The paintings were moved to an unknown location and neither of the stolen works has been seen since, despite an international search and the offer of a reward.

BBC: NEWS | Entertainment | Three guilty of The Scream theft

Three pairs of chimps played this game, and the results revealed that the animals had a tendency to offer a fair and equal share of the food reward.

BBC: Sharing: Chimp study reveals origins of human fair play

Environmental activists recently discovered an effective way of raising awareness: They offer a reward for officials willing to swim in local rivers.

WSJ: Review & Outlook: What's in China's Water?

In order to get folks with the program, Verizon will offer those who opt in a coupon or "some other form of reward, " and the company is assuaging privacy fears by allowing users to control their privacy choices on the Verizon Selects website.

ENGADGET: Verizon Selects brings targeted ads to VZ wireless customers, induces more holiday shopping

"Bank of America's gift cards offer our commercial and corporate clients a convenient way to reward their employees and customers year round, especially during the holiday season, " Pierpoint says.

FORBES: Holiday Shopping

These include an initial cash back offer to customers, as well as a loyalty reward after a consumer spends a certain dollar amount, both of which are transfered back through the credit card.

FORBES: Swipely Expands Credit Card-Based Loyalty Service

If the euro area's governments make a credible commitment to repair their finances over the medium term, Mr Trichet should in return offer them the reward of an accommodating monetary policy.

ECONOMIST: Trichet's cachet | The

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FORBES: Magazine Article