Econometrica: Mar 2004, Volume 72, Issue 2
Asymptotic Normality of the QMLE Estimator of ARCH in the Nonstationary Case
Søren Tolver Jensen, Anders RahbekWe establish consistency and asymptotic normality of the quasi‐maximum likelihood estimator in the linear ARCH model. Contrary to the existing literature, we allow the parameters to be in the region where no stationary version of the process exists. This implies that the estimator is always asymptotically normal.
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