http://www.thetakeaway.org/2008/may/14/stephen-dubner-on-the-selfish-act-of-altruism/ http://www.podtrac.com/pts/redirect.mp3/audio.wnyc.org/takeaway/takeaway051408c.mp3 Stephen Dubner on the selfish act of altruism http://www.thetakeaway.org/2008/may/14/stephen-dubner-on-the-selfish-act-of-altruism/ true 9281 segment Tragedies like Hurricane Katrina, the Asian tsunami and the Sept. 11 attacks prompted billions of dollars in donations. But following an earthquake in Pakistan that killed 80,000... not so much. How much do Americans give to charitable causes? And why? Stephen Dubner, author of "Freakonomics," has n