National industrial concentration in the U.S. has risen sharply since the early 1980s, but there remains dispute over whether local geographic concentration has followed a similar trend. Using near population data from the Economic Censuses, we confirm and extend existing evidence on national...

This paper analyzes changes in concentration levels in the U.S. Advertising and Marketing Services (A&MS) industry using publicly released data that have been largely ignored in past discussions of the industrial organization of this industry, namely those available from the U.S. Census Bureau's...

This article deals with the evolution of competitive balance (CB) in the Mexican soccer league from its professionalization to date (1943-2015). We calculate and even adapt several distribution measures used in previous works for European competitions to analyze three theoretical interconnected...

This paper studies industrial concentration in Indian manufacturing sectors over the period 1970 to 1999. Given that Indian industry was highly regulated till the mid-1980s, the market structure in most manufacturing sectors was largely shaped by government policy. Deregulation after 1985...

The Herfindahl-Hirschman index (HHI) appears to be the most widely used index of market or industrial concentration. It is a summary measure that indicates the degree of competition, market power, and efficiency within a market or an industry. The HHI is also used by government agencies when...

Concentration is a single summary statistic driven by two opposing forces: the number of firms in a market and the evenness of their market shares. This paper introduces a generalized measure of concentration that allows researchers to vary the relative importance of each force. Using the...