▁dis sert ation ▁studying ▁the ▁functional - typ ological ▁system ▁of ▁word ▁formation ▁in ▁eight ▁languages ▁of ▁the ▁P ano ▁family , ▁including ▁Mat is , ▁was ▁published ▁by ▁Rap ha el ▁August o ▁O live ira ▁Barb osa . ▁The ▁paper ▁features ▁a ▁thorough ▁comparison ▁of ▁the ▁semantic ▁and ▁morph ological ▁properties ▁of ▁word ▁formation ▁among ▁the ▁different ▁P ano ▁languages , ▁with ▁a ▁specific ▁focus ▁on ▁aff ix ation , ▁redu p lication ▁and ▁composition . ▁ ▁While ▁no ▁large ▁eth n ography ▁specifically ▁about ▁the ▁Mat is ▁community ▁has ▁been ▁published , ▁information ▁about ▁their ▁culture ▁and ▁custom s ▁can ▁be ▁gained ▁through ▁multiple ▁eth n ographic ▁studies ▁and ▁compar isons ▁written ▁about ▁larger ▁regional ▁or ▁lingu istic ▁group ings ▁of ▁languages . ▁  J av ari ▁details ▁the ▁eight ▁eth nic ▁groups ▁living ▁around ▁the ▁V ale ▁do ▁J av ari . ▁Barbara ▁M aison na ve ▁Ar isi ’ s ▁ 2 0 0 7 ▁master ’ s ▁th esis ▁studies ▁the ▁relationship ▁between ▁the ▁Mat is ▁and ▁the ▁Kor ub o , ▁both ▁relatively ▁isolated ▁groups ▁living ▁in ▁the ▁V ale ▁do ▁J av ari . ▁All ▁previously ▁listed ▁literature ▁from ▁Rog ér ico ▁and ▁Vit ória ▁Fer re ira ▁include ▁eth no - histor ies ▁of ▁the ▁Mat is ▁people ▁as ▁background ▁for ▁the ▁studies , ▁most ▁not ably ▁in ▁the ▁text ▁Est ú d io ▁Lex ical ▁da ▁L í ng ua ▁Mat ís : ▁Sub s íd ios ▁para ▁um ▁D icion ário ▁Bil