Each of the following cases applies to a country whose per capita real GDP has been steadily rising at 1 percent a year. In each case, does GDP overstate or understate the change in living standards?

a) The average amount of leisure time for workers has decretase.

b) The relative importante of the non-market sector has risen.

c) A larger proportion of the Economy's resources are devoted to recycling and the introduction of environmentally sustainable production techniques.

d) Incomes have become less equitably distribuited.