But what is often overlooked in making such comments is that a company may grow at a high rate for years because it can absorb resources of people and capital from outside itself; regions can similarly grow rapidly by absorbing people and capital from other areas.
New Zealand as a whole may increase its gross output more rapidly by bringing in lots of additional people and lots of additional capital, but that increase in gross output may produce only a modest increase in the per capita incomes of New Zealanders. No, doubling the growth in per capita incomes would be extremely difficult. But perhaps it would not be impossible.