Agree that in some situations I have to take into account non-randomness of my sampling. While date of birth seems random and irrelevant, the distance to equator is strongly biased by distribution of the cities with universities which on Earth are shifted North.
Also agree that solving DA can be solution to DA: moreover, I looked at Google Scholar and found that the interest to DA is already declining.
Agree that in some situations I have to take into account non-randomness of my sampling. While date of birth seems random and irrelevant, the distance to equator is strongly biased by distribution of the cities with universities which on Earth are shifted North.
Also agree that solving DA can be solution to DA: moreover, I looked at Google Scholar and found that the interest to DA is already declining.