Video 1
The demographic transition model shows how modernization affects the countries population
You have to account for immigration and emigration when making the model
Countries don't need to go linear through the model
Video 2
There is something that is called a cultural lag where the mortality rate goes down without the population being able to do anything about it
In stage three girls go to school and have jobs which decreases the birth rate which is the starting point of a stage three country
Demographic trap is where the population goes over the carrying capacity of a nation which puts them back to stage 1
Video 3
Most countries in the 4th stage are having a smaller population
Immigration is what is keeping most European countries from having a decreasing population
High birth rates in third world countries is due to kids being useful on a farm
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