Everybody knows economic productivity is the key to how fast an economy can grow, right? So the below image from the BLS shows a disturbing lack of productivity in the last 8 years:
Working in IT, that seems totally wrong, because the Internet has been a great productivity booster for more than the last decade. You can get questions answered on StackExchange, use or write open source software on GitHub, collaborate remotely using a ton of different collaboration tools (email, screensharing, group chat, etc.).
The standard productivity measure does not include all these new technologies and ways of working. So I was glad to see economists looking at ways to measure the Internet's contribution to productivity in The Past Two Decades: The Coming of the Information Economy Looks to Have Doubled Our True Rate of Economic Growth:
...So figure on not 1.75%/year but rather 3.5%/year as the true rate of increase of the American economy’s productivity over the past two decades…
That's awesome for the long-term prospects of economic growth!