The Herfindahl-Hirschman Index Is Measured by

The Herfindahl-Hirschman index is measured by

A) adding the market shares of the four largest firms in an industry.
B) calculating the eight-firm concentration ratio for an industry.
C) summing the squares of the market shares of all firms in an industry.
D) calculating the four-firm concentration ratio for an industry.
E) squaring the sum of the market shares of all firms in an industry.