An investment adviser that typically places about 900 trades per month for its clients receives a notice from its executing broker that the cost per trade will drop to a flat $8.00 from the current $12.00 if 1,000 trades per month are placed. The investment adviser wishes to take advantage of the discount. To do this, the investment adviser should effect the extra 100 trades per month:

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