In 1970, an economist wrote 13 pages explaining why good used cars vanish from the market. Three journals rejected the paper as trivial. It won the Nobel Prize, and it just predicted the death of the compliment. George Akerlof's insight was simple. Sellers know if a car is a lemon. Buyers don't. So buyers only ever offer the average price, anyone with a genuinely good car refuses to sell at that price and walks, and the market slowly fills with junk until buyers lower their offers again. The…