I think the comparisons could also use some normalization with respect to per capita income (mean, mode, median?). 1 USD in the US doesn't mean the same thing a

I think the comparisons could also use some normalization with respect to per capita income (mean, mode, median?). 1 USD in the US doesn't mean the same thing as 1 USD in China. From the consumers' perspective, it's about affordability, not absolute cost.