Principles of Economics 2e
Principles of Economics 2e
2nd Edition
ISBN: 9781947172364
Author: Steven A. Greenlaw; David Shapiro
Publisher: OpenStax
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Chapter 11, Problem 1SCQ

Is it true that a merger between two films that are not already in the top four by size can affect both the four-firm concentration ratio and the Herfindahl-Hirshmau Index? Explain briefly.

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To determine

Whether it is 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 Herfindahl-Hirshman Index.

Answer to Problem 1SCQ

Yes, it is 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 Herfindahl-Hirshman Index.

Explanation of Solution

Since, the market shares of all the firms are included in the HHI calculation, so when there is a merger between the two firms the HHI will change.

So, in the case of four- firm concentration ratio it is possible that the merger between let’s say the 6th and the 5th largest firms in the market would create a new firm that may be ranked in the top four in the market.

So, in the case mentioned above a merger of the two firms that are neither in the top four, but still they would change the four-firm concentration ratio.

So, it is 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 Herfindahl-Hirshman Index.

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Students have asked these similar questions
Is 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.
Consider 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.
what is the Four-firm concentration ratio (CR4)? what is the  Herfindahl-Hirshman Index (HHI)? and how are they different?

Chapter 11 Solutions

Principles of Economics 2e

Ch. 11 - What is a corporate merger? What is an...Ch. 11 - What is the goal of antitrust policies?Ch. 11 - How do we measure a four-firm concentration ratio?...Ch. 11 - How do we measure a Herfindahl—Hirshman Index?...Ch. 11 - Why can it be difficult to decide what a market is...Ch. 11 - What is a minimum resale price maintenance...Ch. 11 - What is exclusive dealing? How might it reduce...Ch. 11 - What is a tie-in sale? How might it reduce...Ch. 11 - What is predatory pricing? How might it reduce...Ch. 11 - If public utilities are a natural monopoly, what...Ch. 11 - If public utilities are a natural monopoly, what...Ch. 11 - What is cost-plus regulation?Ch. 11 - What is price cap regulation?Ch. 11 - What is deregulation? Name some industries that...Ch. 11 - What is regulatory capture?Ch. 11 - Why does regulatory capture reduce the...Ch. 11 - Does either the four-firm concentration ratio or...Ch. 11 - What would be evidence of serious competition...Ch. 11 - Can you think of any examples of successful...Ch. 11 - If you were developing a product (like a web...Ch. 11 - In the middle of the twentieth century, major U.S....Ch. 11 - Why are urban areas willing to subsidize urban...Ch. 11 - Deregulation, like all changes in government...Ch. 11 - Do you think it is possible for government to...Ch. 11 - Use Table 11.5 to calculate the four-firm...Ch. 11 - Use Table 11.5 and Table 11.6 to calculate the...Ch. 11 - If the transit system were allowed to operate as...Ch. 11 - If the transit system were regulated to operate...Ch. 11 - If the transit system were regulated to provide...
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