▁first ▁as ▁an ▁Ass istant ▁Professor ▁and ▁then ▁as ▁an ▁Associ ate ▁Professor ▁of ▁Political ▁Science ▁for ▁a ▁total ▁of ▁five ▁years . ▁In ▁ 1 9 9 1 , ▁she ▁began ▁teaching ▁in ▁the ▁Political ▁Science ▁department ▁at ▁Washington ▁University ▁in ▁St . ▁Louis . ▁Ep stein ▁served ▁as ▁the ▁Chair ▁of ▁the ▁Political ▁Science ▁department ▁from ▁ 1 9 9 5 ▁to ▁ 1 9 9 9 ▁and ▁then ▁again ▁in ▁ 2 0 0 3 . ▁In ▁ 1 9 9 8 , ▁she ▁was ▁appointed ▁as ▁the ▁Mall in ck rod t ▁Dist ingu ished ▁University ▁Professor ▁of ▁Political ▁Science ▁and ▁served ▁in ▁that ▁role ▁until ▁ 2 0 0 6 . ▁She ▁also ▁taught ▁in ▁the ▁Washington ▁University ▁Law ▁School ▁as ▁a ▁Professor ▁of ▁Law ▁from ▁ 2 0 0 0 ▁to ▁ 2 0 0 6 . ▁From ▁ 2 0 0 6 ▁to ▁ 2 0 1 1 , ▁Ep stein ▁taught ▁at ▁North western ▁University , ▁first ▁as ▁the ▁Be atrice ▁Ku hn ▁Professor ▁of ▁Law , ▁and ▁next ▁a ▁university - wide ▁chair ▁as ▁the ▁Henry ▁W ade ▁Rog ers ▁Professor . ▁Next , ▁from ▁ 2 0 1 1 ▁to ▁ 2 0 1 5 , ▁she ▁served ▁as ▁the ▁Prov ost ▁Professor ▁of ▁Law ▁and ▁Political ▁Science ▁and ▁the ▁R ader ▁Family ▁Trust ee ▁Chair ▁in ▁Law ▁at ▁the ▁University ▁of ▁Southern ▁California . ▁In ▁ 2 0 1 5 , ▁she ▁returned ▁to ▁Washington ▁University ▁in ▁St . ▁Louis ▁and ▁was