Children from disadvantaged families have lower levels of school readiness when they enter school than do children from … implemented more recently in the US, find that the programs do improve outcomes for young children, particularly for those from …

"We investigate short and long-term effects of early childhood education using variation created by a unique policy … experiment in British Columbia, Canada. Our findings imply starting Kindergarten one year late substantially reduces the … for low income students and males. Estimates suggest that entering kindergarten early may have a detrimental effect on …