Originally posted by Straybow
Inflation is zero and there is no borrowed money with interest charges, so the calc is simple. You can do a ROI study which becomes simple to the point of trivial:
Payback period = (Cost-(delivery×2)) / (continuing trade)
For Cost < delivery×2 period = 1
* Straybow looks for a smilie with a professor's cap and pointer
(you could do that by calculating the Net Present Value of the flow of gold you will receive during the following years, but I don't think it's worth the effort)
Payback period = (Cost-(delivery×2)) / (continuing trade)
For Cost < delivery×2 period = 1
* Straybow looks for a smilie with a professor's cap and pointer
I agree that there is no formal borrowing with interest charges, but you can sell one of your white goods and then rebuild it which provides a pseudo borrowing with a cost associated.
Similarly you can "invest" your gold in white goods, caravans or wonders in order to get a future return.
This suggests to me that there is a finite, but non-zero cost of capital for the net present value calculation. (But I have no idea how to calculate it, or even give it any bounds other than zero and infinity.)
RJM at Sleepers
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