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Estimates of the marginal product of capital can help forecast economic growth, test competing business cycle theories, and perform cost-benefit analysis. This paper presents annual and quarterly estimates of the net-of-depreciation marginal product of capital in the U.S. separately for the residential and non-residential sectors. The two sectors had positively correlated marginal products until the 2000s, when the residential marginal product fell during the housing boom, and rose during the housing bust. By the end of 2009, the residential MPK was back to the level of the 1990s.
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