Dan is comparing three machines to determine which one to purchase. The machines sell for differing prices, have differing operating costs and machine lives, and will be replaced when worn out. Which one of the following computational methods should Dan use as the basis for his decision? a. internal rate of return
b. operating cash flow
c. equivalent annual cost
d. depreciation tax shield
e. bottom-up operating cash flow

Many potential buyers value high-quality used cars at the full-information market price of € p1 and lemons at € p2. a limited number of potential sellers value high-quality cars at € v1 ≤ p1 and lemons at € v2 ≤ p2. everyone is risk neutral. the share of lemons among all the used cars that might be potentially sold is € θ . suppose that the buyers incur a transaction cost of $200 to purchase a car. this transaction cost is the value of their time to find a car. what is the equilibrium? is it possible that no cars are sold