For John, BLUF: There may not be causation, but there is correlation between stay-at-home moms and the school performance of children. Nothing to see here; just move along.
On 30 December Pew Researcher Ms Gretchen Livingston, gave us "It’s no longer a ‘Leave It to Beaver’ world for American families – but it wasn’t back then, either".
The thrust of the short article from PEW was that what worked for families in 1960 didn't in 2014. We are a different nation, as this chart shows:
Regards — Cliff
♠ Gretchen Livingston is a senior researcher focusing on fertility and family demographics at Pew Research Center.