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 …

market definition such as "acute in-patient care" averages out severe discrepancies that become visible when concentration is … only impact on the level of concentration, while the correlation remains high. Our results underline the need for more …

monopoly now features so prominently on the political and economic agenda. Mounting evidence shows that corporate concentration … stifles innovation and investment, resulting in lower-quality goods and services and less economic dynamism. Concentration is … people come to recognize the role of federal and state-level taxation in understanding corporate concentration in the US. Yet …

that all firms play an oligopoly game. We derive conditions under which increasing market concentration arises with myopic …

that all firms play an oligopoly game. We derive conditions under which increasing market concentration arises with myopic …

a new stage, with more concentrated markets. In this paper we intend to make an approach to the levels of concentration …

This article estimates the impact of industrial concentration on market power and cost and then links the ensuing … indicate that further increases in concentration would enhance welfare in 70% of the industries due to widespread efficiency … gains, although these would generally not be passed on to consumers. From a social standpoint, further concentration is more …

this in turn affects the one-firm concentration index. Then, in the second part, the number of banks in each submarket is …, the one-firm concentration ratio of each province is regressed on the number of banks, also in interaction with market …

provincial whereas the limiting concentration index - as argued by Sutton for industries with exogenous sunk costs - goes to zero …