Suppose I am trying to optimize purely for altruistic impact , should I stay single or pursue a romantic relationship? Is there any relevant social science on the casual effects of each on productivity?
Intuitively, it seems like being single would be more useful since you would then have more time to dedicate to work. On the flip side, being in a relationship might help cut costs enabling more donating and could increase happiness to have an indirect effect on productivity?
If you want to try a work strategy that involves long hours then a positive successful relationship may be harder to achieve.
Otherwise I’d advocate you don’t instrumentalise your non-work time for impact. I know it’s a cliche but do what you enjoy. Instrumentalising your free time seems to make people less relatable (probably an understatement), less trustworthy, more prone to depression, less robust to sudden changes etc
Having a strong base, whatever it is for you, is pretty important I think. When impact stuff is going badly you don’t want to feel like everything is going badly. That kind of instability is going to have more Long term effect for your impact than a few thousand pounds a year in one direction or another.