Anational geographic channel special, inside north korea, reported on dr. sanduk ruit's humanitarian mission to north korea, one of the poorest countries in the world. over a 10-day period he performed 1,000 relatively straightforward eye surgeries to remove blindness due to cataracts. why is it not surprising that north korea doesn't have doctors to perform the surgery?

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