GARCH Model

Auto Regressive Conditional Heteroskedasticity (ARCH) is an econometric model employed to find dependency of current error variance on the squares of model errors for previous observations.

If autoregressive members are used to describe error variance, this model is described as Generalized Auto Regressive Conditional Heteroskedasticity (GARCH).

Parameters of GARCH(pq) model are estimated:

Where:

To calculate conditional variance ht, the user can use one of the following equations:

Where γ - skewness parameter.

Available models are:

See also:

ISmGARCH | Library of Methods and Models