17-09-2026
The Center of Mathematics and Applications (NOVA Math) promotes the Seminar of Statistics and Risk Management with the title: "Bivariate models involving independent gamma distributed components". Barry C. Arnold (Department of Statistics, University of California, Riverside, USA) is the speaker.
Abstract: Several multivariate models involving independent gamma distributed components (three of which are new) are described. The flexible bivariate beta(2) model introduced by Arnold and Ng (2011) provides the template for the other models. It involved ratios of sums of independent gamma variables. The other models involve differences, sums, products and minima rather than ratios.
Short Bio: Barry C. Arnold is Distinguished Professor Emeritus at the Department of Statistics, University of California, Riverside, USA. He received his Ph.D. in Statistics from Stanford University in 1965. He has authored 14 books and more than 300 research papers in reputed peer-reviewed journals and contributed volumes. Professor Arnold has guided 17 Ph.D. scholars and has been on editorial boards of renowned journals. His research interests include estimation theory, probability, stochastic processes, mathematical learning models, biological models, characterizations, income distributions, order statistics, inequality measurement, record values, conditionally specified distributions, and Bayesian inference. He has been invited for scholarly lectures from across the world and is recognized by American Statistical Association, USA (Fellow); American Association for the Advancement of Science, USA (Fellow); Institute of Mathematical Statistics, USA (Fellow); Royal Statistical Society, UK (Fellow); International Statistical Institute, the Netherlands (Elected Member). He also received, in December 2023 an honorary doctorate from the Colegio de Postgraduados, Montecillo, Mexico.
23rd September 2026, 14h30 - Auditorium Manuel Laranjeira - Building I.
