Last month, we talked about how even "luxury" housing can improve overall housing affordability in a market. In that post, we spoke about a recent study that looked at the downstream effects of a new condominium tower in Honolulu. Today, let's look at Switzerland.
I stumbled upon this working paper on Twitter. The authors are Lukas Hauck and Frédéric Kluser, both from the University of Bern. In it, they look at the country-wide effects of new residential housing supply in Switzerland and, more specifically, the "moving chain" that new supply produces.
Moving chains work generally as follows:
A household moves into a newly constructed home
Their previous home becomes vacant
Another household moves into this vacant unit, leaving their previous home vacant
And the process continues, until someone breaks the chain (which can happen by way of a new household being formed or someone moving in from out of the market)
The authors found that these moving chains are relatively short in Switzerland. Approximately 75% of them terminate within three migration rounds. But this doesn't mean that these chains aren't critical for the market.
Importantly, they found that every new market-rate unit typically results in 0.75 moves for households with below-median incomes. So, that is 75 moves for every 100 new homes constructed.
The reason why new supply ends up also benefiting lower-income households is because there's a clear income and rent gradient across the moving chain:
