Distinguished Professor of Statistics, Rutgers, the State University of New Jersey

• Full CV
• Research statement
• Teaching statement
• Books:
  • Kolassa, J.E. (2020) An Introduction to Nonparametric Statistics, Taylor and Francis.
  • Kolassa, J.E. (2006) Series Approximation Methods in Statistics, Springer.
• Selected Peer-Reviewed Papers
  Papers are in reverse chronological order; the list is also available in chronological order, and including most abstracts.
  1. Yang, J. and Kolassa, J.E. (2021), "The Impact of Application of Jackknife to the Sample Median", American Statistician
  2. Kolassa, J.E., and Kuffner, T.A. (2020), "On the validity of the formal Edgeworth expansion for posterior densities", Annals of Statistics
  3. Zawada, J., Kolassa, J.E., and Seifu, Y. (2019), "Statistical Significance: Reliability of P-Values Compared to Other Statistical Summaries", Current Trends in Biostatistics and Biometrics
  4. Morales, K., Krause-Parello, C.A, Hatzfeld, J.J., Simpson, M., Friedmann, E., Kolassa, J., and Wilson, C. (2019), "Strategic Aeromedical Evacuation (AE): Examining Biological and Psychosocial Stress in AE Patients", Military Behavioral Health
  5. Cohen, A., Kolassa, J., and Sackrowitz, H. (2019), "Penalized likelihood and multiple testing", Biometrical Journal
  6. Krause-Parello, C.A., Thames, M., Ray, C.M., and Kolassa, J. (2018), "Examining the Effects of a Service-Trained Facility Dog on Stress in Children Undergoing Forensic Interview for Allegations of Child Sexual Abuse", Journal of Child Sexual Abuse
  7. Xie, M., Kolassa, J., Liu, D., Liu, R., and Liu, S. (2018), "Does an observed zero-total-event study contain information for inference of odds ratio in meta-analysis?", Statistics and Its Interface
  8. Chen, X., and Kolassa, J. (2018), "Various Improved Approximations to Distributions of Quadratic Test Statistics for Dependent Rank Sums", Biomedical Journal of Scientific and Technical Research
  9. Krause-Parello, C., Levy, C., Holman, E., and Kolassa, J.E. (2018), "Effects of VA Facility Dog on Hospitalized Veterans Seen by a Palliative Care Psychologist: An Innovative Approach to Impacting Stress Indicators", American Journal of Hospice and Palliative Medicine
  10. Kolassa, J.E., and Robinson, J. (2017), "Nonparametric Tests for Multi-parameter M-Estimators", Journal of Multivariate Analysis
  11. Zhu, Y., and Kolassa, J.E. (2017), "Assessing and Comparing the Accuracy of Various Bootstrap Methods", Communications in Statistics - Theory and Methods
  12. Krause-Parello, C.A., and Kolassa, J. (2016), "Pet Therapy: Enhancing Social and Cardiovascular Wellness in Community Dwelling Older Adults", Journal of Community Health Nursing
  13. Hao, Y., and Kolassa, J.E. (2016), "Multiple Comparisons in the Analysis of a Crossover Trial: PTSD of U.S. Soldiers", Statistics in Biosciences
  14. Kolassa, J.E. (2016), "Inference in the Presence of Likelihood Monotonicity for Polytomous and Logistic Regression", Advances in Pure Mathematics
  15. Kolassa, J.E., and Seifu, Y. (2013), "Nonparametric Multivariate Inference on Shift Parameters", Academic Radiology
  16. Zhang, J., and Kolassa, J.E. (2013), A practical procedure to find matching priors for frequentist inference, Communications in Statistics -- Theory and Methods
  17. Kolassa, J.E., and Bhagavatula, H.G. (2012), "Accurate Approximations to the Distribution of a Statistic Testing Symmetry in Contingency Tables", Contemporary Developments in Bayesian Analysis and Statistical Decision Theory: A Festschrift for William E. Strawderman (ed. D. Fourdrinier, E. Marchand, and A.L. Ruhkin)
  18. Kolassa, J.E., and Robinson, J. (2011), Saddlepoint approximations for likelihood ratio like statistics with applications to permutation tests, Annals of Statistics
  19. Lev, E.L., Kolassa, J., and Bakken, L.L. (2010), Faculty mentors' and students' perceptions of students' research self-efficacy, Nursing Education Today
  20. Li, J., and Kolassa, J.E. (2010), Multivariate Marginal and Conditional Saddlepoint Tail Probability Approximations, Bernoulli
  21. Golmohammadi, D., Creese, R.C., Valian, H., and Kolassa J. (2009), Supplier selection based on a neural network model using genetic algorithm, IEEE Trans Neural Netw.
