Someone once tried to calculate the optimal duration, and came up with 15 years: https://rufuspollock.com/papers/optimal_copyright_term.pdf https://rufuspolloc

Someone once tried to calculate the optimal duration, and came up with 15 years: https://rufuspollock.com/papers/optimal_copyright_term.pdf https://rufuspollock.com/papers/optimal_copyright_term.pdf I do not think law should be calculated (it sounds too much like hiding your political values behind science) but it's worth trying - just to see what assumptions you need to make.