nd ers ▁Pe ir ce ." ▁In ▁ 1 9 8 7 , ▁he ▁graduated ▁with ▁a ▁Ph . D . ▁in ▁econom ics ▁from ▁Harvard ▁and ▁won ▁the ▁David ▁A . ▁Well s ▁prize ▁for ▁the ▁best ▁Harvard ▁dis sert ation ▁in ▁econom ics . ▁He ▁became ▁an ▁assistant ▁professor ▁at ▁University ▁of ▁Michigan ▁in ▁ 1 9 8 7 ▁and ▁an ▁associate ▁professor ▁in ▁ 1 9 9 3 . ▁In ▁ 1 9 9 9 ▁he ▁also ▁became ▁research ▁professor ▁at ▁the ▁University ▁of ▁Michigan ' s ▁Survey ▁Research ▁Center . ▁He ▁gave ▁the ▁H . ▁Ch ase ▁Stone ▁L ect ure ▁at ▁Colorado ▁College ▁in ▁ 2 0 0 9 , ▁held ▁the ▁Jon ▁M . ▁Hun ts man ▁President ial ▁Vis iting ▁Professor ship ▁at ▁Ut ah ▁State ▁University ▁in ▁May ▁ 2 0 1 1 , ▁and ▁gave ▁the ▁Gene va ▁R isk ▁Econom ics ▁L ect ure ▁in ▁September , ▁ 2 0 1 3 . ▁He ▁gave ▁one ▁of ▁two ▁ke yn ote ▁speech es ▁at ▁the ▁Bank ▁of ▁England ▁Chief ▁Econom ists ' ▁Work shop ▁on ▁" The ▁Future ▁of ▁M oney " ▁in ▁May ▁ 2 0 1 5 . ▁ ▁Kim ball ▁married ▁G ail ▁C oz z ens , ▁daughter ▁of ▁Matthew ▁C oz z ens ▁and ▁V esa ▁Adams ▁C oz z ens , ▁on ▁August ▁ 2 4 , ▁ 1 9 8 4 . ▁ ▁Research ▁contribution ▁▁ ▁His ▁general ▁areas ▁of ▁expert ise ▁are ▁macro e conom