▁of ▁inter state ▁commerce . ▁F ares ▁immediately ▁dropped ▁from ▁$ 7 ▁to ▁$ 3 . ▁ ▁See ▁also ▁Non - cont est able ▁market ▁Free ▁market ▁Government - gr anted ▁mon opol y ▁Government ▁mon opol y ▁Natural ▁mon opol y ▁Reg ul atory ▁capture ▁R ent ▁seeking ▁ ▁Notes ▁and ▁references ▁ ▁External ▁links ▁ ▁The ▁Question ▁of ▁Mon opol ies ▁Nathan iel ▁Br anden ▁defines ▁and ▁discuss es ▁co er ci ve ▁mon opol y ▁Ant it rust ▁Policy ▁As ▁Corpor ate ▁W elf are ▁by ▁C ly de ▁Wayne ▁C rew s ▁Jr ▁" Co er ci ve ▁mon opol y ▁power ▁does ▁not ▁emer ge ▁from ▁the ▁trans itory ▁out comes ▁of ▁the ▁volunt ary ▁ex changes ▁that ▁compr ise ▁the ▁market place . ▁It ▁is ▁hoped ▁that ▁polic ym akers ▁will ▁come ▁to ▁recognize ▁that ▁government ▁cannot ▁protect ▁the ▁public ▁from ▁mon opol y ▁power , ▁because ▁it ▁is ▁the ▁source ▁of ▁such ▁power ." ▁Ant it rust ▁La ws ▁Harm ▁Cons um ers ▁and ▁St if le ▁Compet ition ▁by ▁Edward ▁W . ▁You n kins ▁" a ▁co er ci ve ▁mon opol y ▁is ▁closed ▁entry ▁that ▁can ▁only ▁be ▁achieved ▁by ▁an ▁act ▁of ▁government ▁inter vention ▁in ▁the ▁form ▁of ▁special ▁reg ulations , ▁subs id ies , ▁or ▁franch ises " ▁Ant it rust ▁by ▁Alan ▁Gre ens pan ▁exam ines ▁" wh ether ▁active ▁competition ▁does ▁in ev it ably ▁lead ▁to ▁the ▁establishment ▁of ▁co er ci ve ▁mon