possible Consider the market for dams along a river, illustrated in the figure to the right, where S, is marginal private cost and D, is GOO- marginal private benefit. 550 Dams are an example of a public good IS Suppose that the consumption of dams along a river generates a positive externality of $100 per unit. If so, then according to the figure, the optimal quantity of Price of dams along a river (per square foot) dams along a river for society is units. (Enter your response as an integer.) 9+ Quantity of dams along a river