Suppose that a small town has seven burger shops whose respective shares of the local hamburger market are (as percentages of hamburgers sold): 25%, 22%, 18%, 12%, 11%, 8%, and 4%. Instructions: Enter your answers as whole numbers. a. What is the four-firm concentration ratio of the hamburger industry in this town? es b. What is the Herfindahl index for the hamburger industry in this town?

Exploring Economics
8th Edition
ISBN:9781544336329
Author:Robert L. Sexton
Publisher:Robert L. Sexton
Chapter15: Oligopoly And Strategic Behavior
Section: Chapter Questions
Problem 12P
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Suppose that a small town has seven burger shops whose respective shares of the local hamburger market are (as percentages of all
hamburgers sold): 25%, 22%, 18%, 12%, 11%, 8%, and 4%.
Instructions: Enter your answers as whole numbers.
a. What is the four-firm concentration ratio of the hamburger industry in this town?
ces
b. What is the Herfindahl index for the hamburger industry in this town?
Transcribed Image Text:Suppose that a small town has seven burger shops whose respective shares of the local hamburger market are (as percentages of all hamburgers sold): 25%, 22%, 18%, 12%, 11%, 8%, and 4%. Instructions: Enter your answers as whole numbers. a. What is the four-firm concentration ratio of the hamburger industry in this town? ces b. What is the Herfindahl index for the hamburger industry in this town?
es
c. If the top three sellers combined to form a single firm, what would happen to the four-firm concentration ratio and to the Herfindahl
index?
Four-firm concentration ratio =
Herfindahl index =
Transcribed Image Text:es c. If the top three sellers combined to form a single firm, what would happen to the four-firm concentration ratio and to the Herfindahl index? Four-firm concentration ratio = Herfindahl index =
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