MICROECONOMICS
11th Edition
ISBN: 9781266686764
Author: Colander
Publisher: MCG
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Chapter 15.1, Problem 6Q
To determine
Find the highest Herfindahl index.
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How do we measure a four-firm concentration ratio? What does a high measure mean about the extent of competition?
The following table presents information on the production of five firms
that produce all of the output in an industry.
Firm
A
B
с
D
E
Output (units)
900
900
900
100
100
Instructions: Round your answers to two decimal places.
a. What is the four-firm concentration ratio for this industry?
b. What is the Herfindahl-Hirschman Index for this industry?
what is the Four-firm concentration ratio (CR4)?
what is the Herfindahl-Hirshman Index (HHI)?
and how are they different?
Chapter 15 Solutions
MICROECONOMICS
Ch. 15.1 - Prob. 1QCh. 15.1 - Prob. 2QCh. 15.1 - Prob. 3QCh. 15.1 - Prob. 4QCh. 15.1 - Prob. 5QCh. 15.1 - Prob. 6QCh. 15.1 - Prob. 7QCh. 15.1 - Prob. 8QCh. 15.1 - Prob. 9QCh. 15.1 - Prob. 10Q
Ch. 15 - Prob. 1QECh. 15 - Prob. 2QECh. 15 - Prob. 3QECh. 15 - Prob. 4QECh. 15 - Prob. 5QECh. 15 - Prob. 6QECh. 15 - Prob. 7QECh. 15 - Prob. 8QECh. 15 - Prob. 9QECh. 15 - Prob. 10QECh. 15 - Prob. 11QECh. 15 - Prob. 12QECh. 15 - Prob. 13QECh. 15 - Prob. 14QECh. 15 - Prob. 15QECh. 15 - Prob. 16QECh. 15 - Prob. 17QECh. 15 - Prob. 18QECh. 15 - Prob. 1QAPCh. 15 - Prob. 2QAPCh. 15 - Prob. 3QAPCh. 15 - Prob. 4QAPCh. 15 - Prob. 5QAPCh. 15 - Prob. 1IPCh. 15 - Prob. 2IPCh. 15 - Prob. 3IPCh. 15 - Prob. 4IPCh. 15 - Prob. 5IPCh. 15 - Prob. 6IPCh. 15 - Prob. 7IP
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- Based on this information, the four-firm concentration ratio is?arrow_forwardSuppose the industry has six firms. Four firms have sales of Php 10 M each, while the other two have sales of Php 5 M each. The four firm concentration ratio is” A. 0.90 B. 0.80 C. 0.70 D. 0.60 E. No correct answerarrow_forwardCalculate the four-firm concentration ratio (CR-4) given the sales data. Assume that the firms listed are the only firms in this market. Sales (millions of dollars) 7.4 7.1 Expressive 6.8 LA & Company 6.2 5.3 Forever 22 Limitless 4.2 What is the four-firm concentration ratio? Round to the nearest whole percent in your calculations. Retailer Dap American Jaybirdarrow_forward
- The following table lists the market shares of the eight firms in an industry. Market Shares of Eight Firms in an Industry Market Share Firm 1 2 3 4 5 6 7 8 60 15 10 8 3 2 1 1 Calculate the four-firm concentration ratio for this industry. Enter your answer in the box below, and round to the nearest whole number if necessary.arrow_forwardUse the following table to calculate the four=firm concentration ratio for the U. S. auto market. Does this indicate a concentrated market or not? The table is............. GM 19% Ford 17% Toyota 14% Chrysler 11%arrow_forwardLet’s assume that in the state of California, there is an economic sector, where the firms have the following market shares: 17%, 3%, 10%, 14%, 9%, 24%, 8%, 15%. What is the four-firm concentration ratio of this industry?arrow_forward
- Is it true that the four-firm concentration ratio puts more emphasis on one or two very large films, while the Herfindahl-Hirshmau Index puts more emphasis on all the films in the entire market? Explain briefly.arrow_forwardFrom a Transaction Cost Economics perspective, when would you expect vertical integration to take place within an industry?arrow_forwardIs it true that a merger between two firms that are not already in the top four by size can affect both the four-firm concentration ratio and the Her findahl-Hirshman Index? Explain briefly.arrow_forward
- Should competition authorities prohibit vertical mergers that lead to higher input prices?arrow_forwardConsider an industry consists of three firms (Firm-A, Firm-B and Firm-C) with sales of AED300,000, AED700,000, and AED250,000; respectively. Calculate the Herfindahl-Hirschman index (HHI) for the industry. Calculate the four-firm concentration ratio (C4). Do you think the ‘Department of Justice’ (see the guideline below) would attempt to block a horizontal merger between Firm-A and Firm-C)? The Department of Justice’s Guidelines (Suppose): Suppose that the Department of Justice’s Guidelines suggest that antitrust authorities are more likely to challenge a merger when the relevant Herfindahl-Hirschman index is greater than 2,500 and the resulting increase in the index as a result of the merger is more than 200.arrow_forwardSuppose each of the 50 states had only one gasline stations were the same size. The four-firm concentration ratio for the state of New York, based on the state data, is???arrow_forward
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