lukestein’s Twitter Archive—№ 7,185

Remember, is not that you can’t use Covid-19 as an instrument. It’s that you need to aggressively assert that while 𝘰𝘧 𝘤𝘰𝘶𝘳𝘴𝘦 we can never formally test exclusion restrictions, yours holds and you’d really rather defer the question until later in the presentation. t.co/350Mrm3jYw