Hemant Ishwaran

Publications

  1. Rizk N.P., Ishwaran, H., Rice T.W., Chen L-Q., Hunter J.G., Kesler K.A., Law S., Lerut A., Reed C.E., Salo J.A., Scott W.J., Swisher S.G., Watson T.J., Allen M.S., and Blackstone E.H. (2008). Impact of lymphadenectomy in survival after esophagectomy for cancer.
  2. Dey, T., Ishwaran, H., and Rao, J.S. (2008). An in-depth look at highest posterior model selection. Econometric Theory, 24, 377-403. pdf
  3. Ishwaran H., Blackstone, E.H., Hansen. C.A. and Rice T.W. (2008). A novel data driven approach to stage grouping of esophageal cancer. Submitted.
  4. Ishwaran H. and Rao J.S. (2008). Clustering gene expression profile data by selective shrinkage. To appear in Stat. Prob. Letters. pdf
  5. Ishwaran H., Kogalur U.B., Blackstone, E.H. and Lauer M.S. (2008). Random survival forests. To appear in Ann. Appl. Statist.
  6. Ishwaran, H. and Papana, A. (2008). Orthogonalized smoothing for rescaled spike and slab models. IMS Collections, "Pushing the Limits of Contemporary Statistics: Contributions in Honor of Jayanta K. Ghosh", 3, 267-281. pdf
  7. Lauer M.S., Martino D., Ishwaran H. and Blackstone E.H. (2007). Quantitative measures of electrocardiographic left ventricular mass, conduction, and repolarization, and long-term survival following coronary artery bypass grafting. Circulation, 116, 888-893. pdf
  8. Kim E.S.H., Ishwaran H., Blackstone E.H. and Lauer M.S. (2007). External prognostic validations and comparisons of age- and gender-adjusted exercise capacity predictions. J. Amer. College Cardiol. 50, 1867-1875. pdf
  9. Ishwaran, H. (2007). Variable importance in binary regression trees and forests. Electronic J. Statist., 1, 519-537.
  10. Minn A.J., Gupta P.G., Padua D., Bos P., Nguyen D.X. Nuyten D., Kreike B., Zhang Y., Wang Y., Ishwaran H., Foekens J.A., van de Vijver M.J. and Massagué J. (2007). Lung metastasis genes couple breast tumor size and metastatic spread. PNAS (Genetics), 104 (16), 6740-6745. pdf
  11. Ishwaran, H., Jahandideh, M.T. and Zarepour, M. (2007). Option pricing for infinite variance data. To appear in Statistics.
  12. Ishwaran, H., James, L.F. and Zarepour M. (2007). An alternative to the m out of n bootstrap. To appear in J. Stat. Planning Inference.
  13. Weichselbaum R.R., Ishwaran H., Khodarev N., Nuyten D.S.A., Baker, S.W.,Yoon T., Su A.W., Shaikh, A.Y., Roach P., Kreike B., Roizman B., Bergh, J., Pawitan, Y., van de Vijver M.J. and Minn A.J. (2007). A gene signature for DNA damage resistance is a predictive marker for adjuvant chemotherapy and complements genomic classifiers for breast cancer. Submitted.
  14. Ishwaran, H., and Kogalur U.B. (2007). Random survival forests for R. Rnews, 7/2, 25-31. pdf
  15. Ishwaran, H. and Zarepour, M. (2007). Series representations for multivariate generalized gamma processes via a scale invariance principle. To appear in Statistica Sinica.
  16. Ishwaran, H., Rao, J.S. and Kogalur U.B. (2006). BAMarray™: Java software for Bayesian analysis of variance for microarray data. BMC Bioinformatics, 7:59.
  17. Papana, A. and Ishwaran, H. (2006). CART variance stabilization and regularization for high-throughput genomic data. Bioinformatics, 22 (18), 2254-2261.
  18. Ishwaran, H. and Rao, J.S. (2005). Spike and slab gene selection for multigroup microarray data. J. Amer. Stat. Assoc., 100, 764-780 pdf
  19. Ishwaran, H. and Rao, J.S. (2005). Spike and slab variable selection: frequentist and Bayesian strategies. Ann. of Stat., 33, 730-773. pdf
