Alex is hyper-aware of her future path into college and she knows playing an instrument will help her land in a prestigious college. Her parents had recommended she play the violin since it wasn’t as heavy, but Alex believes cellos are in demand in university orchestras, which should help her admission application. Part of the role of playing an instrument or sport (notice Alex’s lacrosse stick) is not necessarily that they are correlated with better students, but rather they serve as signal that students can maintain a rigorous academic load while also balancing extracurriculars.
See more: choices, college, demand, expectations, signaling, supply, tradeoffs