Since 2010, U.S. GDP growth has been anemic, averaging 2.1% a year, and this despite interest rates very close to zero. Historically, one would have expected such low sustained rates to lead to much stronger demand. They have not. For a while, one could point to plausible culprits, from a weak...

Since 2010, U.S. GDP growth has been anemic, averaging 2.1% a year, and this despite interest rates very close to zero. Historically, one would have expected such low sustained rates to lead to much stronger demand. They have not. For a while, one could point to plausible culprits, from a weak...

We extend the basic Schumpeterian endogenous growth model by allowing incumbents to undertake innovations to improve their products, while entrants engage in more “radical” innovations to replace incumbents. Our model provides a tractable framework for the analysis of growth driven by both...