REFERENCES
- Anderson , S. , Auquier , A. , Hauck , W. W. , Oakes , D. , Vandaele , W. and Weisberg , H. I. 1980 . Statistical Methods for Comparative Studies New York : John Wiley. .
- Barlow , R. E. and Proschan , F. 1975 . Statistical Theory of Reliability and Life Testing: Probability Models New York : Holt, Rinehart and Winston. .
- Bishop , Y. M. M. , Fienberg , S. E. and Holland , P. W. 1975 . Discrete Multivariate Analysis: Theory and Practice. Cambridge , MA : MIT Press. .
- Dawid , A. P. 1979 . “Conditional Independence in Statistical Theory” . Journal of the Royal Statistical Society , 41 : 1 – 31 . (with discussion), Ser. B
- Gail , M. H. , Wieand , S. and Piantadosi , S. 1984 . “Biased Estimates of Treatment Effect in Randomized Experiments with Nonlinear Regressions and Omitted Covariates,” . Biometrika , 71 : 431 – 444 .
- Good , I. J. and Mittal , Y. 1987 . “The Amalgamation and Geometry of Two-by-Two Contingency Tables,” . The Annals of Statistics , 15 : 694 – 711 .
- Greenland , S. , Holland , P. W. and Mantel , N. 1989 . “Confounding in Epidemiologic Studies,” . Biometrics , 45 : 1309 – 1322 .
- Holland , P. W. 1986 . “Statistics and Causal Inference,” . Journal of the American Statistical Association , 81 : 945 – 970 .
- Holland , P. W. and Rubin , D. B. 1988 . “Causal Inference in Retrospective Studies,” . Evaluation Review , 12 : 203 – 231 .
- Kelsey , J. L. , Thompson , W. D. and Evans , A. S. 1986 . Methods in Observational Epidemiology New York : Oxford University Press. .
- Lindley , D. V. and Novick , M. R. 1981 . “The Role of Exchangeability in Inference,” . The Annals of Statistics , 9 : 45 – 58 .
- Miettinen , O. S. and Cook , E. F. 1981 . “Confounding: Essence and Detection,” . American Journal of Epidemiology , 114 : 593 – 603 .
- Mittal , Y. 1991 . “Homogeneity of Subpopulations and Simpson's Paradox,” . Journal of the American Statistical Association , 86 : 167 – 172 .
- Rosenbaum , P. R. 1987 . “The Role of a Second Control Group in an Observational Study,” . Statistical Science , 2 : 292 – 306 .
- Rosenbaum , P. R. and Rubin , D. B. 1983 . “The Central Role of the Propensity Score in Observational Studies for Causal Effects,” . Biometrika , 70 : 41 – 55 .
- Samuels , M. L. 1981 . “Matching and Design Efficiency in Epidemiological Studies,” . Biometrika , 68 : 577 – 588 .
- Wickramaratne , P. J. and Holford , T. R. 1987 . “Confounding in Epidemiologic Studies: The Adequancy of the Control Group as a Measure of Confounding,” . Biometrics , 43 : 751 – 765 .
- Whittemore , A. S. 1978 . “Collapsibility of Multidimensional Contingency Tables,” . Journal of the Royal Statistical Society , 40 : 328 – 340 . Ser. B
- Zidek , J. 1984 . “Maximal Simpson Disaggregations of 2 X 2 Tables,” . Biometrika , 71 : 187 – 190 .