lower population levels cause a decrease in average real wages and lower average real wages cause population levels to increase. / laer bevolkingsvlakke veroorsaak ‘n verlaging in gemiddelde reële lone en laer gemiddelde reële lone veroorsaak dat bevolkingsvlakke verhoog.

higher population levels cause a decrease in average real wages and lower average real wages cause population levels to decrease. / hoër bevolkingsvlakke veroorsaak ‘n verlaging in gemiddelde reële lone en laer gemiddelde reële lone veroorsaak ‘n verlaging in bevolkingsvlakke.

the rate of technological progress is proportional to the level of population growth. / die koers van tegnologiese vooruitgang is proporsioneel tot die vlak van bevolkingsgroei.

higher average real wages result in a natural reduction in the fertility rate. / hoër gemiddelde lone veroorsaak ‘n natuurlike verlaging in die fertiliteitskoers.