The GDPs of all countries are from Summers, Robert and Heston, Alan, “A different Set of Intercontinental Comparisons of Serious Products and Cost Level Estimates for one hundred thirty Nations around the world, 1950–1985,” Review of Revenue and Prosperity 34 (03 1988), pp. 1–26CrossRefGoogle Scholar. These estimates are based https://mancur8829516.blogmazing.com/29845041/5-essential-elements-for-mancur-88