Guys talk about getting the sign wrong on policy!!!

Government R&R accounted for 1/5 of total TFP growth since wwii!!!

I know there’s a lot right now. But folks need to understand what this means.

A suspension this long would mean people living with HIV lose their medicine for months. People around the world lose their PrEP for months, putting millions at risk of getting HIV. Drug-resistant strains could emerge.

I've decided to collect my DiD materials in a single place.

psantanna.com/did-resources

There, you will find
- 14 lectures of my comprehensive DiD course
- Shorter lectures/talks I have given on DiD
- My DiD R/Stata/Python packages
- Some DiD checklists
- DiD materials from my friends

Enjoy!