Odd Aalen
Encyclopedia
Odd Olai Aalen is a Norwegian
statistician
and is a professor at the Department of Basic Medical Sciences at the University of Oslo
.
His research work is geared towards applications in bioscience
s. 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 leader of the Centre for Biostatistical Modelling in the Medical Sciences at the Faculty of Medicine at the University of Oslo
. He is an elected member of the Norwegian Academy of Science and Letters
.
Norway
Norway , officially the Kingdom of Norway, is a Nordic unitary constitutional monarchy whose territory comprises the western portion of the Scandinavian Peninsula, Jan Mayen, and the Arctic archipelago of Svalbard and Bouvet Island. Norway has a total area of and a population of about 4.9 million...
statistician
Statistician
A statistician is someone who works with theoretical or applied statistics. The profession exists in both the private and public sectors. The core of that work is to measure, interpret, and describe the world and human activity patterns within it...
and is a professor at the Department of Basic Medical Sciences at the University of Oslo
University of Oslo
The University of Oslo , formerly The Royal Frederick University , is the oldest and largest university in Norway, situated in the Norwegian capital of Oslo. The university was founded in 1811 and was modelled after the recently established University of Berlin...
.
His research work is geared towards applications in bioscience
BioScience
BioScience is a peer-reviewed monthly sometimes daily scientific journal that is published by the American Institute of Biological Sciences . The content is written and edited for accessibility to researchers, educators, and students alike...
s. Aalen's early work on counting processes and martingales
Martingale (probability theory)
In probability theory, a martingale is a model of a fair game where no knowledge of past events can help to predict future winnings. In particular, a martingale is a sequence of random variables for which, at a particular time in the realized sequence, the expectation of the next value in the...
, starting with his 1976 Ph.D. thesis at the University of California, Berkeley
University of California, Berkeley
The University of California, Berkeley , is a teaching and research university established in 1868 and located in Berkeley, California, USA...
, has had profound influence in biostatistics
Biostatistics
Biostatistics is the application of statistics to a wide range of topics in biology...
. Inferences for fundamental quantities associated with cumulative hazard rates, in survival analysis
Survival analysis
Survival analysis is a branch of statistics which deals with death in biological organisms and failure in mechanical systems. This topic is called reliability theory or reliability analysis in engineering, and duration analysis or duration modeling in economics or sociology...
and models for analysis of event histories, are typically based on the Nelson–Aalen estimator
Nelson–Aalen estimator
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 a failure of a...
or appropriate related statistics. The Nelson–Aalen estimator
Nelson–Aalen estimator
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 a failure of a...
is related to the Kaplan-Meier estimator
Kaplan-Meier estimator
The Kaplan–Meier estimator, also known as the product limit estimator, is an estimator for estimating the survival function from life-time data. In medical research, it is often used to measure the fraction of patients living for a certain amount of time after treatment. In economics, it can be...
and generalisations thereof.
Aalen is currently leader of the Centre for Biostatistical Modelling in the Medical Sciences at the Faculty of Medicine at the University of Oslo
University of Oslo
The University of Oslo , formerly The Royal Frederick University , is the oldest and largest university in Norway, situated in the Norwegian capital of Oslo. The university was founded in 1811 and was modelled after the recently established University of Berlin...
. He is an elected member of the Norwegian Academy of Science and Letters
Norwegian Academy of Science and Letters
The Norwegian Academy of Science and Letters is a learned society based in Oslo, Norway.-History:The University of Oslo was established in 1811. The idea of a learned society in Christiania surfaced for the first time in 1841. The city of Throndhjem had no university, but had a learned...
.