The document provides data on market shares and concentration ratios for various industries, including: - The 6 firm concentration ratio for the US film studio industry in 2005 was 71.6%, with the top 6 studios (Warner Bros., 20th Century Fox, Universal, Buena Vista, Sony, and Paramount) combining for over 70% of the total market gross. - No specific data or calculations are shown for the other concentration ratios mentioned, which include the UK music retailers in 2004, UK groceries in 2006, children's clothing in 2004, cinemas in 2006, insurance in 2006, US computer market in 2003, UK electricity generation in 2007, global hip and knee reconstruction in 2006, and mobile

1. 1. Calculate the 5 firm concentration ratio for UK music
retailers in 2004.
2. Calculate the 6 firm concentration ratio for US film
studios (January 1–December 31, 2005).
Overall Gross: $8.838 billion
Rank
Distributor
Market
Share
Total
Gross*
Movies
2005
Tracked Movies**
1
Warner Bros.
15.6% $1,377.1
25
19
2
20th Century Fox
15.3% $1,353.9
21
18

2. 3
Universal
11.4% $1,010.2
24
19
4
Buena Vista
10.4%
$921.5
23
17
5
Sony
10.4%
$917.8
26
23
6
Paramount
9.4%
$832.2
17
12
7
DreamWorks SKG
5.7%
$501.8
10
9
8
New Line
4.8%
$420.5
13
10
9
Lions Gate
3.2%
$284.0
20
18
10
Dimension
2.1%
$185.1
7
6
11
Miramax
2.1%
$183.7
17
14
12
MGM/UA
2.1%
$181.5
10
9
*In millions. ** # of total movies tracked that were released in 2005.
Source www.boxofficemojo.com
3. Calculate the 4 firm concentration ratio for the UK
Groceries market (12 weeks to January 1 2006).

3. 4. Calculate the 10 firm concentration ratio for the
children’s clothing market (2004).

4. 5. Calculate the 3 firm concentration ratio for cinemas
(2006).

5. 6. Calculate the X firm concentration ratio for the
insurance industry (2006).
7. Calculate the concentration ratio of the US computer
market (2003)

6. 8. Calculate the concentration ratio of the UK electricity
generation market (2007)
9. Calculate the concentration ratio of the global hip and
knee reconstruction market (Times 19.12.06)

7. 10. Calculate the global concentration ratios for mobile
phones and smart phones (Q2 2011)