Question 11 (1 point) I We can find private marginal costs by O multiplying private marginal costs by external costs. O subtracting social marginal costs from external costs. O subtracting external costs from social marginal costs. O dividing private marginal costs by external costs. Question 12 (1 point) I The free rider problem 0 can be avoided if a good is rivalrous. O can be avoided if a good is excludable. O can be avoided if a good is nonexcludable. O can be avoided if a good is nonrivalrous. Question 13 (1 point) I Sources of market failure include all of the following except 0 negative externalities. O poorly defined or lack of property rights. O taxes. O positive externalities. Question 14 (1 point) Il When a resource is overused because ofjoint ownership, we call this O the dangers of co-ownership. O the tragedy of the resources. O the tragedy of the commons. C) an efficient use of resources. Question 15 (1 point) II If the government wants to correct for a positive externality, it might O provide a subsidy to encourage sellers to produce less. O provide a subsidy to encourage sellers to produce more. C) impose an excise tax to encourage sellers to produce less. O impose an excise tax to encourage sellers to produce more. Question 16 (1 point) Il When one person's consumption reduces the amount available to others, we say the good is O rivalrous. O excludable. O nonrivalrous. O nonexcludable. Question 17 (1 point) I Rights to ownership, including the ability to transfer ownership via trade are known as O property rights. O trading rights. O first amendment rights. O ownership rights