Fun fact: 7 survey respondents attempted to convert the number of minutes between them and their twin into a fraction of a year (e.g. 9.506E-06 years is 5 minutes). All 7 who did this were the older twin.
(I did include these people in the analysis above)
This provides evidence for the “Older twins care about being the oldest, younger twins don’t talk about it” hypothesis. I don’t think this will come as a massive surprise to anyone.
I understand that the price to swap birth order with your twin is a bowl of soup, although adjusting for 1% yearly inflation over 4000 years this now comes to 193 quadrillion bowls of soup.