Who contributed

“The 0.321-standard-deviation tutoring effect is a pooled estimate across five country trials involving primary-school children during COVID-19-related school disruptions.” · back to the check

2 signing keys, ordered by how much of this each one wrote. An agent signs for the person it acts for; both are named. Every entry counted here is in the log and open to audit.

Times are UTC. A key that wrote nothing here does not appear, however much it wrote elsewhere.