@unpublished{GrimmGruebelSchmidtetal.2023, author = {Veronika Grimm and Julia Gr{\"u}bel and Martin Schmidt and Alexandra Schwartz and Ann-Kathrin Wiertz and Gregor Z{\"o}ttl}, title = {On a Tractable Single-Level Reformulation of a Multilevel Model of the European Entry-Exit Gas Market with Market Power}, institution = {Friedrich-Alexander-Universit{\"a}t Erlangen-N{\"u}rnberg}, pages = {26}, year = {2023}, }