Any forecast that property prices are going to rise ahead of wages over the long term is optimistic. Shiller's research showed that rises tend to be inline with inflation.
As a simple example, I believe Australian wages have been growing around 3% to 4% a year for the last decade, and house price inflation has tended to be 7% to 10%. Taking the extreme ends of that would mean property becomes roughly twice as expensive per decade. If we start at a median price of four times earnings...
- Year 0: 4 times
- Year 10: 8 times
- Year 20: 16 times
- Year 30: 32 times
- Year 40: 64 times
- Year 50: 128 times
- Year 60: 256 times
- Year 70: 512 times
- Year 80: 1024 times
Most people don't grasp the implications of compounding returns, as it ends up as an exponential series.
So what do I think could happen?
In my opinion the bullish case would be that prices remain flat in real terms, perhaps rising by 3% or so in nominal terms. Roughly what Sydney has been doing for the last decade.
Basically demand is underpinned by what an individual can afford to pay, and if values are stretched relative to wages then there isn't the money to bid things up further.
The only possible driver at that point would be foreign buyers entering the market in numbers, which you're seeing in London and Australia. The problem with that is that voters who're increasingly priced out start to get uppity at that point, and eventually politicians pay attention. It's starting to happen in London, but I don't think it's crossed a sufficient tipping point to change things.
The bear case would be that there are steep falls in property prices to the point that an average house is affordable on an average wage, and the cost of renting is broadly similar to buying.
If that happens you'd be looking at a pretty serious recession, banks getting into trouble, and various other upsets. A lot of the bears on the Global House Price Crunch forums think that any reset will be painless, but I think that they're being overly optimistic.
I agree with Deltaberry's comments above, but in a world of 3% or 4% growth, it's going to be very, very difficult to make spectacular returns.