Policymakers realize that, although education creates a positive benent for those who obtain it, it also creates external benefits for the community where the educated individual resides. The graph depicts the marginal social cost (MSC) and the marginal social benefit (MSB) associated with education. On the graph, move the point, P, to the point representing the optimal level of education Dollars (thousands) MSB 14 16 18 20 22 10 12 Years of schooling What is the socially optimal number of years of schooling for each citizen? optimal schooling: years Assuming that the marginal social benefits of education are completely externalized from the educated individual, how larpe would a Pigouvian subsidy need to be in order to reach this optimal level of schooling? Pigouvian subsidy: $ thousand