Bent Jørgensen (statistician)
| Bent Jørgensen | |
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| Born | 15 April 1954 |
| Died | November 19, 2015 (aged 61) |
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Bent Jørgensen (April 15, 1954 – November 19, 2015) was a Danish statistician from the University of Southern Denmark whose research was focused on two related topics in statistics: dispersion models and the analysis of non-normal correlated data.
Jørgensen studied statistics and was conferred a Cand. Scient. degree in 1979 from Aarhus University followed by a Ph.D. in 1987 (Odense University) and Dr. Scient. in 1997 (Aalborg University). In 1987 he joined the Instituto de Matemática Pura e Aplicada at Rio de Janeiro, and from 1992 to 1997 he was affiliated with the University of British Columbia in Canada. His subsequent appointments were with Odense University and the University of Southern Denmark.
Dispersion models serve as error distributions for generalized linear models and represent a broad class of distributions that allow for the analysis of data that go beyond the restrictions of the normal distribution. These models include both the proper dispersion models and the exponential dispersion models.
Jørgensen identified a number of other classes of dispersion models which included the multivariate dispersion models, the dispersion models for extremes and the dispersion models for geometric sums.
He had an interest in a class of exponential dispersion models identified by Maurice Tweedie characterized by closure under additive and reproductive convolution as well as under transformations of scale that are now called the Tweedie distributions. These models express a power law relationship between the variance and the mean which manifests in ecological systems where it is known as Taylor's law and in physical systems where it is known as fluctuation scaling.
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