John wrote in [4552]：
>Not so fast.
How slow?
Alan's example is a simple change in productivity so that the unit value
must simply fall to the half level immediately.
Its price can fall slower (or possibly faster) but that expresses merely
a redistribution of surplus value among branches, I think.
BTW, haven't we seen the rapid decrease in price per bit in semiconductors
due to rapid increase in productivity in that industry in these 20 years?
regards,
Iwao