▁Hor ow itz ▁family ▁Ben ven iste ▁family ▁C ohen ▁ ▁References ▁ ▁External ▁links ▁Ed essa ▁in ▁Jewish ▁Virtual ▁Library ▁Jewish ▁quarter ▁in ▁Ur fa ▁The ▁" U rf al im " ▁imm igr ant ▁group ▁on ▁R ish on ▁Le - Z ion ▁Digital ▁Family ▁Album ▁website . ▁▁▁ ▁Category : M iz ra hi ▁Jews ▁topics ▁Category : J ew ish ▁eth nic ▁groups <0x0A> </s> ▁Alfred ▁S . ▁E ich ner ▁( M arch ▁ 2 3 , ▁ 1 9 3 7 F ebru ary ▁ 1 0 , ▁ 1 9 8 8 ) ▁was ▁an ▁American ▁post - Ke yn esian ▁econom ist ▁who ▁challeng ed ▁the ▁ne oc lass ical ▁price ▁mechanism ▁and ▁assert ed ▁that ▁prices ▁are ▁not ▁set ▁through ▁supply ▁and ▁demand ▁but ▁rather ▁through ▁mark - up ▁pr icing . ▁ ▁E ich ner ▁is ▁one ▁of ▁the ▁found ers ▁of ▁the ▁post - Ke yn esian ▁school ▁of ▁econom ics ▁and ▁was ▁a ▁professor ▁at ▁R ut gers ▁University ▁at ▁the ▁time ▁of ▁his ▁death . ▁E ich ner ' s ▁writ ings ▁and ▁advoc acy ▁of ▁thought , ▁differ ed ▁with ▁the ▁theories ▁of ▁John ▁May n ard ▁Ke yn es , ▁who ▁was ▁an ▁advoc ate ▁of ▁government ▁inter vention ▁in ▁the ▁free ▁market ▁and ▁pro ponent ▁of ▁public ▁sp ending ▁to ▁increase ▁employ ment . ▁E ich ner ▁argued ▁that ▁invest ment ▁was ▁the ▁key ▁to ▁economic ▁expansion . ▁He ▁was ▁considered ▁an ▁advoc ate ▁of ▁the ▁concept