> By most measures, productivity growth in the education sector over the last several decades has been low or even negative;[40][41] the average student-teacher

> By most measures, productivity growth in the education sector over the last several decades has been low or even negative;[40][41] the average student-teacher ratio in American universities, for instance, was sixteen to one in 2011, just as it was in 1981.[37] Yet, over this period, tuition costs have risen substantially. I'm just a layman, but this method of measuring "productivity" in education is absolutely bonkers and seems to treat the actual education received by each student as a fungible commodity. Thus a student in a "Rock Music History" class is roughly equivalent to a student in Quantum Physics 401. Is this how economists actually think of education?