▁North ▁Carolina ▁at ▁Chap el ▁Hill ▁from ▁ 1 9 7 4 ▁to ▁ 1 9 8 7 . ▁He ▁also ▁had ▁visit ing ▁positions ▁at ▁the ▁University ▁of ▁Heidel berg , ▁the ▁University ▁of ▁Wisconsin , ▁and ▁the ▁National ▁Heart , ▁L ung , ▁and ▁Blood ▁Institute . ▁Car roll ▁has ▁been ▁a ▁full ▁professor ▁of ▁Statistics , ▁N ut r ition ▁and ▁To xic ology ▁at ▁Texas ▁A & M ▁University ▁since ▁ 1 9 8 7 , ▁was ▁head ▁of ▁the ▁Department ▁of ▁Statistics ▁from ▁ 1 9 8 7 ▁to ▁ 1 9 9 0 , ▁and ▁was ▁named ▁a ▁Dist ingu ished ▁Professor ▁in ▁ 1 9 9 7 . ▁He ▁has ▁visit ing ▁appoint ments ▁at ▁the ▁Australian ▁National ▁University , ▁the ▁H umb old t ▁University ▁in ▁Berlin ▁and ▁the ▁National ▁Can cer ▁Institute . ▁He ▁was ▁the ▁found ing ▁director ▁of ▁the ▁Texas ▁A & M ▁Center ▁for ▁Statist ical ▁Bio in format ics , ▁and ▁has ▁been ▁the ▁director ▁of ▁Texas ▁A & M ▁Institute ▁for ▁App lied ▁Mathemat ics ▁and ▁Comput ational ▁Science ▁since ▁ 2 0 1 0 . ▁He ▁holds ▁an ▁honor ary ▁doctor ate ▁from ▁the ▁Institut ▁de ▁Statist ique , ▁Univers ité ▁C athol ique ▁de ▁Lou v ain ▁in ▁Belg ium . ▁ ▁Car roll ' s ▁many ▁areas ▁of ▁research ▁include ▁measurement ▁error ▁model , ▁non param et ric ▁and ▁sem ip aram et ric ▁regression , ▁inverse ▁problem , ▁functional ▁data ▁analysis , ▁case - control