Kaiserschmarrn wrote:And conversely there is the question if natural population growth has a positive economic impact per capita. Looking at countries with high birth rates I would say this is clearly not necessarily the case.
Theoretically population growth has a negative impact on per capita income since a share of income has to be invested to accumulate capital for the new population. That said, population growth in the industrialized world is generally so small that this is hardly of practical relevance*. Moreover, you could argue more people will create more innovations which should theoretically have a positive effect on growth. Again, of little relevance given billions of people in the developing world will contribute in the future.
*many countries also have an abundance of savings which are being exported instead of invested domestically, such as Germany.