There is a term called "global care chain", coined by Hochschild in 2000, that describes the migration of poor families to rich countries, and the outsourcing of childcare labor to poor families. Now it has budded into a rich area of academic discussion.

Also, anyone who has participated, even just as a customer, in the child care / afterschool education / extracurriculars industry, can see some the ways that parenting logistics differ from family to family.