Diane Coyle, author of GDP: A Brief but Affectionate History, talks with EconTalk host Russ Roberts about the history of GDP, its uses, and its abuses. Topics discussed include the origins of GDP in the developed countries, the challenges of measuring the service sector, the challenges of dealing with innovation and product diversity, whether GDP should be supplemented with other measures of human well-being, and the challenges of dealing with internet-based goods that produce a great deal of satisfaction but make a much smaller impact on measured economic activity.