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	<id>https://demography.subwiki.org/w/index.php?action=history&amp;feed=atom&amp;title=Parity_progression_ratio</id>
	<title>Parity progression ratio - Revision history</title>
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	<updated>2026-05-31T22:29:48Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
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		<id>https://demography.subwiki.org/w/index.php?title=Parity_progression_ratio&amp;diff=655&amp;oldid=prev</id>
		<title>Vipul: Created page with &quot;==Definition==  The term &#039;&#039;&#039;parity progression ratio&#039;&#039;&#039; (&#039;&#039;&#039;PPR&#039;&#039;&#039;) is typically used in the context of a cohort of females (such as a birth cohort) that has completed...&quot;</title>
		<link rel="alternate" type="text/html" href="https://demography.subwiki.org/w/index.php?title=Parity_progression_ratio&amp;diff=655&amp;oldid=prev"/>
		<updated>2014-02-27T20:17:26Z</updated>

		<summary type="html">&lt;p&gt;Created page with &amp;quot;==Definition==  The term &amp;#039;&amp;#039;&amp;#039;parity progression ratio&amp;#039;&amp;#039;&amp;#039; (&amp;#039;&amp;#039;&amp;#039;PPR&amp;#039;&amp;#039;&amp;#039;) is typically used in the context of a &lt;a href=&quot;/wiki/Cohort&quot; title=&quot;Cohort&quot;&gt;cohort&lt;/a&gt; of females (such as a &lt;a href=&quot;/wiki/Birth_cohort&quot; title=&quot;Birth cohort&quot;&gt;birth cohort&lt;/a&gt;) that has completed...&amp;quot;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;==Definition==&lt;br /&gt;
&lt;br /&gt;
The term &amp;#039;&amp;#039;&amp;#039;parity progression ratio&amp;#039;&amp;#039;&amp;#039; (&amp;#039;&amp;#039;&amp;#039;PPR&amp;#039;&amp;#039;&amp;#039;) is typically used in the context of a [[cohort]] of females (such as a [[birth cohort]]) that has completed its [[childbearing years]]. Given such a cohort, and a nonnegative integer &amp;lt;math&amp;gt;i&amp;lt;/math&amp;gt;, the parity progression ratio from birth order &amp;lt;math&amp;gt;i&amp;lt;/math&amp;gt; to birth order &amp;lt;math&amp;gt;i + 1&amp;lt;/math&amp;gt; is defined as the ratio of the [[completed cohort fertility]] for that cohort for birth order &amp;lt;math&amp;gt;i+1&amp;lt;/math&amp;gt;, to the [[completed cohort fertility]] for that cohort for birth order &amp;lt;math&amp;gt;i&amp;lt;/math&amp;gt;.&lt;br /&gt;
&lt;br /&gt;
Alternatively, the PPR describes the probability that a person in that cohort who has had &amp;lt;math&amp;gt;i&amp;lt;/math&amp;gt; children will proceed to have an &amp;lt;math&amp;gt;(i+1)^{th}&amp;lt;/math&amp;gt; child.&lt;/div&gt;</summary>
		<author><name>Vipul</name></author>
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