The Annals of Statistics

Efficient estimation of copula-based semiparametric Markov models

Xiaohong Chen, Wei Biao Wu, and Yanping Yi

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Abstract

This paper considers the efficient estimation of copula-based semiparametric strictly stationary Markov models. These models are characterized by nonparametric invariant (one-dimensional marginal) distributions and parametric bivariate copula functions where the copulas capture temporal dependence and tail dependence of the processes. The Markov processes generated via tail dependent copulas may look highly persistent and are useful for financial and economic applications. We first show that Markov processes generated via Clayton, Gumbel and Student’s t copulas and their survival copulas are all geometrically ergodic. We then propose a sieve maximum likelihood estimation (MLE) for the copula parameter, the invariant distribution and the conditional quantiles. We show that the sieve MLEs of any smooth functional is root-n consistent, asymptotically normal and efficient and that their sieve likelihood ratio statistics are asymptotically chi-square distributed. Monte Carlo studies indicate that, even for Markov models generated via tail dependent copulas and fat-tailed marginals, our sieve MLEs perform very well.

Article information

Source
Ann. Statist., Volume 37, Number 6B (2009), 4214-4253.

Dates
First available in Project Euclid: 23 October 2009

Permanent link to this document
https://projecteuclid.org/euclid.aos/1256303542

Digital Object Identifier
doi:10.1214/09-AOS719

Mathematical Reviews number (MathSciNet)
MR2572458

Zentralblatt MATH identifier
1191.62140

Subjects
Primary: 62M05: Markov processes: estimation
Secondary: 62F07: Ranking and selection

Keywords
Copula geometric ergodicity nonlinear Markov models semiparametric efficiency sieve likelihood ratio statistics sieve MLE tail dependence value-at-risk

Citation

Chen, Xiaohong; Wu, Wei Biao; Yi, Yanping. Efficient estimation of copula-based semiparametric Markov models. Ann. Statist. 37 (2009), no. 6B, 4214--4253. doi:10.1214/09-AOS719. https://projecteuclid.org/euclid.aos/1256303542


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