▁University ▁of ▁C ologne ▁as ▁an ▁under grad uate . ▁He ▁graduated ▁in ▁ 1 9 2 7 ▁with ▁a ▁th esis ▁on ▁the ▁Qu asi - rent ▁in ▁Alfred ▁Marsh alls ▁work ▁( ). ▁He ▁continued ▁his ▁studies ▁as ▁a ▁Ph . D . ▁student ▁in ▁econom ics ▁under ▁Er win ▁von ▁Be cker ath . ▁He ▁graduated ▁in ▁ 1 9 3 0 ▁with ▁a ▁dis sert ation ▁on ▁cost ▁theory ▁( ), ▁which ▁was ▁published ▁in ▁ 1 9 3 2 ▁in ▁Vienna . ▁In ▁ 1 9 3 4 ▁he ▁finished ▁his ▁hab il itation ▁on ▁market ▁structure ▁and ▁equilibrium ▁( ). ▁ ▁After ▁his ▁hab il itation ▁he ▁became ▁a ▁lect urer ▁at ▁the ▁University ▁of ▁C ologne . ▁After ▁one ▁sem ester ▁he ▁accepted ▁a ▁position ▁at ▁the ▁University ▁of ▁Berlin ▁where ▁he ▁taught ▁until ▁ 1 9 4 1 . ▁In ▁ 1 9 4 1 , ▁Stack el berg ▁became ▁professor ▁of ▁econom ics ▁at ▁the ▁University ▁of ▁Bonn . ▁In ▁ 1 9 4 4 , ▁Stack el berg ▁left ▁Germany ▁for ▁Spain , ▁where ▁he ▁became ▁a ▁visit ing ▁professor ▁at ▁the ▁Com pl ut ense ▁University ▁of ▁Madrid . ▁He ▁died ▁of ▁l ym ph oma ▁in ▁ 1 9 4 6 . ▁Stack el berg ▁was ▁a ▁member ▁of ▁the ▁Naz i ▁Party ▁since ▁ 1 9 3 1 ▁and ▁a ▁Sch ar führ er ▁( Ser ge ant ) ▁in ▁the ▁SS ▁since ▁ 1 9 3 3 . ▁However