"And so it's possible that the effects that we have reported may be a conservative estimate, and that the odds of survival associated with high-quality relationships may actually be larger."

VOA: standard.2010.07.29

These are the only countries that I've been able to find that have high-quality, repeat sales price indexes going back a hundred years.

只有这三个国家,在100年前就已经出现,优质的重复销售价格指数

耶鲁公开课 - 金融市场课程节选