mai said:
1) Higher res, no? 2) Methodology? In other words, does the change represent actual change of the poor or relative value of $? 3) Here's better pciture to see the dynamics, since a joule hundreed years ago is the same joule today, adjust if for Gini. Of course, you don't eat them but convert them into food, heat etc.
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1.)
2. Yes, it explicitly says it is adjusted for inflation and PPP.