Adam Smith and the invisible hand by Helen Joyce
http://72.14.203.104/search?q=cache:MuOdEe2_sJQJ:plus.maths.org/issue14/features/smith/+The+system+in+which+the+invisible+hand+is+most+often+assumed+to+work+is+the+free+market.+Adam+Smith+assumed+that+consumers+choose+for+the+lowest+price,+and+that+entrepreneurs+choose+for+the+highest+rate+of+profit.+He+asserted+that+by+thus+making+their+excess+or+insufficient+demand+known+through+market+prices,+consumers+%22directed%22+entrepreneurs%27+investment+money+to+the+most+profitable+industry.+Remember+that+this+is+the+industry+producing+the+goods+most+highly+valued+by+consumers,+so+in+general+economic+well-being+is+increased.&hl=en&gl=us&ct=clnk&cd=1