I just came across a paper that shows that hyperbolic discounting is the right thing to do when future discount rates are uncertain. Here is a link to the paper:
"$100 placed at 7 percent interest compounded quarterly for 200 years will
increase to more than $100,000,000 -- by which time it will be worth nothing."
-- Lazarus Long, "Time Enough For Love", by Robert Heinlein
I just came across a paper that shows that hyperbolic discounting is the right thing to do when future discount rates are uncertain. Here is a link to the paper:
Hyperbolic discounting is rational: Valuing the far future with uncertain discount rates
by J. Doyne Farmer and John Geanakoplos
And here is a really nice writeup, which saves me from having to summarize the results myself.