Facebook is free, but should it count toward GDP anyway?

For several decades, gross domestic product (GDP), a sum of the value of purchased goods, has been a ubiquitous yardstick of economic activity. More recently, some observers have suggested that GDP falls short because it ...

Scientists show how species diversity can pay dividends

For decades, conservationists have focused on the possible costs of extinction: the effects on a lost species' predators, prey and environment, or the effects on people who can no longer use the species for food or clothing. ...

page 1 from 2