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Untrue; US natives have a negative rate while immigrants from poorer countries have a positive rate. Among immigrants the birth rate dramatically falls with the

Untrue; US natives have a negative rate while immigrants from poorer countries have a positive rate. Among immigrants the birth rate dramatically falls with the second generation. In 2014 the fertility rate was 1.9 which is below replacement.

dragonwriter 10y ago
No, it's absolutely true that the US has a positive natural rate of increase, and that not all population growth is due to immigration; increase due to immigration is the increase from people crossing the border. Naturally increase in the non-native population isn't increase "due to immigration", either in the terms normally used in population dynamics, or, really, in any meaningful sense other than the way in which all population increase in a place where humanity didn't arise is attributable to some past migration.
- Kbelicius 10y ago
  Wherever I look at general, completed, and total fertility rates are below replacement rates for US. Do you have any source on this positive natural rate of increase?
  - dragonwriter 10y ago
    Fertility rate below replacement isn't the same as not having positive rate of natural increase; like you, I find every source on fertility rate has it below replacement, but every source on natural increase has it positive. [0] That's entirely consistent; below replacement fertility doesn't imply a current negative rate of natural increase, though if maintained indefinitely it implies an eventual negative rate of natural increase. [1] [0] examples: https://knoema.com/atlas/United-States-of-America/topics/Demographics/Population/Rate-of-natural-increase https://knoema.com/atlas/United-States-of-America/topics/Dem... http://www.prb.org/Publications/Articles/2012/us-population-growth-decline.aspx http://www.prb.org/Publications/Articles/2012/us-population-... http://www.susps.org/overview/birthrates.html http://www.susps.org/overview/birthrates.html [1] Assuming the replacement rate is accurate, but current replacement rates are based on projections into the future based on past mortality trends, and can be inaccurate in projecting what is needed for replacement for that reason.

dragonwriter 10y ago

No, it's absolutely true that the US has a positive natural rate of increase, and that not all population growth is due to immigration; increase due to immigration is the increase from people crossing the border. Naturally increase in the non-native population isn't increase "due to immigration", either in the terms normally used in population dynamics, or, really, in any meaningful sense other than the way in which all population increase in a place where humanity didn't arise is attributable to some past migration.

Kbelicius 10y ago
Wherever I look at general, completed, and total fertility rates are below replacement rates for US. Do you have any source on this positive natural rate of increase?
- dragonwriter 10y ago
  Fertility rate below replacement isn't the same as not having positive rate of natural increase; like you, I find every source on fertility rate has it below replacement, but every source on natural increase has it positive. [0] That's entirely consistent; below replacement fertility doesn't imply a current negative rate of natural increase, though if maintained indefinitely it implies an eventual negative rate of natural increase. [1] [0] examples: https://knoema.com/atlas/United-States-of-America/topics/Demographics/Population/Rate-of-natural-increase https://knoema.com/atlas/United-States-of-America/topics/Dem... http://www.prb.org/Publications/Articles/2012/us-population-growth-decline.aspx http://www.prb.org/Publications/Articles/2012/us-population-... http://www.susps.org/overview/birthrates.html http://www.susps.org/overview/birthrates.html [1] Assuming the replacement rate is accurate, but current replacement rates are based on projections into the future based on past mortality trends, and can be inaccurate in projecting what is needed for replacement for that reason.