Ram Tripathi is professor of statistics in the Department of Management Science and Statistics at The University of Texas at San Antonio. He is associate editor of Communications in Statistics. He is a Fellow of the American Statistical Association. He has published papers on the development and applications of models for count data in major statistical journals such as the Journal of the American Statistical Association, Journal of the Royal Statistical Society, Sankhya, Journal of Statistical Planning and Inference, Communications in Statistics and Computational Statistics and Data Analysis.
He was a visiting Research Scientist at Brooks Air Force Base during 1985-1987 and 1993-1995 under a grant from the Air Force Office of Scientific Research (AFOSR). He also had frequent summer grants with the AFOSR. During these visits, he worked on the Air Force Health Study which investigated the adverse health effects of dioxin on the US Air Force Vietnam veterans. Under this project, he developed methodology for analyzing data on exposure of humans to contaminants, especially to dioxin. These results appear in a series of articles in Journal of Toxicology and Environmental Health, American Journal of Epidemiology, Environmetrics, Journal of Exposure Analysis and Environmental Epidemiology, Statistics in Medicine and American Journal of Epidemiology. He has published about 50 research articles in major statisticaljournals. He has contributed four articles by invitation on special topics on count data in the Encyclopedia of Statistical Sciences. Recently, he also published articles in the area of survival analysis.
- Models for count data
- Inflated models
- Statistical inference
- Survival analysis
“Some Non-parametric Precedence-type Tests Based on Progressively Censored Samples and Evaluation of Power,”
with N. Balakrishnan, N. Kannan and H. K. T. Ng, Journal of Statistical Planning and Inference, Vol. 140,
2010, pp. 559-573.
“On the Joint Distribution of Placement Statistics Under Progressive Censoring and Applications to Precedence Test,”
with N. Balakrishnan and N. Kannan, Journal of Statistical Planning and Inference, Vol. 138, 2008,
“Score Test for Zero Inflated Generalized Poisson Regression Model,” with P. Gupta and R. Gupta, Communications in Statistics, Vol. A33, 2004, pp. 47-64.
“Maximum Likelihood Estimation for Longitudinal Data with Truncated Observations,” with K. Mehrotra, P. Kulkarni and J. Michalek, Statistics in Medicine, Vol. 19, 2000, pp. 2975-2988.