The actual source is Milanovic's book (which you'd know if you read the NYT article), but that's $12 on kindle: http://amzn.to/1VSdMU5 http://amzn.to/1VSdMU5 I

The actual source is Milanovic's book (which you'd know if you read the NYT article), but that's $12 on kindle: http://amzn.to/1VSdMU5 http://amzn.to/1VSdMU5 I spent a few minutes googling hoping to find something academic by the same author, but didn't look as carefully as I should have. But since you've called me out, I dug up my copy of the book. Apparently this paper is the original source and it uses 2005 data: https://www.gc.cuny.edu/CUNY_GC/media/CUNY-Graduate-Center/PDF/Centers/LIS/Milanovic/papers/2012/gpol_170.pdf https://www.gc.cuny.edu/CUNY_GC/media/CUNY-Graduate-Center/P... No idea where to get the most current data.