Pros

Peer effects in co-worker productivity have been documented for low-skilled occupations, such as supermarket cashiers, soft-fruit pickers, salespeople, and call center workers.

Evidence suggests social interaction can lead to knowledge spillover from newly trained to untrained workers

The likely channel of productivity spillover in low-skilled settings is peer pressure; this can also help overcome free-rider problems.

Emerging representative studies complement evidence from lab and field experiments, producing an increasingly consistent and reliable body of evidence.