  22. Scheetz, L.J., Zhang, J. and John Kolassa, J. (2009), Classification tree modeling to identify severe and moderate vehicular injuries in young and middle-aged adults, Artificial Intelligence in Medicine
  23. Safford, M.M., Brimacombe, M., Zhang, Q., Rajan, M., Xie, M., Thompson, W., Kolassa, J., Maney, M., and Pogach, L. (2009), Patient complexity in quality comparisons for glycemic control: an observational study, Implementation Science
  24. Sheetz, L.J., Zhang, J., Kolassa, J.E., Allen, P., and Allen, M. (2008), Evaluation of Injury Databases as a Preliminary Step to Developing a Triage Decision Rule, Journal of Nursing Research
  25. Scheetz, L.J., Zhang, J., and Kolassa, J.E. (2008), Evaluating Injury Databases as a Preliminary Step in the Development of a Triage Decision Rule, Journal of Nursing Scholarship
  26. Kolassa, J.E. (2007), A Proof of the Asymptotic Equivalence of Two Tail Probability Approximations, Communications in Statistics -- Theory and Methods
  27. Scheetz, L.J., Zhang, J., and Kolassa, J.E. (2007), Using Crash Scene Variables to Predict the Need for Trauma Center Care in Older Persons, Research in Nursing and Health
  28. Lev, E., Eller, L., Kolassa, J., Gejerman, G., Colella, J., Lane,P. , Scrofine, S., Esposito, M., Lanteri, V., Scheuch, J., Munver, R., Galli, B., Watson, R., and Sawczuk, I. (2006), Exploratory factor analysis: strategies used by patients to promote health, World Journal of Urology
  29. Pogach, L., Xie, M., Shentue, Y., Tseng, CL., Maney, M., Rajan, M., Tiwari, A., Kolassa, J., Helmer, D., Crystal, S., and Safford, M. (2005), Diabetes healthcare quality report cards: how accurate are the grades?, American Journal of Managed Care
  30. Yang, B., and Kolassa, J.E. (2005), A Refinement to Approximate Conditional Inference, Statistics and Probability Letters
  31. Cohen, A., Kolassa, J.E., and Sackrowitz, H.B. (2005), A Four Action Problem with Ordered Categorical Data: Are Two Distributions the Same, Ordered, or Otherwise?, Statistics and Probability Letters
  32. Tseng, C.L., Brimacombe, M., Xie, M., Rajan, M., Wang, H., Kolassa, J., Crystal, S., Chen, T.C., Pogach, L., and Safford, M. (2005), Seasonal Patterns in Monthly A1c Values, American Journal of Epidemiology
  33. Kolassa, J.E., and Yang, B. (2004), Smooth and Accurate Multivariate Confidence Regions, Journal of the American Statistical Association
  34. Kolassa, J.E. (2004), Approximate Multivariate Conditional Inference Using the Adjusted Profile Likelihood, Canadian Journal of Statistics
  35. Cohen, A., Kolassa, J.E., and Sackrowitz, H.B. (2004), A test for homogeneity of odds ratios in ordered 2x2 tables, Biometrical Journal
  36. Kolassa, J.E. (2003), Algorithms for Approximate Conditional Inference, Statistics and Computing
  37. Kolassa, J.E. (2003), Multivariate Saddlepoint Tail Probability Approximations, Annals of Statistics
  38. Kolassa, J.E. (2003), Saddlepoint Distribution Function Approximations in Biostatistical Inference, Statistical Methods in Medical Research
  39. Yang, B., and Kolassa, J.E. (2002), Saddlepoint Approximation for the Distribution Function Near the Mean, Annals of the Institute of Statistical Mathematics
