Darrell R. Lewis, Charles C. Orvis, A Training System for Graduate Student Instructors of Introductory Economics at the University of Minnesota, The Journal of Economic Education, Vol. 5, No. 1, Evaluation of Teaching (Autumn, 1973), pp. 38-46
No takes yet. Share an insight, caveat, or question.
Lewis et al. (1973) studied this question.
Synapse has enriched one closely related paper. Consider it for comparative context: