I wouldn’t be be too confident. Much more honest explanations exist eg they learnt about the technique later in their PhD and didn’t go back to redo earlier analyses.
Seems doubtful as she published it in the American Economic Review after she’d completed her thesis. I’m surprised the reviewers didn’t require that clustered standard errors be shown, but I can only guess it wasn’t common back then.
I wouldn’t be be too confident. Much more honest explanations exist eg they learnt about the technique later in their PhD and didn’t go back to redo earlier analyses.
Seems doubtful as she published it in the American Economic Review after she’d completed her thesis. I’m surprised the reviewers didn’t require that clustered standard errors be shown, but I can only guess it wasn’t common back then.