The principal agent is the object itself and not the instruction given by the teacher. It is the child who uses the objects; it is the child who is active, and not the teacher. — Maria Montessori Copy Share Image
“Holmstrom and P. Milgrom, “Multitask Principal-Agent Analyses: Incentive Contracts, Asset Ownership, and Job Design,” Journal of Law, Economics & Organization 7, no. 24 (1991).” — Erik Brynjolfsson Copy Share Image
