Search for: [References = %22Romer P.M.%2C 1990%2C Endogenous Technological Change%2C Quarterly Journal of Economics%2C 98%2C s. 71%5C-102. https%5C:%5C%2F%5C%2Fdoi.org%5C%2F10.1086%5C%2F261725%22]

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