When GDP became the dominant measure of economies in the 1940s, the internet was still a half-century out. Today, the internet drives a major chunk of economic activity, but GDP misses much of it. This has widened the gap between the closely watched metric and actual economic health.
Driving the news: Economists are working on alternative measures that they say will more correctly gauge national prosperity, accounting for relatively new industries, plus intangibles like income inequality and clean air and water. But the pace of technological advances may be enlarging the gap even as they work to close it.