Portmanteau Goodness-of-Fit Test for Asymmetric Power GARCH Models
DOI:
https://doi.org/10.17713/ajs.v40i1&2.197Abstract
The asymptotic distribution of a vector of autocorrelations of squared residuals is derived for a wide class of asymmetric GARCH models. Portmanteau adequacy tests are deduced. These results are obtained under moment assumptions on the iid process, but fat tails are allowed for the observed process, which is particularly relevant for series of financial returns. A Monte Carlo experiment and an illustration to financial series are also presented.References
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