The diagram below shows the marginal benefit and marginal cost of a public good.This economy has 3 individuals,A,B and C.The diagram shows the MB for each individual and a summation of their marginal benefits. 
FIGURE 16-4
-Refer to Figure 16-4.Once some quantity of this public good is provided,the efficient price to charge for its use is
Definitions:
Locus
The specific fixed position of a gene or DNA sequence on a chromosome, serving as a map reference for genetic studies.
Diploid
Referring to cells that contain two sets of chromosomes, one set inherited from each parent, typical of most body cells except for gametes.
Locus
A specific location or position on a chromosome where a particular gene or genetic marker is situated.
Chromosome
Colored body in the nucleus, composed of DNA and proteins and containing the primary genetic information of the cell; 23 pairs in humans.
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