Economic research requires writing documents, and often writing code. How can economists avoid drowning in a mess of different versions? How can they keep everything organized, and keep track of the changes they made? How can coauthors work constructively on the same set of files without going crazy?

For those in search of economics references, I prepared some notes on demand estimation in industrial organization. They survey a selected sample of discrete choice models, from multinomial logit to modern Berry, Levinsohn, and Pakes–type methods.

Expect more soon.