Using Firth Logistic or not

[Duc Nguyen Duy]

I am using stata 17 software to run logistic regression. My sample has 2108 observations and the number of observations being 1 of the dependent variable is only 107. Should I run the Firth Logistic model?

[Richard Williams]

Borderline. See

https://www3.nd.edu/~rwilliam/stats3/RareEvents.pdf

And the sources it cites. Or better yet, if you can access it, see Leitgöb’s excellent discussion at

https://methods.sagepub.com/foundati...of-rare-events