Research Interest
Empirical likelihood, Bartlett correction, variable selection, survival analysis

Publications
    Li, X., Wu, Y., Tu, D. (2012). Jackknifed random weighting for Cox proportional hazards model. Science in China Series A: Mathematics, Vol. 55(4), 775-786.
    Pritchard, K. I., Munro, A., O’Malley, F. P., Tu, D., Li, X., Levine, M. N., Shepherd, L. E., Chia, S., Bartlett, J. M. S. (2012). Chromosome 17 Centromere (CEP17) Duplication as a Predictor of Anthracycline Response:  Evidence from the NCIC Clinical Trials Group (NCIC CTG) MA.5 Trial. Breast Cancer Research and Treatment.  Breast Cancer and Treatment, Vol. 131(2), 541-551.
    Li, X., Chen, J., Wu, Y., Tu, D. (2011). Constructing confidence regions with high order precision by adjusted exponential empirical likelihood. Statistica Sinica, Vol. 21, 1767-1783.
    Li, X., Wu, Y., Tu, D. (2009). Adjusted empirical likelihood in Cox proportional hazard model. Journal of University of Science and Technology of China, Vol. 39, 1253-1259.
    Li, X., Wu, Y., Tu, D. (2008). A Bartlett type correction for Wald test in Cox regression model. Statistics and Probability Letters, Vol. 78, 2614-2622.