Thinking more about my own comment, perhaps researchers expecting to find more male offspring while googling find male offspring more often!
Re:Trivers–Willard Hypothesis
by ZeroGravitas on Sunday January 12, 2020 @05:20PM
(#22029958)
Worth bearing in mind that the birth ratio is generally tilted towards boys, about 52.5%
It cited 60% male to female billionaire ratio on n of 350.
But, the methodology was to use google and Wikipedia for research so a more honest claim might be “male offspring of billionaires show up in search results more often.”
I suppose that factoid wouldn’t have been paid for by the publisher though.