I think Michael's posts [4532, 4542] let us approach the
issue in a very direct manner which gets right to the heart
of the problem.
Let me ask this question. Suppose in February, the
workers in a given branch of production make twice as
many goods as in January, having worked the same number
of hours in each month. Suppose this results from changes in
technology which, for the sake of simplicity, we will assume
have not changed the cost structure of the firm (that is, the
organic composition does not change).
So the workers, to put it simply, make twice as many things
in the same time, for the same money.
Has the value they add to the (aggregate) product doubled?
Alan