▁protection ist ▁policy , ▁but ▁the ▁Supreme ▁Director ▁restored ▁free ▁trade ▁once ▁more . ▁Thus , ▁the ▁economy ▁of ▁the ▁Río ▁de ▁la ▁Pl ata ▁became ▁one ▁of ▁the ▁most ▁open ▁econom ies ▁in ▁the ▁world . ▁ ▁Between ▁ 1 8 1 2 ▁and ▁ 1 8 1 6 ▁divisions ▁developed ▁between ▁a ▁Un itar ist ▁fa ction ▁cent red ▁on ▁Buenos ▁Aires ▁and ▁a ▁Federal ist ▁fa ction ▁in ▁the ▁provinces , ▁which ▁eventually ▁led ▁to ▁a ▁series ▁of ▁civil ▁wars ▁that ▁ended ▁with ▁the ▁con quest ▁of ▁Buenos ▁Aires ▁by ▁Federal ist ▁ca ud ill os ▁at ▁the ▁Battle ▁of ▁C ep eda ▁in ▁ 1 8 2 0 . ▁ ▁Each ▁province ▁had ▁its ▁own ▁money , ▁and ▁the ▁same ▁money ▁had ▁a ▁different ▁value ▁from ▁one ▁province ▁and ▁another , ▁and ▁even ▁among ▁cities ▁in ▁the ▁same ▁province . ▁ ▁The ▁government ▁of ▁Martín ▁Rodríguez ▁( 1 8 2 0 – 1 8 2 4 ) ▁and ▁his ▁minister ▁Bernard ino ▁Riv ad avia , ▁then ▁Las ▁Her as ▁and ▁finally ▁Riv ad avia ▁himself ▁as ▁the ▁first ▁president ▁of ▁Argentina ▁from ▁ 1 8 2 6 ▁to ▁ 1 8 2 7 , ▁developed ▁an ▁economic ▁plan ▁de emed ▁as ▁" The ▁happy ▁experience ". ▁This ▁plan ▁increased ▁the ▁British ▁influence ▁in ▁the ▁national ▁politics . ▁It ▁was ▁based ▁on ▁five ▁main ▁pill ars : ▁complete ▁free ▁trade ▁and ▁no ▁protection ist ▁policies ▁against ▁British ▁imports , ▁fin ance ▁with ▁a ▁central ▁bank ▁managed ▁by ▁British ▁invest