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Urban Concentration: The Role of Increasing Returns and Transport Costs Get access Paul Krugman Paul Krugman Search for other works by this author on: Oxford Academic Google Scholar The World Bank Economic Review, Volume 8, Issue suppl₁, December 1994, Pages 241–263, https: //doi. org/10. 1093/wber/8. suppl₁. 241 Published: 01 December 1994
Paúl Krugman (Sat,) studied this question.