A series in which the historical trend asymmetric errors, even when expressed in logs (Armstrong and Collopy 2000). See Armstrong, Adya and Collopy (2001).
- Armstrong, J. S. & F. Collopy (1993), “Causal
forces: Structuring knowledge for time-series extrapolation,” Journal of
Forecasting, 12, 103-115. (Full
- Armstrong, J. S. & F. Collopy (2001),
“Identification of asymmetric prediction intervals through causal forces,”
Journal of Forecasting (forthcoming).
- Armstrong, J. S., M. Adya & F. Collopy (2001),
“Rule-based forecasting: Using judgment in time-series extrapolation,” in J. S. Armstrong
(ed.), Principles of Forecasting. Norwell, MA: Kluwer Academic