I agree with all of these points. And learning continues well beyond the PhD program: I’ve learned far more economics as a professor than I did as a student. That ongoing intellectual expansion is a large part of what makes this profession so rewarding.
Paul Goldsmith-PinkhamMy friend is teaching to his Economics Ph.D. students and explaining why they should be interested in topics that are not in their subfield. The friend asked for statements about why learning from other fields is good. Here was my answer: " Five things: