Do you ever find yourself asking yourself questions like…

• What the hell is a Hessian and how do I get R to invert it?
• How do I gather mass quantities of Twitter data in real-time? [then later] Whoa, what the crap do I do with 12 million tweets?
• What does a freaking “KeyError” mean, Python?

These are the kinds of questions which plague us. Bad Hessian is a blog dedicated to the nerdiest details of quantitative and computational social science. We have plenty of questions and maybe even a few answers. At the very least we have lots of code.