A Long Memory Model with Normal Mixture GARCH
Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal
|Journal / Publication||Computational Economics|
|Publication status||Published - Nov 2011|
|Link to Scopus||https://www.scopus.com/record/display.uri?eid=2-s2.0-80054050137&origin=recordpage|
We present an exploratory analysis of a class of long memory models with a normal mixture generalized autoregressive conditional heteroskedasticity innovation process. Monte Carlo results are used to infer the performance of the maximum likelihood estimator. The estimation biases are associated with, amongst others, the mixing parameter, and these biases are usually insignificant. As an illustration, we fit the proposed model to four countries inflation data. It is found that the performance of the long memory model with normal mixture generalized autoregressive conditional heteroskedasticity is better than, say, both autoregressive moving average and long memory models with a standard generalized autoregressive conditional heteroskedasticity specification in terms of the flexibility to describe both the time-varying conditional skewness and kurtosis. © 2011 Springer Science+Business Media, LLC.
- Conditional heteroskedasticity, Inflation rate, Long memory, Normal mixture