Migration

Today in class we looked at a powerpoint about the net immigration rate and the total fertility rate. Net immigration is the difference between the number of persons leaving and entering a country during a year. Immigration is an excess of persons entering the country. Emigration is an excess of persons leaving the country. Emigration is written in negative numbers, but immigration is written in positive numbers. The total fertility rate is the average number of children born per women. For a population to remain the same, the TFR must be 2.1 If it's higher than 2.1, then the population rises. But it it's lower than 2.1, the population falls. The world TFR is 2.42. The U.S TFR is 2.01, and it was 2.06 last year.