Consider a market in which there are many potential buyers and
sellers of used cars. Each potential seller has one car, which is
either of high quality (a plum) or low quality (a lemon). A seller
with a low-quality car is willing to sell it for $4,500, whereas a
seller with a high-quality car is willing to sell it for $8,500. A
buyer is willing to pay $5,500 for a low-quality car and $10,500
for a high-quality car. Of course,...