▁M IT ▁fac ulty ▁in ▁ 1 9 9 1 . ▁ ▁A ▁study ▁by ▁Pre le c ▁and ▁Dun can ▁Sim ester ▁showed ▁that ▁people ▁bu ying ▁tick ets ▁to ▁sport ing ▁events ▁would ▁be ▁willing ▁to ▁pay ▁significantly ▁higher ▁prices ▁using ▁credit ▁cards ▁than ▁they ▁would ▁for ▁c ash ▁purch ases . ▁Pre le c ▁also ▁de vised ▁a ▁system ▁for ▁el ic iting ▁more ▁truth ful ▁answers ▁to ▁pol ls ▁based ▁on ▁pa ired ▁questions ▁in ▁which ▁one ▁question ▁of ▁each ▁pair ▁asks ▁about ▁the ▁respond ent ' s ▁own ▁opinion ▁and ▁the ▁other ▁asks ▁the ▁respond ent ▁to ▁estimate ▁others ' ▁opinions . ▁Pre le c ▁is ▁of ▁Cro at ian ▁descent . ▁ ▁References ▁ ▁Category : 1 9 5 5 ▁birth s ▁Category : M ass achusetts ▁Institute ▁of ▁Technology ▁fac ulty ▁Category : Har vard ▁University ▁al umn i ▁Category : 2 1 st - century ▁American ▁econom ists ▁Category : L iving ▁people ▁Category : MIT ▁Slo an ▁School ▁of ▁Management ▁fac ulty ▁Category : American ▁people ▁of ▁Cro at ian ▁descent ▁Category : S cient ists ▁from ▁Zag reb <0x0A> </s> ▁I on ▁Drag ou mis ▁( ; ▁September ▁ 1 4 , ▁ 1 8 7 8 ▁– ▁July ▁ 3 1 , ▁ 1 9 2 0 ) ▁was ▁a ▁Greek ▁diplom at , ▁phil os opher , ▁writer ▁and ▁revolution ary . ▁ ▁Biography ▁Born ▁in ▁Ath ens , ▁Drag ou mis ▁was ▁the ▁son ▁of ▁Steph anos ▁Drag ou mis