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Journal Article Real GDP Per Capita for More Than One Hundred Countries Get access Irving B. Kravis, Irving B. Kravis University of Pennsylvania Search for other works by this author on: Oxford Academic Google Scholar Alan W. Heston, Alan W. Heston University of Pennsylvania Search for other works by this author on: Oxford Academic Google Scholar Robert Summers Robert Summers University of Pennsylvania Search for other works by this author on: Oxford Academic Google Scholar The Economic Journal, Volume 88, Issue 350, 1 June 1978, Pages 215–242, https://doi.org/10.2307/2232127 Published: 01 June 1978
Kravis et al. (Thu,) studied this question.