"Mankiw's 10 principles of economics, translated for the uninitiated", by Yoram Bauman, http://www.standupeconomist.com . Presented at the AAAS humor session, February 16, 2007. For the record, the talk contains two unattributed quotes ("9 out of 5" is adapted from a line attributed to Paul Samuelson---although apparently he said it about Wall Street indices, not macroeconomists---and "wrong about things" is paraphrased from P.J. O'Rourke's Eat the Rich) and, of course, the Einstein "simple" quote is an intentional misquote. The talk is based on a published article in Annals of Improbable Research (see http://www.improb.com/airchives/paperair/volume9/v9i2/mankiw.html ), which sponsored my talk and to which you should subscribe (http://improb.com/subscribe/ ). In the paper you can see the "constructive example" of how trade can make everyone worse off (or you can just wait 50 years to see what happens with climate change). More info and other clips on my website (http://www.standupeconomist.com ), and please sign up for my email list. (No spam I promise.)