There’s some arguments in favor and against time discounting linked from here (and more scholarly sources linked from those links): https://forum.effectivealtruism.org/topics/temporal-discounting
I’ve never personally looked into discount rates in any depth, and see the entire topic as rather beside the point; Scott Alexander best explains why: https://forum.effectivealtruism.org/posts/KDjEogAqWNTdddF9g/long-termism-vs-existential-risk
There’s some arguments in favor and against time discounting linked from here (and more scholarly sources linked from those links): https://forum.effectivealtruism.org/topics/temporal-discounting
I’ve never personally looked into discount rates in any depth, and see the entire topic as rather beside the point; Scott Alexander best explains why: https://forum.effectivealtruism.org/posts/KDjEogAqWNTdddF9g/long-termism-vs-existential-risk