Economist Quotes and aphorisms about selling Paul Zane Pilzer Jose Angel Gurria William Petty Lawrence R. Klein Colin Camerer ,, We see that hyperactivity and reward areas are important when the bubble's rising. People getting c... Edmund Phelps ,, One reason why upturns follow downturns is that downturns tend to overshoot. People get panicky, th... Sendhil Mullainathan