Princeton University economist who was awarded the Nobel prize in economics. In 2003 he developed a "rational inattention" model, in which optimising agents can process only so much information at a time. The model explains the smooth (rather than instant) adjustment of various macroeconomic variables, including interest rates and prices, to new information: people sensibly devote just a portion of their limited attention to learning about market-moving news.
His work built on Herbert Simon's concept of bounded rationality and helped lay the foundations of attention economics.
Nobody ever ruined their eyesight by looking at the bright side of something.