. We illustrate the advantages of our approach by numerical studies across a variety of settings.

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