▁became ▁especially ▁important ▁for ▁Par s ons ▁was ▁Ernst ▁D . ▁Tro elt sch ▁( 1 8 6 5 – 1 9 2 3 ). ▁Par s ons ▁also ▁read ▁widely ▁on ▁Cal vin ism . ▁His ▁reading ▁included ▁the ▁work ▁of ▁Em ile ▁Dou mer que , ▁Eug é ne ▁Ch ois y , ▁and ▁Henri ▁Haus er . ▁ ▁Early ▁academic ▁career ▁ ▁Harvard ▁ ▁Econom ics ▁Department ▁In ▁ 1 9 2 7 , ▁after ▁a ▁year ▁of ▁teaching ▁at ▁Am her st ▁( 1 9 2 6 – 1 9 2 7 ), ▁Par s ons ▁entered ▁Harvard , ▁as ▁an ▁instruct or ▁in ▁the ▁Econom ics ▁Department , ▁where ▁he ▁followed ▁F .   W . ▁T auss ig ' s ▁lect ures ▁on ▁tags ▁econom ist ▁Alfred ▁Marshall ▁and ▁became ▁friends ▁with ▁the ▁econom ist ▁historian ▁Ed win ▁Gay , ▁the ▁founder ▁of ▁Harvard ▁Business ▁School . ▁Par s ons ▁also ▁became ▁a ▁close ▁associate ▁of ▁Joseph ▁Sch ump eter ▁and ▁followed ▁his ▁course ▁General ▁Econom ics . ▁Par s ons ▁was ▁generally ▁at ▁odd s ▁with ▁some ▁of ▁the ▁tr ends ▁in ▁Harvard ' s ▁department ▁which ▁then ▁went ▁in ▁a ▁highly - techn ical ▁and ▁a ▁mathematical ▁direction . ▁Par s ons ▁looked ▁for ▁other ▁options ▁at ▁Harvard ▁and ▁gave ▁courses ▁in ▁" So cial ▁Eth ics " ▁and ▁in ▁the ▁" So ci ology ▁of ▁Religion ". ▁Although ▁Par s ons ▁entered ▁Harvard ▁through ▁the ▁Econom ics ▁Department , ▁he ▁never ▁wanted ▁ ▁Harvard