Neoclassical aka Endogenous Growth Theory:
Without technology, no real GDP growth will occur. Tech leads to increased savings & investment, which causes capital per labor hour to grow and real rate of return to fall to target rate.
Differs from classical in that pop. growth is NOT related to economic growth, and the mort important economic influence on pop. growth is the opportunity cost to women for entering work force –> wages up, women work, pop. growth slows, however more is spent on health care so the death rate also decreases.
Also, the technology growth benefit is shared by all sectors of the economy.