ADF_FL                  Augmented Dickey-Fuller Statistic
ADF_IC                  Augmented Dickey-Fuller Statistic by AIC or BIC
DGP                     Random walk.
badf                    Backward Augmented Dickey-Fuller Sequence.
bsadf                   Critical values for backward SADF statistic
                        sequence.
gsadf                   Critical values for generalized sup ADF
                        statistic sequence.
sadf                    Critical values for sup ADF statistic sequence.
sadf_gsadf              Sup ADF and generalized sup ADF statistics for
                        a time series.
sp_data                 S&P 500 data.
