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Objection Overruled: A Comment on Gastwirth, Krieger, and Rosenbaum

1997; Taylor & Francis; Volume: 51; Issue: 2 Linguagem: Inglês

10.1080/00031305.1997.10473942

1537-2731

Jim Mintz, W. J. Dixon,

Advanced Statistical Methods and Models

Abstract Gastwirth, Krieger, and Rosenbaum used statistical evidence from a 1987 sex discrimination case in a Canadian court as the basis for a November 1994 article in The American Statistician on the "third variable" problem in correlational analysis. We reexamine their unsettling conclusion that the Court "accepted an impossible explanation." A revised explanatory model that includes an unmeasured latent variable leads us to a very different conclusion. The result demonstrates that references to unmeasured covariates as "third variables" in analyses of spurious association can be quite difficult or even impossible to evaluate statistically. Judging such models may depend ultimately on assessing their plausibility rather than their statistical possibility.