Researchers looked at preindustrial mortality records in Quebec and Finland and found that families with a grandmother in the household had more kids and kids who lived longer, aka the “grandmother hypothesis.” Up to a couple points:
- Just 1.75 more kids.
- Younger grandmothers increased survival between 2 to 5 by 30%. Grandmothers over 75 reduced survival probability to age 2 by 37%.
Also, this is fairly indirect data looking at old records. It would be more valuable with more direct evidence. Though, how one could do an experiment where some kids get to have a grandma where others don’t would likely be deemed unethical.
I wonder how much that means for today’s society. My cousins with the largest number of kids live closer to their mothers.
When I moved here for a job, it was when I was single and a pretty decently easy drive to get home to help out when needed. It doesn’t seem so easy anymore with a family.