  40. Jing, B-Y., Kolassa, J.E., and Robinson, J. (2002), Partial saddlepoint approximations for transformed means, Scandinavian Journal of Statistics
  41. Tawil, R., Griggs, R., Jackson, C., Amato, A., Barohn, R., Nations, S., Kissel, J., Mendell, J., Genge, A., Karpati, G., Rose, M., McDermott, M., Pandya, S., Myers, D., Herberlin, L., King, W., Holt, S., Finch, L., Cowman, J., Cos, L., Wrench, M., Sherman, C., Harding, K., Downing, K., Triguero, M., Morrison, C., Holloway, R., Higgins, D., Kolassa, J., Janciuras, J., Martens, W., Gregory, S., and Blood, C. (2001), Randomized pilot trial of beta INF1a (Avonex) in patients with inclusion body myositis, Neurology
  42. Looney, J.L., Hasan, M.S., Coffin, D., Campbell, D., Falsey, A.R., Kolassa, J.E., Agosti, J.M., Abraham, G.N., and Evans, T.G. (2001), Hepatitis B Immunization of Healthy Elderly Adults: Relationship between Naive CD4+ T Cells and Primary Immune Response, and Evaluation of GM-CSF as an Adjuvant, Journal of Clinical Immunology
  43. Horan, J.T., Francis, C.W., Falsey, A.R., Kolassa, J., Smith, B.H., and Hall, W.J. (2001), Prothrombotic changes in hemostatic parameters and C-reactive protein in the elderly with winter acute respiratory tract infections, Thrombosis and Haemostasis
  44. Falsey, A.R., Walsh, E.E., Francis, C.W., Looney, R.J., Kolassa, J.E., Hall, W.J., and Abraham, G.N. (2001), Response of C-Reactive Protein (CRP) and Serum Amyloid A (SAA) to Influenza A Infection in Older Adults, Journal of Infectious Diseases
  45. Kolassa, J.E. (2001), Bounding Convergence Rates for Markov Chains: An Example of the Use of Computer Algebra, Statistics and Computing
  46. Kolassa, J.E. (2001), Saddlepoint Approximation at the Edges of a Conditional Sample Space, Statistics and Probability Letters
  47. Kolassa, J.E. (2000), Explicit Bounds for Geometric Convergence of Markov Chains, Journal of Applied Probability
  48. Kolassa, J.E. and Tanner, M.A. (1999), Approximate Monte Carlo Conditional Inference in Exponential Families, Biometrics
  49. Kolassa, J.E., and Tanner, M.A. (1999), Small Sample Confidence Regions in Exponential Families, Biometrics
  50. Lanphear, B.P., Howard, C., Eberly, S., Auinger, P., Kolassa, J., Weitzman, M., Schaffer, S.J., and Alexander, K. (1999), Primary Prevention of Childhood Lead Exposure: A Randomized Trial of Dust Control, Pediatrics
  51. Looney, R.J., Falsey, A., Campbell, D., Torres, A., Kolassa, J., Brower, C., McCann, R., Menegus, M., McCormick, K., Frampton, P., Hall, W., and Abraham, G.N. (1999), Role of Cytomegalovirus in the T cell changes seen in elderly individuals, Clinical Immunology
  52. Falsey, A., Criddle, M.M., Kolassa, J.E., McCann, R.M., Brower, C., and Hall, W. (1999), Evaluation of a Handwashing Intervention to Reduce Respiratory Illness Rates in Senior Day-Care Centers, Infection Control and Hospital Epidemiology
  53. Falsey, A.R., Walsh, E.E., Looney, R.J., Kolassa, J.E., Formica, M.A., Criddle, M.C., Hall, W.J. (1999), Comparison of respiratory syncytial virus humoral immunity and response to infection in young and elderly adults, J. Med. Virol.
