Vancouver: "City housing planner Matthew Bourke said there doesn't appear to be a correlation between empty homes and housing prices, given that the vacancy rate remained flat while prices skyrocketed.... Bourke told council that about 70 per cent of single-family homes marked as vacant in 2014 were found to be waiting for a renovation permit." 12.5 * 0.7 = 3.75% (this can't be directly compared to other vacancy numbers, though).

Manhattan: Unsold != unoccupied.

Melbourne: Now we're cherrypicking districts that have less than 15,000 residents total in a city of 5 million in one specific year? This is essentially p-hacking to support a non-existent narrative.

https://en.wikipedia.org/wiki/Cardinia,_Victoria

https://en.wikipedia.org/wiki/Clyde,_Victoria

https://en.wikipedia.org/wiki/Docklands,_Victoria

Boston: "could remain largely empty." This is speculation. Where is the data?