Many of ESL's ships leave Africa emptier than when they arrived, but that is changing.

ECONOMIST: Shipping in east Africa

And there's a void in shops too which seem to be getting emptier.

BBC: Uncertainty dampens Harare's mood

Because little research, and even less development, has happened since, the pipeline of good ideas is getting steadily emptier.

ECONOMIST: Russia��s arms industry

Lots of sports fans with emptier bank accounts can understand the appeal.

FORBES: The World's Richest Sports Owners

Stores in other areas of London, however, have been emptier than usual.

WSJ: Menu

In an advanced system, transit system operators would be able to notice bus bunching conditions before the buses meet, give green lights to the front bus and alert riders to the presence of emptier buses following the first.

FORBES: Busting Bus Bunching With Traffic Signals