Study shows leaving sweeter than revenge

By Maggie Fox, Health and Science Editor

WASHINGTON (Reuters) - Punishing a lazy team member can be counterproductive and it may be better to simply walk away, researchers said on Wednesday.

The researchers at Harvard University found that people who go to the trouble of punishing colleagues, co-workers or others in one-on-one situations do not profit from their revenge.

Such behavior does not pay off for a group, either, they reported in the journal Nature.

"Put simply, winners don't punish," said David Rand, who worked on the study. "Punishment can lead to a downward spiral of retaliation with destructive outcomes for everybody involved."

Rand works in Harvard's Program for Evolutionary Dynamics and Department of Systems Biology, which combines the study of evolution with economics.

His team studied people playing the so-called prisoner's dilemma computer-based game, in which 104 Boston-area students could choose to cooperate, defect or punish.

"Cooperation meant paying one unit for the other person to receive two units," the researchers wrote. So if both players cooperated, each got two units. Defectors could take off with three units, unless the other player defected too, in which case both ended up with only one.

"That makes defection tempting for most people and cooperation generally breaks down at some point in a prisoner's dilemma game," Manfred Milinski and Bettina Rockenbach of the Max-Planck-Institute for Evolutionary Biology in Ploen, Germany wrote in a commentary.