The Canadian government still doesn’t officially track vacancies, but they did start tracking which dwellings were “occupied” since 2001.
Unfortunately, we don’t have any data for what life was like before HGTV convinced everyone flipping a home is incredibly profitable, but we’ll work with what we’ve got.
Academics have been subtracting the total number of private dwellings from the number of occupied homes to determine how many are “not occupied.” This gives us the ratio of homes that are sitting vacant or occasionally occupied.
点评：
1. 迄今没有空置房的官方数据；
2. 报道的所谓数据是所谓学术估算（subtracting the total number of private dwellings from the number of occupied homes），但这个数据是有很大问题的。首先，相当数量的中产阶级除了主要住宅之外，还有度假小屋。按这个算法就算空置了。第二，这个所谓学术单位是怎么弄到 occupied homes 的数量？这个关键数据的来源没有说明。
3. 即使拿这个“学术数据”来看，2001年“空置率”为 7.875%， 2016年也才 8.63% 左右，即使他们用了一个大比例尺的图标使这个变化看上去很吓人，但实际的增长 15年也才0.75% 左右。2001年时，有人大谈加拿大房市崩塌吗？如果那时没有，上涨了 0.75% 就崩塌了？