Local Conditional Influence |
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Authors: | Wai-Yin Poon Yat Sun Poon |
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Institution: |
a The Chinese University of Hong Kong, Hong Kong
b Department of Mathematics, University of California at Riverside, USA |
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Abstract: | Through an investigation of normal curvature functions for influence graphs of a family of perturbed models, we develop the concept of local conditional influence. This concept can be used to study masking and boosting effects in local influence. We identify the situation under which the influence graph of the unperturbed model contains all the information on these effects. The linear regression model is used for illustration and it is shown that the concept developed is consistent with Lawrance's (1995) approach of conditional influence in Cook's distance. |
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Keywords: | Normal curvature curvature function local conditional influence masking linear regression |
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