For a natural monopoly to exist A) a firm must continually buy ...

[bobbysung]

For a natural monopoly to exist
 
  A) a firm must continually buy up its rivals.
  B) a firm must have a government-imposed barrier.
  C) a firm's long-run average cost curve must exhibit diseconomies of scale beyond the economically efficient output level.
  D) a firm's long-run average cost curve must exhibit economies of scale throughout the relevant range of market demand.

Question 2

The demand curve for a Giffen good is
 
  A) non-existent. B) upward sloping.
  C) non-linear but downward sloping. D) vertical.

[ebonylittles]

Answer to Question 1

D

Answer to Question 2

B