…we find that expert opinion is particularly varied on the rate of time preference. The modal value is zero, in line with many prominent opinions. But with a median (mean) of 0.5 percent (1.1 percent)…
…while we find that experts recommend placing greater weight on normative than positive issues when determining the SDR, most believe that the SDR should be informed by both.
That is from the latest issue of American Economic Journal: Economic Policy, “Discounting Disentangled” by Drupp, Freeman, Groom, and Nesje. You will of course find a lengthy discussion of these issues in my own Stubborn Attachments: A Vision for a Society of Free, Prosperous, and Responsible Individuals.