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- Recurrent event data analysis with intermittently observed time-varying covariates. Statistics in Medicine 2016. 35:3049-3065 .
- Vaccine design via nonnegative lasso-based variable selection. Statistics in Medicine 2015. 34:1791-1798 .
- Semiparametric mixture survival model with application to MRFIT study. Revstat Statistical Journal 2014. 7:19-26 .
- Acute-to-Chronic Ratio as a Metric for HIV Surveillance. Open Journal of Statistics 2014. 4:111-117 .
- A model checking method for the proportional hazards model with recurrent gap time data. Biostatistics (Oxford) 2011. 12:535-547 .
- Semiparametric dimension reduction estimation for mean response with missing data. Biometrika 2010. 97:305-319 .
- Empirical Likelihood-Based Estimation of the Treatment Effect in a Pretest–Posttest Study. Journal of the American Statistical Association 2008. 103:1270-1280 .
- Accounting for Variability in Sample Size Estimation with Applications to Nonadherence and Estimation of Variance and Effect Size. Biometrics 2007. 63:465-474 .
- Random effects and latent processes approaches for analyzing binary longitudinal data with missingness: A comparison of approaches using opiate clinical trial data. Statistical Methods in Medical Research 2007. 16:417-439 .
- The accelerated biased coin up-and-down design in phase I trials. Journal of Biopharmaceutical Statistics 2004. 14:249-260 .
- A permutation approach to the Behrens-Fisher problem. Journal of the Korean Statistical Society 2004. 33:79-97 .
- A random effects transition model for longitudinal binary data with informative missingness. Statistica Neerlandica 2003. 57:100-111 .
- Comparing HLA antigen frequencies between two groups of patients†. Statistics in Medicine 2003. 22:1999-2013 .
- Comparing HLA antigen frequencies between two groups of patients. Statistics in Medicine 2003. 22:1999-2013 .
- Designing Monte Carlo implementations of permutation or bootstrap hypothesis tests. The American Statistician 2002. 56:63-70 .
- A latent autoregressive model for longitudinal binary data subject to informative missingness. Biometrics 2002. 58:631-642 .
- Parametric and semiparametric approaches to testing for seasonal trend in serial count data. Biostatistics (Oxford) 2002. 3:289-298 .
- Regression analysis based on pairwise ordering of patients' clinical histories. Statistics in Medicine 2002. 21:3353-3367 .
- Testing for treatment and interaction effects in semi-parametric analysis of covariance†. Statistics in Medicine 2001. 20:1-19 .
- Testing for treatment and interaction effects in semi-parametric analysis of covariance. Statistics in Medicine 2001. 20:1-19 .
- On the effect of treatment among would-be treatment compliers: An analysis of the multiple risk factor intervention trial. Journal of the American Statistical Association 2000. 95:1101-1109 .
- Modeling repeated count data subject to informative dropout. Biometrics 2000. 56:667-677 .
- Use of summary measures to adjust for informative missingness in repeated measures data with random effects. Biometrics 1999. 55:75-84 .
- A simple permutation-type method for testing circular uniformity with correlated angular measurements. Biometrics 1999. 55:782-791 .
- Use of summary measures to adjust for informative missingness in repeated measures data with random effects. Biometrics 1999. 55:75-84 .
- Repeated probit regression when covariates are measured with error. Biometrics 1999. 55:403-409 .
- A multivariate test of interaction for use in clinical trials. Biometrics 1999. 55:1151-1155 .
- Valid inference in random effects meta-analysis. Biometrics 1999. 55:732-737 .
- A simple permutation-type method for testing circular uniformity with correlated angular measurements. Biometrics 1999. 55:782-791 .
- Bayesian monitoring of event rates with censored data. Biometrics 1999. 55:603-607 .
- A multivariate test of interaction for use in clinical trials. Biometrics 1999. 55:1151-1155 .
- Repeated probit regression when covariates are measured with error. Biometrics 1999. 55:403-409 .
- Group sequential monitoring of multi-armed clinical trials. Drug Information Journal 1999. 33:479-486 .
- Bayesian monitoring of event rates with censored data. Biometrics 1999. 55:603-607 .
- Valid inference in random effects Meta-analysis. Biometrics 1999. 55:732-737 .
- Nonstandard multivariate tests. .
- A restricted test of circadian rhythm. Journal of the American Statistical Association 1997. 92:717-724 .
- A generalized estimating equation approach for modeling random length binary vector data. Biometrics 1997. 53:1116-1124 .
- Monitoring multi-armed trials. Statistics in Medicine 1994. 13:1441-1452 .
- Growth curve models with restrictions on random parameters. Communications in Statistics: Theory and Methods 1992. 21:2775-2795 .
- Effects of assumption violations on type I error rate in group sequential monitoring. Biometrics 1992. 48:1131-1143 .
- The effect of screening on some pretest-posttest test variances. Biometrics 1991. 47:763-771 .
- Identifiability of finite mixtures of logistic regression models. Journal of Statistical Planning and Inference 1991. 27:375-381 .
- Personal characteristics, unemployment insurance, and the duration of unemployment. Journal of Econometrics 1990. 45:351-366 .
- Modelling failures of intermittently used machines. Applied Statistics 1990. 39:115-123 .
- Generalizing logistic regression by nonparametric mixing. Journal of the American Statistical Association 1989. 84:295-300 .
- Distinguishing heterogeneity from decreasing hazard rates. Technometrics 1988. 30:389-396 .