@misc{PfaehlerLambert2017, author = {Wilhelm Pf{\"a}hler and Peter Lambert}, title = {Die Messung von Progressionswirkungen}, volume = {1991}, institution = {Lehrstuhl f{\"u}r Volkswirtschaftslehre}, series = {WHU-Forschungspapier}, number = {004}, type = {workingpaper}, pages = {128}, year = {2017}, }