I've been going to Freakanomics a lot lately, and find some really interesting posts there. I feel my brain expanding as I leave my next lesson of cantonese on in the background and read some of the links from that blog.

Anyway, just wanted to post this as I thought it was thoughtworthy.

Emily Oster's talk about what we don't know about HIV.

As a random aside, something else interesting from/about Ms Oster.