Refer to the below diagrams in which figures (a)and (b)show demand curves reflecting the prices Alvin and Elmer are willing to pay for a public good,rather than do without it.The collective willingness to pay for the 1^st unit of this public good is:

Question

Quizplus · Accepted Answer

The collective willingness to pay for the 1^st unit of the public good is the total area under the demand curves for Alvin and Elmer up to the quantity of 1 unit. Adding up the shaded areas on both demand curves, we get a total of $9 + $9 = $18. Therefore, the best choice is A.

Refer to the Below Diagrams in Which Figures (A)and (B)show