I'm guessing there would be family situations where having a babysitter who is trained as a teacher beats home life. PG tweeted data/commentary about childcare

I'm guessing there would be family situations where having a babysitter who is trained as a teacher beats home life. PG tweeted data/commentary about childcare recently and there was a bit saying that for some brackets of society, dedicated care at home was most effective. But for some brackets, the children were better off in group childcare.