This paper studies the design of a recommender system for organizing social learning on a product. To improve incentives for early experimentation, the optimal design trades off fully transparent social learning by over-recommending a product (or “spamming”) to a fraction of agents in the...

“Project-based learning (PBL) is gaining increasing prominence as an educational tool for enhancing students' key future competences - communication, collaboration, critical thinking and creativity, referred to as the 4Cs. However, the proportion of PBL classes in Korean schools is among the...