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The Marginal Product of Capital

Francesco Caselli and James Feyrer

The Quarterly Journal of Economics, 2007, vol. 122, issue 2, 535-568

Abstract: Whether or not the marginal product of capital (MPK) differs across countries is a question that keeps coming up in discussions of comparative economic development and patterns of capital flows. Using easily accessible macroeconomic data we find that MPKs are remarkably similar across countries. Hence, there is no prima facie support for the view that international credit frictions playa major role in preventing capital flows from rich to poor countries. Lower capital ratios in these countries are instead attributable to lower endowments of complementary factors and lower efficiency, as well as to lower prices of output goods relative to capital. We also show that properly accounting for the share of income accruing to reproducible capital is critical to reach these conclusions. One implication of our findings is that increased aid flows to developing countries will not significantly increase these countries' capital stocks and incomes.

Date: 2007
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Working Paper: The Marginal Product of Capital (2006) Downloads
Working Paper: The marginal product of capital (2006) Downloads
Working Paper: The Marginal Product of Capital (2005) Downloads
Working Paper: The Marginal Product of Capital (2005) Downloads
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