▁to ▁change ▁this ▁setup ▁into ▁an ▁econom ically ▁more ▁advantage ous ▁setting . ▁For ▁r ul ers ▁it ▁is ▁often ▁the ▁rational ▁choice ▁to ▁stick ▁to ▁this ▁property ▁rights ▁setup , ▁thereby ▁being ▁able ▁to ▁extract ▁more ▁from ▁their ▁domin ion ▁than ▁by ▁fost ering ▁economic ▁development . ▁The ▁second ▁internal ▁approach ▁focus es ▁directly ▁on ▁resource ▁end ow ments ▁within ▁the ▁specific ▁regions . ▁Labor ▁scarc ity ▁until ▁the ▁ 2 0 th ▁century ▁combined ▁with ▁a ▁relatively ▁low ▁quality ▁of ▁so ils ▁lead ▁to ▁an ▁extensive ▁way ▁of ▁far ming , ▁largely ▁re lying ▁on ▁vast ▁amounts ▁of ▁land ▁rather ▁than ▁on ▁int ensive ▁use ▁of ▁labor ▁on ▁the ▁land . ▁Com b ined ▁with ▁bad ▁institutions ▁from ▁pre colon ial ▁or ▁colonial ▁times ▁this ▁economic ▁setup ▁h ind ers ▁the ▁extensive ▁use ▁of ▁technology ▁and ▁thereby ▁slow ing ▁down ▁or ▁even ▁prevent ing ▁economic ▁development . ▁ ▁Modern ▁era ▁ ▁Most ▁African ▁econom ies , ▁especially ▁sub - S ah aran ▁Africa ▁st agn ated ▁during ▁this ▁time ▁and ▁the ▁period ▁ended ▁with ▁many ▁of ▁Africa ' s ▁national ▁econom ies ▁in ▁ru ins ▁partly ▁due ▁to ▁l op - s ided ▁trade ▁with ▁the ▁rest ▁of ▁the ▁world . ▁Some ▁have ▁argued ▁that ▁economic ▁decl ine ▁has ▁been ▁caused ▁by ▁the ▁med d ling ▁in ▁the ▁internal ▁affairs ▁of ▁African ▁states ▁by ▁the ▁IM F ▁and ▁World ▁Bank . ▁Africa ▁also ▁experienced ▁major ▁govern ance ▁def ic ien cies , ▁mis management ▁and ▁cor ruption , ▁and ▁this ▁acceler