Answer:
(a) 0.667 (b) The Lerner index helps in estimating of the market power of a firm. it measures the percentage markup that a firm is able to charge.
The conditions where this market power last in the long-run are; the pricing power, Factor mobility, Barrier to entry or exist.
Explanation:
Solution
Given that:
(A) The Lerner index is computed below:
Lerner index = (P-MC)/P
Thus,
($15-$5.00)/$15
=10/15
= 0.667
(B) The Lerner index assist in measuring of the market power of a firm. it measures the percentage markup that a firm is able to charge.
Index spans from a low value (0) to a higher value of (1)
When a firm has a higher value of index, it is able to charge over it;s marginal cost and thus has a greater monopoly power
Other conditions where market power last in the long run is as follows:
