Monkeys understand economics too

published Aug 24, 2010, last modified Jun 26, 2013

"To Chen’s surprise, Felix and the others responded rationally. When the price of a given food rose, the monkeys bought less of it, and when the price fell, they bought more. The most basic law of economics — that the demand curve slopes downward — held for monkeys as well as humans."

Pretty amazing read!  Scroll down to Monkeys wise up and get the hang of money.  Oh yeah, I almost forgot -- as expected, female monkeys sell sex for money too.