By that I mean they can't find how these mobile devices are improving worker productivity, which computers have been doing quite ruthlessly for the last 70 years.

WSJ: Why Aren't Smartphones Making Us More Productive?

America has not managed much in the way of growth-enhancing structural reforms and has a long to-do list, from improving worker training to reining in health-care costs.

ECONOMIST: Free exchange

So we also looked at the best practices of five companies that are doing an excellent job of improving and developing worker skills.

WHITEHOUSE: President Obama Meets with Economic Recovery Advisory Board | The White House

"It's not illegal to track your own employees inside your own building, " he says, adding that the data could be helpful in improving firm and worker performance.

WSJ: Tracking Sensors Invade the Workplace