I know, but its a lot better than comparing a number for 30 years with a number for 1 year and saying the first is larger than the second.Stevek76 wrote: ↑27 Dec 2022, 3:37pmYou can't just multiply by number of years as future year figures get 'discounted' (because people value jam today more than jam tomorrow).Nigel wrote: ↑27 Dec 2022, 2:44pmIf one takes the various (not well referenced) figures in the news article, we have £4.5Bn over 30 years and, in the opposite direction, £0.1Bn (£100million) in one year. As 30*£0.1Bn=£3Bn over 30 years,pwa wrote: ↑26 Dec 2022, 7:43am Another article.
https://www.bbc.co.uk/news/uk-wales-64066163
One Welsh Government documanet suggests an economic hit from the default 20mph, but a minister predicts savings....
My own feeling is that it will all depend on how it is apllied.
Future discount value is really messy, what discount rate do you pick ? Or what outcome do you want, and find the rate required to give the outcome desired.....
There's a lot of random figures being chucked around in this article, ..
I agree, a point I was making.
This is a common problem with not having a mechanism to compare things.
As they note, not everything has been monetised and most of those things are benefits.
- Nigel