  20. Ishwaran, H. Blackstone, E.H., Pothier, C.E. and Lauer M.S. (2004). Relative risk forests for exercise heart rate recovery as a predictor of mortality. J. Amer. Stat. Assoc., 99, 591-600. pdf    Figure 6 in color
  21. Obuchowski, N.A., Beiden, S.V., Berbaum, K.S., Hillis, S., Ishwaran, H., Song. H.H., Wagner, R.F. (2004). Multi-reader, multi-case ROC analysis: an empirical comparison of five methods. Academic Radiology, 11, 980-995. pdf
  22. Koch, C.G, Khandwala, F., Cywinski, J.B., Ishwaran, H., Estafanous, F., Loop E. and Blackstone, E.H. (2004). Health-related quality of life following coronary artery bypass grafting: a gender analysis utilizing the Duke activity status index. J. Thoracic and Cardiovascular Surgery, 128, 284-295.
  23. Ishwaran, H. and James, L.F. (2004). Computational methods for multiplicative intensity models using weighted gamma processes: proportional hazards, marked point processes and panel count data. J. Amer. Stat. Assoc., 99, 175-190. pdf
  24. Ishwaran, H. (2004). Discussion to "Least Angle Regression,'' by Efron, B., Hastie, T., Johnstone, I., and Tibshirani, R. Ann. Statist. 32, 452-458. pdf
  25. Belin T.R., Ishwaran H., Duan N., Berry S.H., Kanouse D.E. (2004). Identifying likely duplicates by record linkage in a survey of prostitutes, in "Applied Bayesian Modeling and Causal Inference from an Incomplete-Data Perspectives", eds. A. Gelman and X.L. Meng. New York: John Wiley and Sons, pp 319-329. pdf   figure
  26. Ishwaran, H. and Rao, J.S. (2003). Discussion to "Frequentist Model Average Estimators" and "The Focussed Information Criteria" by Hjort, N. and Claeskens, G. J. Amer. Stat. Assoc., 98, 922-925. pdf
  27. Ishwaran, H. and James, L.F. (2003). Generalized weighted Chinese restaurant processes for species sampling mixture models. Statistica Sinica, 13, 1211-1235. pdf
  28. Ishwaran, H. and Zarepour, M. (2003). Random probability measures via Pólya sequences: revisiting the Blackwell-MacQueen urn scheme. ArXiv:math.PR/030904.
  29. Ishwaran, H. and Rao, J.S. (2003). Detecting differentially expressed genes in microarrays using Bayesian model selection. J. Amer. Stat. Assoc., 98, 438-455. pdf
  30. Alexe, S., Blackstone, E.H., Hammer, P. L, Ishwaran, H. Lauer, M.S. and Pothier, C.E. (2003). Coronary risk prediction by logical analysis of data. Annals of Operations Research, 119, 15-42. pdf
  31. Ishwaran, H. and James, L.F. (2003). Some further developments for stick-breaking priors: finite and infinite clustering and classification. Sankhya Series A, 65, 577-592. pdf
  32. Ishwaran, H. and Zarepour, M. (2002). Dirichlet prior sieves in finite normal mixtures. Statistica Sinica 12, 941-963. pdf
  33. Lauer M.S., Alexe S., Pothier C.E., Blackstone E.H., Ishwaran H., Hammer P.L. (2002). Use of the "Logical Analysis of Data'' method for assessing long-term mortality risk after exercise electrocardiography. Circulation, 106, 685 - 690. pdf
  34. Ishwaran, H. and Zarepour, M. (2002). Exact and approximate sum-representations for the Dirichlet process. Can. J. Statist. 30, 269-283. pdf
  35. Banjevic, D., Ishwaran, H. and Zarepour, M. (2002). A recursive method for functionals of Poisson processes. Bernoulli 8, 295-311. ps
  36. Siegel, M.J., Ishwaran, H., Fletcher, B.D., Meyer, J., Hoffer, F.A., Jaramillo, D., Hernandez, R., Siegel, B.A., Caudry, D.J., McNeil, B.J. (2002). Staging of neuroblastoma at imaging: Report of the radiology diagnostic oncology group. Radiology 223, 168-175. pdf
