The effect of an increase in population growth,all else remaining the same,is i.an increase in the full-employment quantity of labour.
Ii)an increase in potential GDP.
Iii)a decrease in the equilibrium real wage.

Question

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An increase in population growth leads to a larger labor force, increasing the full-employment quantity of labor (i) and potential GDP (ii). With more workers, the supply of labor increases, potentially decreasing the equilibrium real wage (iii) if demand doesn't increase proportionally.

The Effect of an Increase in Population Growth,all Else Remaining