I am trying to add a did structure to the feols() but after implementing:
model_1 <- feols(y~ treat*post+controls-1 | country+years|0| country, data = dataset)
the did estimator spills out NAs. Does anyone know why this could be the case?
Many thanks.
I think we need a FAQ: How to do a minimal reproducible example ( reprex ) for beginners
A handy way to supply some sample data is the dput() function. In the case of a large dataset something like dput(head(mydata, 100)) should supply the data we need.
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