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Long‐Run Growth Differences and the Neoclassical Growth Model

This paper shows that allowing factor income share differences across countries in a modified Solow model can imply differences in output growth rates across countries. Using cross‐sectional data for 52 countries, an empirical illustration shows that the parameters of the modified model are intuitively plausible, jointly significant, and possess modest explanatory power (R2 around 0.25). The paper emphasizes the methodological importance of simplifying assumptions on applied theory.