Chapter 11 – Monopolistic Competition and Oligopoly (+ Appendix)
97. You are told that the four-firm concentration ratio in an industry is 20. Based on this
information you can conclude that:
98. Industry Y is dominated by five large firms that hold market shares of 20, 20, 25, 25, and
10. The Herfindahl index for this industry is:
99. Industry Y is dominated by five large firms that hold market shares of 20, 25, 15, 10, and
25 percent. The four-firm concentration ratio for this industry is: