Average quarterly birth rates by birth characteristics before and after the baby bonus introduction as well as post-2004 assuming the policy did not occur.

a<p>per 100 births.</p>b<p>between post-BB rates and expected rates post-2004 (assuming the policy did not occur).</p><p>BB = baby bonus.</p

Average quarterly birth rates by maternal demographics before and after the baby bonus introduction as well as post-2004 assuming the policy did not occur.

a<p>per 1000 population.</p>b<p>between post-BB rates and expected rates post-2004 (assuming the policy did not occur).</p>c<p>SES: Socio-economic status. Sextiles 1–3.</p>d<p>SES: Socio-economic status. Sextiles 4–6.</p>e<p>Major cities and inner regional Australia.</p>f<p>Outer regional Australia, remote Australia, and very remote Australia.</p><p>BB = baby bonus.</p

Estimated quarterly birth rates in WA during July 2001 to December 2008.

<p>Vertical lines represent the period of the baby bonus implementation (April 2004-March 2005) that was excluded from the analysis. Horizontal line represents the trend line of the pre-baby bonus period, which was projected until 2008 assuming that no policy implementation occurred.</p