Economic futurist Harry Dent's predictive model takes into account long term cycles based on the population peaks that follow baby booms. As other researchers have revealed, history repeats a cycle beginning with a baby boom (eg after WWII) and after the spending of these  boomers peaks at age 46, there is a decline in spending. Anither facor is the 29-30 year commodity price cycle.

This video is primarily directed to Australians but the main theme has global application.