@unpublished{KleinertLabbePleinetal.2019, author = {Kleinert, Thomas and Labb{\´e}, Martine and Plein, Fr{\"a}nk and Schmidt, Martin}, title = {There's No Free Lunch: On the Hardness of Choosing a Correct Big-M in Bilevel Optimization}, series = {Operations Research}, journal = {Operations Research}, number = {68(6)}, url = {https://opus4.kobv.de/opus4-trr154/264}, pages = {1716 -- 1721}, year = {2019}, language = {en}, type = {Preprint}, institution = {TRR 154} }