I am interested in your demographical links with housing price and bubble burst, although I am a bit suspicious of your conclusion.
There are many factors that influence the housing price in a country, not just demography, as you also acknowledge. Then why will demography inevitably causing bubbles and also their burst?
It appears to me your casual links are no more than spurious observations, to just borrow a terminology from econometrics.
But I am open to any arguments to prove that I am wrong and you are correct.