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6. The Herfindahl index is calculated by (Points: 5)
a. adding the squared value of the market shares of all the firms in the industry.
b. multiplying the squared value of the market shares of all the firms in the industry.
c. adding the percentage of industry output produced by the largest four firms.
d. adding the percentage of industry output produced by the largest eight firms.


7. In December 2004, the oil-producing nations of OPEC began reducing output to keep prices above $40 per barrel. In doing this, OPEC was acting as a monopoly even though there was more than one producer. OPEC is a: (Points: 5)
a. cartel.
b. price taker.
c. producer in a contestable market.
d. producer in a monopolistically competitive market.


8. The difference between a perfectly competitive firm and a monopolistically competitive firm is that a monopolistically competitive firm faces a: (Points: 5)
a. horizontal demand curve and price equal the marginal cost in equilibrium.
b. horizontal demand curve and price exceeds the marginal cost in equilibrium.
c. downward-sloping demand curve and price equal the marginal cost in equilibrium.
d. downward-sloping demand curve and price exceeds the marginal cost in equilibrium.


9. Suppose an industry only has four firms and they each have 10 percent, 8 percent, 8 percent, and 6 percent of the market. The Herfindahl index of this market is closest to which of the following? (Points: 5)
a. 8
b. 32
c. 66
d. 264


10. A good which if supplied to one person is supplied to all and whose consumption by one individual does not prevent its consumption by another individual is known as (Points: 5)
a. a private good.
b. a public good.
c. an external good.
d. an internal good.


11. An effluent fee is: (Points: 5)
a. a fee requiring market participants to certify they have reduced total consumption-not necessarily their own individual consumption.
b. charges imposed by the government on the level of pollution created.
c. a fee paid by users of a public good.
d. charges imposed on the wealthy of our society to help pay for those less fortunate.

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Joshua Stredder
Joshua StredderLv10
28 Sep 2019

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