[U] User's Guide

34 [ U ] 1 Read this—it will helpTo learn what has been added since this manual was printed, select Help > What’s New? or type. help whatsnewWe hope that you enjoy Stata 11.1.4 ReferencesChambers, J. M., W. S. Cleveland, B. Kleiner, and P. A. Tukey. 1983. Graphical Methods for Data Analysis. Belmont,CA: Wadsworth.Everitt, B. S. 2006. The Cambridge Dictionary of Statistics. 3rd ed. Cambridge: Cambridge University Press.Freedman, L. S. 1982. Tables of the number of patients required in clinical trials using the logrank test. Statistics inMedicine 1: 121–129.Heyde, C. C., and E. Seneta, ed. 2001. Statisticians of the Centuries. New York: Springer.Johnson, N. L., and S. Kotz, ed. 1997. Leading Personalities in Statistical Sciences: From the Seventeenth Century tothe Present. New York: Wiley.Lachin, J. M., and M. A. Foulkes. 1986. Evaluation of sample size and power for analyses of survival with allowancefor nonuniform patient entry, losses to follow-up, noncompliance, and stratification. Biometrics 42: 507–519.Rubinstein, L. V., M. H. Gail, and T. J. Santner. 1981. Planning the duration of a comparative clinical trial with lossto follow-up and a period of continued observation. Journal of Chronic Diseases 34: 469–479.Schoenfeld, D. A. 1981. The asymptotic properties of nonparametric tests for comparing survival distributions. Biometrika68: 316–319.Stock, J. H., and M. W. Watson. 2008. Heteroskedasticity-robust standard errors for fixed effects panel data regression.Econometrica 76: 155–174.Tarone, R. E. 1985. On heterogeneity tests based on efficient scores. Biometrika 72: 91–95.Upton, G., and I. Cook. 2006. A Dictionary of Statistics. 2nd ed. Oxford: Oxford University Press.