GARCH estimates using the 186 observations 1960:3-2006:4
Dependent variable: rGDPyoy
QML standard errors

      VARIABLE       COEFFICIENT        STDERROR      T STAT   P-VALUE

  const                 3.86995          0.178010     21.740  <0.00001 ***
  KRWI_1               -1.36415          0.593954     -2.297   0.02163 **
  KRWI_2               -1.85474          0.380043     -4.880  <0.00001 ***

  alpha(0)              0.310355         0.169150      1.835   0.06654 *
  alpha(1)              0.818610         0.140337      5.833  <0.00001 ***
  beta(1)               0.240825         0.110297      2.183   0.02900 **

  Mean of dependent variable = 3.35807
  Standard deviation of dep. var. = 2.24918
  Unconditional error variance = nan
  Log-likelihood = -350.875
  Akaike information criterion (AIC) = 715.749
  Schwarz Bayesian criterion (BIC) = 738.329
  Hannan-Quinn criterion (HQC) = 724.899