Reminder: top 10% richest worldwide seem (from my 10s. google search [1]) to amount to around $100k net worth, so for many people there, it's not them, its' us. 1% is around $1M net worth.
This is extremely important. Most people have a very skewed perspective on what it means to be in the global 10% or 1%. I think this paper would be much more impactful if the authors listed the calculations used for defining these groups in the Methods section. Ideally the cutoff for each group should even be in the abstract so people can understand what 1% or 10% even means.
[1] https://www.cnbc.com/2018/11/01/how-much-money-you-need-to-b...