First you must choose the long-term debasement rate category:
a) declining nominal rate of debasement, i.e. asymptotically
nominally 0 a la Bitcoin
b) slight demurrage, i.e. shrinking money supply if you send it to the ether (forgot how Freicoin handles demurrage)
c) fixed nominal rate of debasement, i.e. asymptotically 0
%d) fixed % rate of debasement, a la Inflatacoin (which failed? Was it 10%? Did it exist?)
If you choose d (which apparently quite a few of us think is correct, but we may not be the majority?), then you have to decide the %.
So what determines the ideal %?
I suggested the long-term rate of debasement should mirror the population + productivity growth.
http://www.globalchange.umich.edu/globalchange2/current/lectures/human_pop/human_pop.htmlThe factors affecting global human population are very simple. They are fertility, mortality, initial population, and time. The current growth rate of ~1.3% per year is smaller than the peak which occurred a few decades ago (~2.1% per year in 1965-1970)
http://www.nber.org/papers/w15834 Its conclusion is that over the next 20 years (2007-2027) growth in real potential GDP will be 2.4 percent (the same as in 2000-07), growth in total economy labor productivity will be 1.7 percent, and growth in the more familiar concept of NFPB sector labor productivity will be 2.05 percent.
So that is a range between 1.3 + 1.7 = 3% to 2.1 + 2.05 = 4.2%, i.e. 3 - 4%.
Another way of framing this question is to consider my
theory that if the mining is won by the home miner (who doesn't care about the electrical cost thus crowds out the investment miner) this increases the number of spenders, which due to Metcalf's law, increases the network effects (growth in use) by the square of the increase in spenders.
Thus the ratio in network effects growth between a 0.5% and 1% rate of debasement is ≈ 1 x 1 / 0.5 x 0.5 = 400%.
Thus the ratio in network effects growth between a 0.5% and 3% rate of debasement is ≈ 3 x 3 / 0.5 x 0.5 = 2700%.
Thus the ratio in network effects growth between a 1% and 3% rate of debasement is ≈ 3 x 3 / 1 x 1 = 900%.
The ratio in network effects growth between a 3% and 5% rate of debasement is ≈ 5 x 5 / 3 x 3 = 278%.
The ratio in network effects growth between a 3% and 4% rate of debasement is ≈ 4 x 4 / 3 x 3 = 178%.
The math shows that going to higher percentages diminishes the potential gain in network effects growth for the same difference, e.g. 3 - 1 = 2 and 5 - 3 = 2, but the former is 900% and the latter is 278%.
One counter argument to the benefits of getting more coin into spenders hands is they spend putting a downward pressure on the price. But this liquidity means the price seen on the exchanges is more realistically the marginal price you will pay. Whereas
I had pointed out that when liquidity is low, the market price is meaningless.