Propagator

I remember learning this from Tim Harford once, perhaps in his blog; I stumbled upon this just now on Slate.com article by Tim Harford – which I do suspect is the same one I saw on ft.com (suggesting that he submits an article to multiple sites anyways). I decided to blog about it so I might remind myself to try. Some time at the end of next week when I’m out of camp I’ll be in front of a Starbucks counter asking for ‘Cappuccino Short’ and checking out how much I’m going to be charged for it.