▁co erc ion ▁A ▁corpor ation ▁which ▁successfully ▁eng ages ▁in ▁co erc ion ▁to ▁the ▁extent ▁that ▁it ▁elimin ates ▁the ▁possibility ▁of ▁competition , ▁oper ates ▁a ▁co er ci ve ▁mon opol y . ▁A ▁firm ▁may ▁use ▁illegal ▁or ▁non - e conom ic ▁methods , ▁such ▁as ▁ext ort ion , ▁to ▁achieve ▁and ▁retain ▁a ▁co er ci ve ▁mon opol y ▁position . ▁A ▁company ▁which ▁has ▁become ▁the ▁sole ▁supp lier ▁of ▁a ▁comm od ity ▁through ▁non - co er ci ve ▁means ▁( such ▁as ▁by ▁simply ▁out comp eting ▁all ▁other ▁fir ms ), ▁may ▁theoret ically ▁then ▁go ▁on ▁to ▁become ▁a ▁co er ci ve ▁mon opol y ▁if ▁it ▁maintain s ▁its ▁position ▁by ▁eng aging ▁in ▁co er ci ve ▁" bar riers ▁to ▁entry ." ▁The ▁most ▁famous ▁historical ▁examples ▁of ▁this ▁type ▁of ▁co er ci ve ▁mon opol y ▁began ▁in ▁ 1 9 2 0 , ▁when ▁the ▁E igh teenth ▁Am end ment ▁to ▁the ▁United ▁States ▁Constitution ▁went ▁into ▁effect . ▁This ▁period , ▁called ▁Pro hib ition , ▁presented ▁luc r ative ▁opportun ities ▁for ▁organized ▁crime ▁to ▁take ▁over ▁the ▁import ation ▁(" boot leg ging "), ▁manufact ure , ▁and ▁distribution ▁of ▁alco hol ic ▁be ver ages . ▁Al ▁Cap one , ▁one ▁of ▁the ▁most ▁famous ▁boot leg gers ▁of ▁them ▁all , ▁built ▁his ▁criminal ▁emp ire ▁largely ▁on ▁prof its ▁from ▁illegal ▁alco hol ,