What are the margins on child care? How elastic is demand for childcare? Not all child care has equally strict limits on the ratio (it depends where care is be

What are the margins on child care? How elastic is demand for childcare? Not all child care has equally strict limits on the ratio (it depends where care is being provided), increasing wages may drive people to more loosely regulated child care, or just push it into the informal sector, or make more women stay home rather than work.