Indifference curve analysis is based on numerical measurement of utility

If aggregate expenditures are lower than real GDP:

A. actual real output is less than equilibrium real output. B. aggregate output increases. C. employment increases. D. there will be unplanned increases in inventories.

An economy with population 500 million has a research and development productivity of 0.0005, and its output per person has risen from one period to the next along its balanced growth path from 350 to 362.5

The fraction of this economy's population engaged in research and development is ________. A) 14% B) 2.5% C) 3.6% D) 10 %