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Consider the tables to the right displaying market share data for the largest firms in two industries

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Consider the tables to the right displaying market share data for the largest firms in two industries. Suppose that there are 10 firms in the printer market and 20 firms in the microwave market.

 

Printers
Firm	Market Share (%)
1	30
2	25
3	15
4	12

 

 

Microwaves
Firm	Market Share (%)
1	25
2	20
3	18
4	10

 

Two statistics that are often used to assess market power are the four-firm concentration ratio and the Herfindahl-Hirschman index (HHI). Given the data presented here, only the _____ can be calculated.

a. Four-frim concentration ratio

b. HHI

Using the measure of market power identified above the market for _____ is more concentrated.

a. Printers

b.Microwaves

Using the measure of market power identifid above, the market for _____ is more concentrated.

a. Printers

b. Microwaves

Why can't the other measure of market power be calculated?

a. There are too many firms in this market

b. These markets are not concentrated enough

c. It needs the market share for all the firms in the market.

d. There are too few firms in these markets.