The exact role of space in facilitating better working environments and enhancing child development also remains largely unknown, and the role of multiple adults in ECEC settings is not sufficiently defined to maximise the impact on child outcomes. Additionally, no studies have specifically investigated whether working conditions (and which aspects of working conditions) have different effects on different groups of children, e.g., migrant children or children at risk. The link between Quality Child Care and Early Learning”, Lessons in Learning, CCL, Ottawa. Evidence from project STAR”, Quarterly Journal of Economics (forthcoming).