age at death nonstationary age at death - nonstationary age at death in a sample age at death plots age at death data set age at death nonstationary data when is age at death measured age of death in a nonstationary time series age at death age how can you compare age at death age at death cohort a age at death stata age at death nonstationary when do age increases occur when does age at death trend age at death plot how to compare age at death age at death age distribution age at death data age at death nonstationary