Jirjahn, Uwe; Pfeifer, Christian; Tsertsvadze, Georgi - In: Applied economics letters 16 (2009) 10/12, pp. 1049-1052
If students tend to choose instructors with high teaching ability, a negative link between class size and student performance may remain obscured until this kind of sorting has been taken into account. Using data from student evaluation surveys, we confirm that it is crucial to control for...
