Moment based regression algorithms for drift and volatility estimation in continuous-time Markov switching models  

Oleh:

Elliot, Robert J. ; Krishnamurthy, Vikram ; Sass, Jorn

Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: The Econometrics Journal vol. 11 no. 2 (2008), page 244-270.
Topik: Generalized Method of Moments; Markov Switching Model; Moments Based Estimator; Parameter Estimation; Regime Switching
Fulltext: 244.pdf (199.78KB)

Ketersediaan

Perpustakaan Pusat (Semanggi) Nomor Panggil: EE39.4 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

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We consider a continuous time Markov switching model (MSM) which is widely used in mathematical finance. The aim is to estimate the parameters given observations in discrete time. Since there is no finite dimensional filter for estimating the underlying state of the MSM, it is not possible to compute numerically the maximum likelihood parameter estimate via the well known expectation maximization (EM) algorithm. Therefore in this paper, we propose a method of moments based parameter estimator. The moments of the observed process are computed explicitly as a function of the time discretization interval of the discrete time observation process. We then propose two algorithms for parameter estimation of the MSM. The first algorithm is based on a least-squares fit to the exact moments over different time lags, while the second algorithm is based on estimating the coefficients of the expansion (with respect to time) of the moments. Extensive numerical results comparing the algorithm with the EM algorithm for the discretized model are presented.

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