In the market for college degrees, there are many buyers but only 1 seller. Qd = 1000 - 2P. This implies that Price or Private MB = 500 - .50. Education has positive externalities. Assume each degree has a $50 value to society. Such that the Social MB = 550 - .5Q. MC = 100. 36. What is the efficient amount for Q and the corresponding P and Total Surplus? 37. 38