第三章单元测试
- The elasticity of demand, is a measure
of how sensitive quantity demanded is to a change in ( ). - （ ） is the difference between the maximum amount consumers are willing to pay for a good and the amount they actually pay。
If a firm could have the ability to set price above ( ), then we can say it has market power.
In a perfectly competitive market, transaction costs are zero for ( )
- In a perfectly competitive market,
transaction costs are zero for both buyers and sellers. - The profit-maximizing rule tells a firm to produce that quantity of output for which marginal revenue equals marginal cost.
- Economists often evaluate the welfare effects of changes in market structure or of government policies by looking at changes in consumer surplus.
- A monopoly is the sole producer of a good for which there are no close substitutes
- The Lerner Index indicates that a monopolist has unlimited control over price.
- If the elasticity equals -10,the Lerner Index equals 0.01
- If monopolization of an industry raises costs, the deadweight loss is larger
- The competitive market equilibrium is allocatively efficient: It maximizes the sum of consumer and producer surplus.
- The deadweight loss triangle is a measure of the misallocation of resources resulting
from monopoly. - The simple comparison of competition and monopoly highlights the resource misallocation associated with market power.
Producer surplus is the difference between the ( )the producer receives for selling a unit of output and its reservation ( ）
A:quanlity B:output C:cost D:price
答案:price
A:consumer surplus B:producer surplus C:social welfare D:government surplus
A:
marginal cost
B:average cost
C:maximum profit
D:total cost
A:
only buyers
B:only sellers
C:sellers
D:buyers
A:错 B:对
A:错 B:对
A:错 B:对
A:对 B:错
A:对 B:错
A:错 B:对
A:对 B:错
A:对 B:错
A:错 B:对
A:错 B:对
A:market price, demand price B:market price, supply price C:demand price, market price D:marginal price, demand price
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