Typical advice has been to get a full eight hours of sleep, but this is the "tyranny of the mean". Our individual sleep need is roughly the same across adulthood, though as discussed below ("Sleep and Aging"), the amount of sleep we need may decline slightly as we age.
But if the economy sputters and people aren't willing to pay the prices airlines are charging now for late-December travel, fares may actually decline as we get deeper into the fall.
Today, Western civilization may decline because we are overfishing the rich ocean -- our "fish basket" -- polluting the oceans, contaminating most wild fish with mercury from coal burning power plants, and destroying coastlines with over packed, waste-producing, pesticide -- and antibiotic-using fish farms.
In addition, with fluctuating transmissibility, the average transmissibility over the whole cycle may decline, and, as we show, lower transmissibility makes invasion by a rare type more difficult.
Prices may ultimately decline nationwide.
You may simply decline to respond.
Indeed, they may well decline.
Police may ask for permission to search; drivers may decline.
Health and physical skills may decline or be impaired, as may cognitive and emotional competencies.
While HARP might be appropriate for assisting in identifying those who may decline physically, it is not appropriate to identify those who may decline mentally.
We present a novel characterization of optimal dynamic incentive provision when performance-based incentives may decline continuously to zero.
