I don’t see why this would be more biased than people who went to college in the 1990s (other than the fact that the latter make up a larger proportion of the current population).
Edit: I misunderstood your comment. I thought you made a point about the 1930s in general, rather than going to college in the 1930s. I now agree.
(other than the fact that the latter make up a larger proportion of the current population).
That does change things… Post-1930 saw an incredible expansion of college going, democratizing to a large fraction of the population. The enrolled population is going to change since it was very far from a random sample in the first place.
Sample bias warning: people who went to college in the 1930s constitute a highly atypical subset of humanity.
I don’t see why this would be more biased than people who went to college in the 1990s (other than the fact that the latter make up a larger proportion of the current population).
Edit: I misunderstood your comment. I thought you made a point about the 1930s in general, rather than going to college in the 1930s. I now agree.
That does change things… Post-1930 saw an incredible expansion of college going, democratizing to a large fraction of the population. The enrolled population is going to change since it was very far from a random sample in the first place.