marguerite wants to sell her motorcycle, and ryan is looking for a used motorcycle to buy. ryan takes it for a test drive. marguerite knows that the clutch is going out on her motorcycle, the fuel filter is leaking, and the tires will need to be replaced soon. if she does not disclose this information to ryan and he cannot tell from his test drive, this is an example of an external cost. a public good. an external benefit. asymmetric information.