Like all economic theory you have to make some assumptions.
1. Demographics in Japan and USA are the same as OZ - they are not 2. The economies are the same. Both USA and Japan are different to ours in that they are more mature. 3. Our graph will follow the pattern of 2 randomly chosen countries one of which has not braced reform and the other incredibly burdened with debt. 4. The majority of readers are gullible enough to believe economics is a science - why have none of the economists ever predicted the booms in real estate. 5. People are drawn by negativity.
Give a title to a guy like professor and we are all dumbstruck by academia when my experience at Uni proved that the real achievers are often those in industry etc who have vision - and yes I might add have a thing called nous. This is an opinion only and it may go that way and it may not as will all chartist bs. They never have to account for their hypothesis.