What do you want to do when you've finished? <a href=" http://buylevitraprofessional20mg.org/ ">levitra cheapest prices</a> It&rsquo;s not just poverty that distracts people, says Shafir. Dieting and other distractions that have to do with making resources scarce do, too. It may be that rationing anything from food to time to money is especially distracting for the human brain. Shafir and Mullainathan have written a book on the issue "Scarcity: Why Having Too Little Means So Much," to be published in September.