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Odd Aalen | |
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| Born | May 6, 1947 Oslo, Norway |
| Nationality | Norwegian |
| Education | University of Oslo University of California, Berkeley |
| Occupation(s) | Statistician, professor |
| Scientific career | |
| Institutions | University of Oslo |
| Doctoral advisor | Lucien Le Cam |
Odd Olai Aalen (born 6 May 1947, in Oslo) is a Norwegian statistician and a professor at the Department of Biostatistics at the Institute of Basic Medical Sciences at the University of Oslo. [1]
Aalen completed his examen artium in 1966 at Oslo Cathedral School before studying first mathematics and physics and then statistics in which he graduated at the University of Oslo in 1972. [2]
His research work is geared towards applications in biosciences. Aalen's early work on counting processes and martingales, starting with his 1976 Ph.D. thesis at the University of California, Berkeley, has had profound influence in biostatistics. Inferences for fundamental quantities associated with cumulative hazard rates, in survival analysis and models for analysis of event histories, are typically based on the Nelson–Aalen estimator or appropriate related statistics. The Nelson–Aalen estimator is related to the Kaplan-Meier estimator and generalisations thereof.
Aalen is currently professor emeritus at the Oslo Centre for Biostatistics and Epidemiology at the Faculty of Medicine at the University of Oslo.
He is an elected member of the Norwegian Academy of Science and Letters. [3]
Alain Connes is a French mathematician, known for his contributions to the study of operator algebras and noncommutative geometry. He is a professor at the Collège de France, Institut des Hautes Études Scientifiques, Ohio State University and Vanderbilt University. He was awarded the Fields Medal in 1982.
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The Nelson–Aalen estimator is a non-parametric estimator of the cumulative hazard rate function in case of censored data or incomplete data. It is used in survival theory, reliability engineering and life insurance to estimate the cumulative number of expected events. An "event" can be the failure of a non-repairable component, the death of a human being, or any occurrence for which the experimental unit remains in the "failed" state from the point at which it changed on. The estimator is given by
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For the American musician, see Wayne Nelson.
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