  37. Ishwaran, H. and Takahara, G. (2002). Independent and identically distributed Monte Carlo algorithms for semiparametric linear mixed models. J. Amer. Stat. Assoc. 97, 1154-1166. pdf
  38. Ishwaran, H. and James, L.F. (2002). Approximate Dirichlet process computing in finite normal mixtures: smoothing and prior information. J. Comp. Graph. Statist. 11, 508-532. pdf
  39. Ishwaran, H., James, L.F. and Sun, J. (2001). Bayesian model selection in finite mixtures by marginal density decompositions. J. Amer. Stat. Assoc. 96, 1316-1332. pdf
  40. Ishwaran, H. and James, L.F. (2001). Gibbs sampling methods for stick-breaking priors. J. Amer. Stat. Assoc. 96, 161-173. pdf
  41. Ishwaran, H. (2000). Univariate and multirater ordinal cumulative link regression with covariate specific cutpoints. Can. J. Statist., 28, 715-730. pdf
  42. Ishwaran, H. and Gatsonis, C. (2000). A general class of hierarchical ordinal regression models with applications to correlated ROC analysis. Can. J. Statist., 28, 731-750. pdf
  43. Ishwaran, H. (2000). Inference for the random effects in Bayesian generalized linear mixed models. ASA Proceedings of the Bayesian Statistical Science Section, pp 1-10. ps
  44. Ishwaran, H. and Zarepour, M. (2000). Markov chain Monte Carlo in approximate Dirichlet and beta two-parameter process hierarchical models. Biometrika, 87, 371-390. pdf
  45. Ishwaran, H. (1999). Applications of hybrid Monte Carlo to Bayesian generalized linear models: quasicomplete separation and neural networks. J. Comp. Graph. Statist., 8, 779-799. ps
  46. Ishwaran, H. (1999). Information in semiparametric mixtures of exponential families. Ann. Statist., 27, 159-177. pdf
  47. Ishwaran, H. (1998). Exponential posterior consistency via generalized Pólya urn schemes in finite semiparametric mixtures. Ann. Statist., 26, 2157-2178. pdf
  48. Curtin, H.D., Ishwaran, H., Mancuso, A.A., Dalley, R.W., Caudry, D.J., McNeil, B.J. (1998). Comparison of CT and MR in staging of neck metastases. Radiology, 207, 123-130.
  49. Ishwaran, H. (1998). Discussion to "Markov chain Monte Carlo: some practical implications of theoretical results," by G.O. Roberts and J.S. Rosenthal. Can. J. Statist., 26, 20-27. pdf
  50. Ishwaran, H. (1996). Identifiability and rates of estimation for scale parameters in location mixture models. Ann. Statist., 24, 1560-1571. pdf
  51. Ishwaran, H. (1996). Uniform rates of estimation in the semiparametric Weibull mixture model. Ann. Statist., 24, 1572-1585. pdf

Technical Reports and Unpublished Papers

  1. Ishwaran, H., James, L.F. and Lo, A.Y. (2001). Generalized weighted Chinese restaurant and SIS stick-breaking algorithms for semiparametric models. Manuscript.
  2. Ishwaran, H. (1998). Bayesian generalized linear models with artificial neural networks: a hybrid Monte Carlo approach. Technical Report 317 of the Laboratory for Research in Statistics and Probability, Carleton University and University of Ottawa.
  3. Ishwaran, H. and Gatsonis, C. (1996). Mixture models for the link function in ordinal regression, with applications to correlated ROC analysis. Technical Report 289 of the Laboratory for Research in Statistics and Probability, Carleton University and University of Ottawa.
  4. Ishwaran, H., Shaywitz, B.A., Francis, D., Fletcher, J. M., Escobar, M., Holahan, J., and Shaywitz, S. E. (1992). Changes in IQ/achievement discrepancy scores in Grades 1-8: a structural equations approach to understanding variability.

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