how can I set lag in root what is truncation of lag kpss lag truncation which parameter is set for a kpss unit root test? where is the lag truncation in the kpss unit root test set? how should i set the lag truncation for kpss unit root test what is lag truncation in kpss kpss unit root lag test parameter how to set lag truncation in test what is lag truncation how to set lag truncation parameter for unit root test setting the lag truncation parameter for kpss root test to be used for lag testing when setting lag test what truncation parameter for root tests kpss unit test lag test how to set lag truncation what setting should i set for lag truncations how to set lag to truncated how should i test my kpss root test setting lag truncation