Articles

On June 1, 2011, both Floyd’s Coffee Shops in Portland, Oregon were busier than usual. The regulars were elbowed out of the way by new customers visiting the store for the first time to redeem their coupon and get $10 worth of coffee for $3. This tempting offer was...

Doctors in the developing world measure their progress not by the aggregate number of children who die in childbirth but by the infant mortality rate, a ratio of the number of births to deaths. Similarly, baseball’s leadoff batters measure their “on-base percentage” –...