Schelling talks about in Choice and Consequences about how traditional economics applies a discount rate, but how that fails to explanation many situations. Schelling writes, "[The person who] furiously scratches ..."

I think you accidentally deleted something in the midst of editing, because this paragraph comes out of nowhere. Discount rate for what? Scratching? You hint at the context in the next paragraph but unless I missed it you don't actually explain anywhere the example that you're referencing.

Also, your <em> didn't work. :)

The actual content is interesting, though. It's trying to remind me of something else I read recently but I can't quite put my finger on it.