If we know everyone's individual marginal benefit curve for a public good,then the economy's marginal benefit curve for that public good can be found by
A) finding the average of everyone's marginal benefit.
B) summing horizontally the amount of everyone's marginal benefit.
C) summing vertically the amount of everyone's marginal benefit.
D) averaging either horizontally or vertically the amount of everyone's marginal benefit.
E) none of the above; it is impossible to find this value.

Question

Quizplus · Accepted Answer

The economy's marginal benefit curve for a public good is found by summing vertically the individual marginal benefit curves because public goods are non-rivalrous and non-excludable, meaning each individual's benefit adds up at each quantity level.

If We Know Everyone's Individual Marginal Benefit Curve for a Public