This paper studies the role of consumer learning in the demand for recorded music by examining the impact of an artist's new album on sales of past and future albums. Using detailed album sales data for a sample of 355 artists, we show that the release of a new album increases sales of old...

We examine merging firms' additions and removals of products for a sample of 66 mergers across a wide variety of consumer packaged goods markets. We find that mergers lead to a net reduction in the number of products offered by merging firms. Merging firms tend to both drop and add products at...

We study changes in markups across 72 product markets from 2006 to 2018. A growing literature has documented a rise in markups over time using a production function approach; we instead employ the standard microeconomic method, which is to estimate demand and then invert firms' first-order...