Total fertility rate versus general fertility rate - Revision history

Vipul: /* Key differences */

2016-05-22T22:07:37Z

Key differences

← Older revision		Revision as of 22:07, 22 May 2016
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	! Difference type !! For TFR !! For GFR		! Difference type !! For TFR !! For GFR
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	\| essential purpose \|\| describing how many children a female ''would'' have if at each age she behaved like the average of the ~~woman~~ currently at that age \|\| describing how many children have been added in a particular year, relative to the number of women		\| essential purpose \|\| describing how many children a female ''would'' have if at each age she behaved like the average of the women currently at that age \|\| describing how many children have been added in a particular year, relative to the number of women
	\|-		\|-
	\| relation with [[age-specific fertility rate]]s \|\| it is a ''total'' \|\| it is a ''weighted average''		\| relation with [[age-specific fertility rate]]s \|\| it is a ''total'' \|\| it is a ''weighted average''

Vipul at 09:24, 27 November 2013

2013-11-27T09:24:26Z

← Older revision		Revision as of 09:24, 27 November 2013
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	==Key differences==		==Key differences==

	{\| class="sortable" border"=1"		{\| class="sortable" border="1"
	! Difference type !! For TFR !! For GFR		! Difference type !! For TFR !! For GFR
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	\| scaling used to express the value \|\| scaled to a denominator of 1, i.e., we report the TFR per woman \|\| scaled to a denominator of 1000, i.e., we report the GFR per 1000 women. This is simply because the GFR value per woman would be too small, and we generally prefer to use a scaling where we get reasonably large and easily comparable numeric values.		\| scaling used to express the value \|\| scaled to a denominator of 1, i.e., we report the TFR per woman \|\| scaled to a denominator of 1000, i.e., we report the GFR per 1000 women. This is simply because the GFR value per woman would be too small, and we generally prefer to use a scaling where we get reasonably large and easily comparable numeric values.
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			==Cases where they convey equivalent information==

			TFR and GFR would be easily related in the following two cases:

			* All the age-specific fertility rates are the same. In this case, the GFR would equal all the equal age-specific fertility rate values, and the TFR would be the product of that value and the number of childbearing years.
			* The population size is the same for each age. In this case, the GFR would equal the average of the age-specific fertility rate values, and the TFR would be the sum of the age-specific fertility rate values. In this case again, the TFR would equal the product of the GFR and the number of childbearing years.

			Of course, neither case occurs in practice: there is considerable variation in the age structure of the female population (see the [[population pyramid]] for more), and considerable variation in the age-specific fertility rates.

Vipul: Created page with "==Key differences== {| class="sortable" border"=1" ! Difference type !! For TFR !! For GFR |- | essential purpose || describing how many children a female ''would'' have if a..."

2013-11-27T09:23:51Z

Created page with "==Key differences== {| class="sortable" border"=1" ! Difference type !! For TFR !! For GFR |- | essential purpose || describing how many children a female ''would'' have if a..."

New page

==Key differences==

{| class="sortable" border"=1"
! Difference type !! For TFR !! For GFR
|-
| essential purpose || describing how many children a female ''would'' have if at each age she behaved like the average of the woman currently at that age || describing how many children have been added in a particular year, relative to the number of women
|-
| relation with [[age-specific fertility rate]]s || it is a ''total'' || it is a ''weighted average''
|-
| relation with [[age-specific fertility rate]]s, weighting used || we use a weighting of 1, i.e., we just add up the ASFR values || we weight by the population of women of that age
|-
| scaling used to express the value || scaled to a denominator of 1, i.e., we report the TFR per woman || scaled to a denominator of 1000, i.e., we report the GFR per 1000 women. This is simply because the GFR value per woman would be too small, and we generally prefer to use a scaling where we get reasonably large and easily comparable numeric values.
|}