Suppose there are three power-generating plants, each of which has access to 5 different production processes. The table below summarizes the cost of each production process and the corresponding number of tons of smoke emitted each. $\begin{array}{|c|c|c|c|c|c|}
\hline \text { Process } & \text { A } & \text { B } & \text { C } & \text { D } & \text { E } \
\text { (smoke/day) } & \text { (4 tons/day) } & \text { (3 tons/day) } & \text { (2 tons/day) } & (1 \text { ton/day) } & \text { (0 tons/day) } \
\hline \text { Cost to Firm } X(\$ / \text { day) } & \$ 500 & \$ 514 & \$ 530 & \$ 555 & \$ 585 \
\hline \text { Cost to Firm Y (\$/day) } & \$ 400 & \$ 420 & \$ 445 & \$ 480 & \$ 520 \
\hline \text { Cost to Firm Z(\$/day) } & \$ 300 & \$ 325 & \$ 360 & \$ 400 & \$ 550 \
\hline
\end{array}$
For all three firms, the marginal cost of pollution abatement is:
A)increasing
B)decreasing
C)constant
D)decreasing and then increasing

Question

Suppose there are three power-generating plants, each of which has access to 5 different production processes. The table below summarizes the cost of each production process and the corresponding number of tons of smoke emitted each. $\begin{array}{|c|c|c|c|c|c|}
\hline \text { Process } & \text { A } & \text { B } & \text { C } & \text { D } & \text { E } \
\text { (smoke/day) } & \text { (4 tons/day) } & \text { (3 tons/day) } & \text { (2 tons/day) } & (1 \text { ton/day) } & \text { (0 tons/day) } \
\hline \text { Cost to Firm } X(\$ / \text { day) } & \$ 500 & \$ 514 & \$ 530 & \$ 555 & \$ 585 \
\hline \text { Cost to Firm Y (\$/day) } & \$ 400 & \$ 420 & \$ 445 & \$ 480 & \$ 520 \
\hline \text { Cost to Firm Z(\$/day) } & \$ 300 & \$ 325 & \$ 360 & \$ 400 & \$ 550 \
\hline
\end{array}$
 For all three firms, the marginal cost of pollution abatement is:
A)increasing
B)decreasing
C)constant
D)decreasing and then increasing

Quizplus · Accepted Answer

As each firm reduces its pollution, the marginal cost of further reductions in pollution will increase. The reason for this is that the most cost-effective methods of reducing pollution will be used first, so later reductions in pollution will require more expensive methods. Additionally, as pollution levels decrease, it becomes harder to make further reductions since the remaining pollutants are likely to be more difficult to remove. Therefore, the marginal cost of reducing pollution will be increasing.

Suppose There Are Three Power-Generating Plants, Each of Which Has