ECO 345 HOTELLING (ARAMCO), COASE, CARBON TAX HW3, GROUP ASSIGNMENT. 1. Aramco (the Saudi company headquartered in Dhahran) has 30 barrels of oil. The marginal cost of extracting a barrel is given by MC(q) = 3q. This means that 3 is the cost of extracting unit number 1, and 6 is the cost of extracting […]