Why is the measurement of productivity more controversial today than it was in the days when the rational goal model was initially developed?

1) Because employees today are less likely to stay with an employer for many years

2) Because we already know as much about productivity as we need to know, so spending time and money on additional measurement is wasteful

3) Because it is more important to measure an organizations carbon footprint than its productivity

4) Because it is more complex to measure the productivity of intellectual capital than other forms of capital such as natural resources.