While evidence points to the success of factor - based investing over the long - term, we do caution that there is cyclical behavior associated with smart beta. (pnc.com)
Right during and after the 2005 hurricane season the most common media explanation was that hurricane activity had a 20 - to 30 - year cyclical behavior that was dependent on the North Atlantic Oscillation. (realclimate.org)
If you think that the cause of the SST anomaly is unknown, then you can't disprove a GW link any more than you can prove cyclical behavior. (realclimate.org)