▁T rag edy ▁of ▁the ▁ant ic omm ons ▁T rag edy ▁of ▁the ▁comm ons ▁V oting ▁par ado x ▁Zero - sum ▁game ▁ ▁References ▁ ▁Further ▁reading ▁▁ ▁Kop el man , ▁S ., ▁We ber , ▁M , ▁& ▁Mess ick , ▁D . ▁( 2 0 0 2 ). ▁Fact ors ▁In fl uen cing ▁Co operation ▁in ▁Commons ▁D ile mm as : ▁A ▁Review ▁of ▁Ex perimental ▁Psych ological ▁Research . ▁In ▁E . ▁Ost rom ▁et ▁al ., ▁( Ed s .) ▁The ▁D rama ▁of ▁the ▁Commons . ▁Washington ▁DC : ▁National ▁Academy ▁Press . ▁Ch . ▁ 4 ., ▁ 1 1 3 – 1 5 6 ▁ ▁External ▁links ▁Home page ▁of ▁the ▁social - d ile m ma ▁network ▁ ▁Category : D ile mm as ▁Category : Group ▁processes ▁Category : M oral ▁psych ology ▁Category : So cial ▁psych ology ▁Category : So cial ▁responsibility <0x0A> </s> ▁D il an ▁Den iz ▁G ök ç ek ▁ İ ş can ▁( born ▁ 1 9 7 6 ) ▁is ▁a ▁Turkish ▁female ▁ref eree ▁and ▁sports ▁instruct or ▁from ▁profession . ▁She ▁is ▁a ▁FIFA ▁listed ▁woman ▁ref eree ▁since ▁ 2 0 0 5 . ▁ ▁G ök ç ek ' s ▁interest ▁in ▁football ▁began ▁through ▁her ▁elder ▁brother . ▁Six ▁sister s ▁used ▁to ▁watch ▁all ▁football ▁matches ▁with ▁their ▁elder ▁brother , ▁and ▁listen ▁to ▁his ▁comments . ▁Her ▁elder ▁sister ▁K ad ri ye