We propose a model to identify the causes of rising profits and concentration, and declining entry and investment in the US economy. Our approach combines a rich structural DSGE model with cross-sectional identification from firm and industry data. Using asset prices, our model estimates the...

We study the evolution of profits, investment and market shares in US industries over the past 40 years. During the 1990's, and at low levels of initial concentration, we find evidence of efficient concentration driven by tougher price competition, intangible investment, and increasing...

We combine a structural model with cross-sectional micro data to identify the causes andconsequences of rising concentration in the US economy. Using asset prices and industrydata, we estimate realized and anticipated shocks that drive entry and concentration. Wevalidate our approach by showing...

Over the past twenty years, Europe has deregulated many industries, protected consumer welfare, and created strongly independent regulators. These policies represent a stark departure from historical traditions in continental Europe. How and why did this turnaround happen? We build a political...

We study the entry and exit of firms across U.S. industries over the past 40 years. The elasticity of entry with respect to Tobin’s Q was positive and significant until the late 1990s but declined to zero afterwards. Standard macroeconomic models suggest two potential explanations: rising...

We measure the evolution of dominant firms in the U.S. economy since 1960, and globally since 1990. Contrary to common wisdom, dominant firms have not become larger, have not become more productive, and their contribution to aggregate productivity growth has fallen by more than one third since 2000