Research economists teamed with psychologists aiming to study the mercantile mind; chose as their subjects some Capuchin monkeys and cotton-top tamarins (creatures of lure). Monkeys are partial to marshmallows, cucumbers, peanuts and grapes, and they soon got the gist. Using a system of levers, rewards and a budget of treats they made progress until scientists noticed a well-known phenomenon: monkeys began to trade silver for sex. What was discovered (in subsequent tests) was that monkeys don’t save and are likely to steal – habits suggestive of human behavior; now these observations led Chen to conclude: monkeys learn quickly and most are astute. Hire a monkey investor to manage your loot.