We consider the parameter estimation of Markov chain when the unknown transition matrix belongs to an exponential family of transition matrices. Then, we show that the sample mean of the generator of the exponential family is an asymptotically efficient estimator. Further, we also define a curved exponential family of transition matrices. Using a transition matrix version of the Pythagorean theorem, we give an asymptotically efficient estimator for a curved exponential family.
Information geometry approach to parameter estimation in Markov chains
Masahito Hayashi,Shun Watanabe
Published 2014 in 2014 IEEE International Symposium on Information Theory
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- Publication year
2014
- Venue
2014 IEEE International Symposium on Information Theory
- Publication date
2014-01-16
- Fields of study
Mathematics, Computer Science
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