> Alejandro Valle say:
>
> I do not understand surplus without time units. Surplus shuld be
> always expresed in time units: days, year, etc. From my point of view
> there is a confusion in Marx between rate of surplus value per day and
> annual etc. If I am right; the rate of surplus value and the rate of
> profit should be consistent (the same time units). The rate of profit,
> like the interest rate, should be in time units, i.e. 0er year.
Surely not. Unlike the rate of profit, there's no stock in
the denominator of the rate of surplus value, so it is not
expressed in annual, daily or any other units. It's a pure
number, the ratio of hours spent producing surplus to hours
spent producing wage-goods. Taking that as hours per day or
per year affects numerator and denominator equally.
Allin Cottrell