Option (b), which calls for a rise in the rate of investment, is the right choice.
According to the Solow model, a rise in the population growth rate accelerates the growth of total output but has no long-term impact on the growth of output per person. The steady-state level of per capita output decreases as the population growth rate rises.
What it is A long-term economic growth model, the Solow growth model examines three key variables: capital accumulation, labor growth, and multifactor productivity. Economists use the latter to refer to technical advancement, which has an impact on labor and capital as well as the other two factors.
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