product quality - and between market size and product concentration - for two industries that differ in their quality …

This paper uses new data to reexamine trends in concentration in U.S. markets from 1994 to 2019. The paper's main … contribution is to construct concentration measures that reflect narrowly defined consumption-based product markets, as would be … higher than previous results. Also in contrast with the previous literature, we find that product market concentration has …

In essence, this paper will try to decompose the concentration-profits relationship into separate concentration …-price arid concentration-cost relationships. By doing this, I hope to shed light on some of the allocative and distributive … high concentration save or waste resources? Does it lead to higher prices? Who gains and loses from a social policy hostile …

.Using U.S. NETS data, we present evidence that the positive trend observed in national product-market concentration between … 1990 and 2014 becomes a negative trend when we focus on measures of local concentration. We document diverging trends for … industries, top firms have contributed to the amplification of both trends. When a top firm opens a plant, local concentration …