If companies earn economic profits in a perfectly competitive market, over the long run the supply curve will most likely:
A.
shift to the left.
B.
shift to the right.
C.
remain unchanged
正确答案是B
If companies earn economic profits in a perfectly competitive market, over the long run the supply curve will most likely:
A.
shift to the left.
B.
shift to the right.
C.
remain unchanged
正确答案是B