He believes there is a danger that recent economic progress in neighbouring areas could be stalled if firms decide to switch to the enterprise zone.

BBC: Can enterprise zones do the job this time around?

It is unquestioningly accepted at home and widely used beyond the euro area's borders. (Several countries, including Montenegro and Kosovo, use the euro as their currency without formally belonging to the euro zone.) The switch from old currency to new went remarkably smoothly, though consumers in many countries complained, perhaps predictably, that they were charged higher prices as merchants rounded up to new price-points in euros.

ECONOMIST: Holding together

Where cities have pollution restrictions, for example, a driver could elect to drive purely on the battery, or to switch to that quieter mode in a school zone.

FORBES: Google's Free Predictive Software

Other teams that play zone, they (also) play man, they switch up defenses.

WSJ: Syracuse's D, Carter-Williams beat Indiana 61-50