Saman Mousazadeh - Shiraz University-Shiraz-Iran
Mahmood Karimi - Shiraz University-Shiraz-Iran

This paper discusses the asymptotic properties of two-stage least-squares (TSLS) estimator of the parameters of multivariate autoregressive conditional heteroscedasticity (ARCH) model. The estimator is easy to obtain since it involves solving sets of linear equations. It will be shown that, under som conditions, this TSLS estimator is asymptotically consistent and its rate of convergence is the same as that of quasi maximum likelihood estimator (QMLE). At the same time, the computational load of TSLS estimator is extremely lower than that of QMLE. The performance of the TSLS estimator will be evaluated and compared with QMLE using simulations. Simulation results show that the performances of the two estimators are comparable even for small data records.

Multivariate ARCH, Parameter estimation, QMLE, TSLS