The fact that participants were willing to substitute part of a food item for the mere prospect of a relatively small monetary award is interesting, says Reimann.

"The fact that participants were willing to substitute part of a food item for the mere prospect of a relatively small monetary award is interesting," says Reimann.

The International Monetary Fund calculates that countries can generate substantial fiscal revenues by eliminating fossil fuel subsidies and levying carbon charges that capture the domestic damage caused by emissions.

A woman holds the top spot at the International Monetary Fund; another won the Nobel Prize in economics.

In studies, he gave subjects a chance to deceive for monetary gain while examining their brains in a functional Mri machine, which maps blood flow to active parts of the brain.