▁Ke yn es ▁implicitly ▁drew ▁upon ▁an ▁evolution ary ▁understanding ▁of ▁human ▁instinct . ▁ ▁In ▁ 2 0 0 9 , ▁econom ists ▁A ker lo f ▁and ▁Sh iller ▁ad vised ▁in ▁addition ▁that : ▁ ▁See ▁also ▁ ▁Be havior al ▁econom ics ▁ ▁Dec ision ▁making ▁ ▁Drive ▁theory ▁ ▁Notes ▁ ▁External ▁links ▁▁ ▁" An imal ▁spirits " ▁from ▁The ▁Econom ist ''' s ▁economic ▁terms ▁ ▁" A ▁special ▁report ▁on ▁the ▁future ▁of ▁fin ance : ▁Wild - an imal ▁spirits ", ▁The ▁Econom ist , ▁ 2 2 ▁January ▁ 2 0 0 9 ▁ ▁" An imal ▁Sp ir its ▁Dep end ▁on ▁Trust : ▁The ▁proposed ▁stim ulus ▁isn ' t ▁big ▁enough ▁to ▁restore ▁confidence " ▁by ▁Robert ▁J . ▁Sh iller , ▁The ▁Wall ▁Street ▁Journal , ▁ 2 7 ▁January ▁ 2 0 0 9 ▁ ▁Lo ew en stein , ▁George ▁and ▁ ▁Ted ▁O ' Don og h ue . ▁" An imal ▁Sp ir its : ▁A ffect ive ▁and ▁D eli ber ative ▁Process es ▁in ▁Econom ic ▁Be havior ", ▁Corn ell ▁University ▁Working ▁P aper ▁ 0 4 - 1 4 , ▁August ▁ 2 0 0 4 ▁ ▁In ▁ 2 0 1 3 , ▁N PR ' s ▁Planet ▁M oney '' ▁produced ▁a ▁video ▁series ▁and ▁web ▁site ▁following ▁the ▁making ▁of ▁a ▁te e ▁sh irt ▁that ▁they ▁designed , ▁featuring ▁a ▁visual ▁pun ▁on ▁Ke yn es '