# 15-131/III (2015-12-11)

Author(s)
Francisco Blasques, VU University Amsterdam, the Netherlands; Paolo Gorgi, VU University Amsterdam, the Netherlands, University of Padua, Italy; Siem Jan Koopman, VU University Amsterdam, the Netherlands, Aarhus University, Denmark; Olivier Wintenberger, University of Copenhagen, Denmark, Sorbonne Universités, UPMC University Paris, Sorbonne Universities, France
Keywords:
invertibility, quasi-maximum likelihood estimator, volatility models
JEL codes:
C01, C22, C51

We revisit Wintenberger (2013) on the continuous invertibility of the EGARCH(1,1) model. We note that the definition of continuous invertibility adopted in Wintenberger (2013) may not always be sufficient to deliver strong consistency of the QMLE. We also take the opportunity to provide other small clarifications and additions.