Do We Really Need Both BEKK and DCC? A Tale of Two Multivariate GARCH Models

Do We Really Need Both BEKK and DCC? A Tale of Two Multivariate GARCH Models

Discussion Papers are a series of manuscripts in their draft form. They are not intended for circulation or distribution except as indicated by the author. For that reason Discussion Papers may not be reproduced or distributed without the written consent of the author. for financial support. This is an abridged and revised version of a paper entitled " Do we really need both BEKK and DCC? A tal...

Stationarity and Geometric Ergodicity of BEKK Multivariate GARCH Models

Conditions for the existence of strictly stationary multivariate GARCH processes in the so-called BEKK parametrisation, which is the most general form of multivariate GARCH processes typically used in applications, and for their geometric ergodicity are obtained. The conditions are that the driving noise is absolutely continuous with respect to the Lebesgue measure and zero is in the interior o...

vitamin and mineral supplements: do we really need them?

in the united states, 40 – 50% of the men and women 50 years of age or older regularly use multivitamin/mineral (mvm) supplements, making the annual sales of these supplements over $11 billion. however, the question remains whether using mvm supplements is beneficial to health. this article reviews the results of randomized studies of mvm supplements and individual vitamins/mineral supplements ...

Do We Really Need Consultants?

Do we really need more biomarkers?