Estimates of the marginal product of capital can help forecast economic growth, test competing businesscycle theories, and perform cost-benefit analysis. This paper presents annual and quarterly estimatesof the marginal product of capital in the U.S. separately for the residential and...

We develop a stylized model of economic growth with bubbles. In this model, financial frictions leadto equilibrium dispersion in the rates of return to investment. During bubbly episodes, unproductiveinvestors demand bubbles while productive investors supply them. Because of this, bubbly...