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Detection of influential observations in nonlinear reproductive dispersion models

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A robust case-deletion diagnostic which could avoid masking is presented for nonlinear reproductive dispersion models (NRDM) (Jorgensen, 1997) that include generalized linear models and exponential family nonlinear models as special cases. Based on the second-order approximation of log-likelihood displacement and Poon & Poon’s (1999) conformal normal curvature, a measure of local influence ranging from 0 to 1 is constructed. An example illustrates application of the techniques.
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Keywords: conformal normal curvature; diagnostics; jackknife robust estimate; likelihood displacement; local influence; masking; nonlinear reproductive dispersion models

Document Type: Original Article

Affiliations: Yunnan University and Southeast University

Publication date: June 1, 2002

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