  54. Kolassa, J.E. (1999), Convergence and Accuracy of Gibbs Sampling for Conditional Distributions in Generalized Linear Models, Annals of Statistics
  55. Kolassa, J.E. (1999), Confidence Intervals for Parameters Lying in a Random Polygon, Canadian Journal of Statistics
  56. Wood, J.P., Kolassa, J.E., and McBride, J.T. (1998), Changes in Alveolar Septal Border Lengths with Postnatal Lung Growth, American Journal of Physiology
  57. Falsey, A.R., McCann, R.M., Hall, W.J., Criddle, M.M., Formica, M.A., Wycoff, D., and Kolassa, J.E. (1997), The Common Cold in Frail Older Persons: Impact of Rhinovirus and Coronavirus in a Senior Daycare Center, Journal of the American Geriatrics Society
  58. Wahlberg, K.-E., Wynne, L.C., Oja, H., Keskitalo, P., Pykäläinen, L., Lahti, I., Moring, J., Naarala, M., Sorri, A., Markku Seitamaa, M., Läksy, K., Kolassa, J., and Tienari, P. (1997), Gene--Environment Interaction in Vulnerability to Schizophrenia: Findings from the Finish Adoptive Family Study, American Journal of Psychiatry
  59. Kolassa, J.E. (1996), Higher-Order Approximations to Conditional Distribution Functions, Annals of Statistics
  60. Kolassa, J.E. (1995), Edgeworth Approximations for Rank Sum Test Statistics, Statistics and Probability Letters
  61. Falsey, A.R., McCann, R.M., Hall, W.J., Tanner, M.A., Criddle, M.M., Formica, M.A., Treanor, J.J., Irvine, C., and Kolassa, J.E. (1995), Acute Respiratory Tract Infection in Daycare Centers for the Older Persons, Journal of the American Geriatrics Society
  62. Kolassa, J.E. (1995), A Comparison of Size and Power Calculations for the Wilcoxon Statistic for Ordered Categorical Data, Statistics in Medicine
  63. Tariot, P.N., Erb, R., Leibovici, A., Podgorski, C.A., Cox, C., Asnis, J., Irvine, C., and Kolassa, J.E. (1994), Carbamazepine Treatment of Agitation in Nursing Home Patients with Dementia: A Preliminary Study, Journal of the American Geriatrics Society
  64. Kolassa, J.E., and Tanner, M.A. (1994), Approximate Conditional Inference in Exponential Families Via the Gibbs Sampler, Journal of the American Statistical Association
  65. Handcock, M.S., and Kolassa, J.E. (1992), Statistical Review of the Henhouse experiments: The Effects of a Pulsed Magnetic Field on Chick Embryos, Bioelectromagnetics
  66. Kolassa, J.E. (1992), Confidence Intervals for Thermodynamic Constants, Geochimica et Cosmochimica Acta
  67. Kolassa, J.E., and McCullagh, P. (1990), Edgeworth Series for Lattice Distributions, Annals of Statistics
• R packages
  • Hosted on CRAN:
    • PHInfiniteEstimates: Tools for Inference in the Presence of a Monotone Likelihood (most recent version)
    • MultNonParam: Multivariate Nonparametric Methods
  • Hosted on GitHub, primarily for support of teaching activities:
    • NonparametricHeuristic: Heuristic Tools for Nonparametric Statistics
    • bivcornish: Bivariate Cornish-Fisher Expansion
    • twostage: Two-Stage Wilcoxon Testing
    • TheorStat: Functions to illustrate a course in theoretical statistics