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Sang Kyu Lee

Postdoctoral Fellow
National Cancer Institute
sangkyu.lee (at) nih.gov



Publications

[Google Scholar]

* denotes equal contribution
† denotes corresponding author
underline denotes students whom I advised/co-advised

Preprints/Submitted Papers

  1. StaRQR-K: Discovering Regulatory Switches in Cancer Epigenomes via False Discovery Rate Controlled Regional Quantile Regression
    Lee, S. K., Zhang, T., Hong, H. G.†, and Weng, H.†
    submitted (2025+)
  2. High-dimensional Partial Linear Model with Trend Filtering
    Lee, S. K., Loftfield, E., Hong, H. G.†, and Weng, H.†
    arXiv (2024+)
  3. Causal Decomposition Framework for Quantifying Intervenable Cancer Health Disparities
    Xia, F.*, Lee, S. K.*, Kim, S., Blum, K., Hong, H. G., Canchola, A. J., Shariff-Marco, S., Gomez, S. L. and Kim, M.-O.†
    submitted (2025+)
  4. Decomposition of Longitudinal Disparities: an Application to the Fetal Growth-Singletons Study
    Lee, S. K., Kim, S., Kim, M.-O., Grantz, K. L., and Hong, H. G.†
    arXiv (2024+)
    Winner of the ASA Statistics in Epidemiology Section Junior Researcher/Student Paper Competition in Joint Statistical Meeting (JSM) 2024

Published Papers (Statistical Methods, Theories, and Software)

  1. A Comprehensive Estimator for the Fréchet Distribution: Asymptotical Efficiency, and Practical Applications
    Lee, S. K., Hong, H. G., and Kim, H.-M.†
    Journal of Korean Statistical Society (2025)
  2. MLEce: Statistical Inference for Asymptotically Efficient Closed-form Estimators in R
    Zhao, J., Kim, Y.-K., Jang, Y.-H., Chang, J. H., Lee, S. K., and Kim, H.-M.†
    SoftwareX (2024)
  3. An Asymptotically Efficient Closed-form Estimator for the Dirichlet Distribution
    Chang, J. H., Lee, S. K., and Kim, H.-M.†
    Stat (2023)
  4. Quantile Forward Regression for High-dimensional Survival Data
    Lee, E. R., Park, S., Lee, S. K., and Hong, H. G.†
    Lifetime Data Analysis (2023)
  5. Two Tests Using More Assumptions but Lower Power
    Lee, S. K., and Kim, H.-M.†
    Communications for Statistical Applications and Methods (2023)
  6. Further Sharpening of Jensen's Inequality
    Lee, S. K., Chang, J. H., and Kim, H.-M.†
    Statistics (2021)
    Honorable Mention from Student Paper Competition for Korean Statistical Society Academic Conference 2019
  7. EMSS: New EM-type Algorithms for the Heckman Selection Model in R
    Yang, K., Lee, S. K., Zhao, J., and Kim, H.-M.†
    R Journal (2021)
  8. Some Counterexamples of a Skew-normal Distribution
    Zhao, J., Lee, S. K., and Kim, H.-M.†
    Communications for Statistical Applications and Methods (2019)

Published Papers (Collaborative Applications)

  1. Identification and Validation of Poly-Metabolite Scores for Diets High in Ultra-Processed Food: An Observational Study and Post-Hoc Randomized Controlled Crossover-Feeding Trial
    Abar, L., Steele, E. M., Lee, S. K., Kahle, L., Moore, S. C., Watts, E., Matthews, C., Herrick, K., Hall, K. D., O’Connor, L. E., Freedman, N. D., Sinha, R., Hong, H. G., and Loftfield, E.†
    PLOS Medicine (2025)
  2. Superficial X-ray in the treatment of nonaggressive basal and squamous cell carcinoma in the elderly: A 22-year retrospective analysis
    Mattia, A., Thompson, A., Lee, S. K., Hong, H. G., Green, W. H.†, and Cognetta Jr, A. B.
    Journal of the American Academy of Dermatology (2024)

Statistical Software

  1. RQRscreen
    Maintainer
    An R function for a regional quantile regression model to screening features with ultrahigh-dimensional data
    GitHub
  2. frechetAEE
    Maintainer
    An R package for an asymptotically efficient estimator for the Frechet distribution
    GitHub
  3. plmR
    Maintainer
    An R package for estimating and fitting various high-dimensional partial linear models
    GitHub
  4. vcPB
    Maintainer
    An R package for estimating the disparity between a majority group and a minority group based on the extended model of the Peters-Belson method
    CRAN GitHub
  5. MLEce
    Author
    An R package for estimating asymptotically efficient closed-form estimators and providing the goodness of fit, estimates, plots and etc
    CRAN
  6. EMSS
    Maintainer
    An R package for fitting some new EM-Type estimation methods for the Heckman selection model
    CRAN GitHub
  7. DiSSMod
    Maintainer
    An R package for fitting sample selection models for discrete response variables
    CRAN Shiny