Nobel Laureate Daniel Kahneman points out the people earning less than $60k per year are progressively more unhappy the less they earn, but folks over $60k are all basically at the same level of happiness. My Money Blog http://bit.ly/aT0TGc
"Provisional" bonuses offered in advance, with the possibility of forfeiture, are more motivating than standard bonuses. Economist magazine: http://bit.ly/5YGGyH