Journal of the American Statistical Association volume 81, issue 394, P471-476 1986 DOI: 10.1080/01621459.1986.10478292 View full text
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Dennis E. Jennings

Abstract: Inference for logistic regression based on the information matrix may be poor. This is noted in two examples in which confidence regions are examined. A measure to detect such inadequacies is presented; it judges the quadratic approximation to the likelihood surface, which justifies the usual procedure.