: S ports people ▁from ▁R iga <0x0A> </s> ▁Government ▁and ▁binding ▁( GB , ▁GB T ) ▁is ▁a ▁theory ▁of ▁syntax ▁and ▁a ▁phrase ▁structure ▁grammar ▁in ▁the ▁tradition ▁of ▁transform ational ▁grammar ▁developed ▁princip ally ▁by ▁No am ▁Ch om sky ▁in ▁the ▁ 1 9 8 0 s . ▁This ▁theory ▁is ▁a ▁radical ▁revision ▁of ▁his ▁earlier ▁theories ▁and ▁was ▁later ▁re vised ▁in ▁The ▁Min imal ist ▁Program ▁( 1 9 9 5 ) ▁and ▁several ▁subsequent ▁papers , ▁the ▁latest ▁being ▁Three ▁Fact ors ▁in ▁Language ▁Design ▁( 2 0 0 5 ). ▁Although ▁there ▁is ▁a ▁large ▁literature ▁on ▁government ▁and ▁binding ▁theory ▁which ▁is ▁not ▁written ▁by ▁Ch om sky , ▁Ch om sky ' s ▁papers ▁have ▁been ▁found ational ▁in ▁setting ▁the ▁research ▁ag enda . ▁ ▁The ▁name ▁refers ▁to ▁two ▁central ▁sub the ories ▁of ▁the ▁theory : ▁government , ▁which ▁is ▁an ▁abstract ▁s ynt actic ▁relation ▁applicable , ▁among ▁other ▁things , ▁to ▁the ▁assignment ▁of ▁case ; ▁and ▁binding , ▁which ▁de als ▁chief ly ▁with ▁the ▁relationships ▁between ▁pron oun s ▁and ▁the ▁expressions ▁with ▁which ▁they ▁are ▁co - refer ential . ▁GB ▁was ▁the ▁first ▁theory ▁to ▁be ▁based ▁on ▁the ▁principles ▁and ▁parameters ▁model ▁of ▁language , ▁which ▁also ▁under lies ▁the ▁later ▁develop ments ▁of ▁the ▁minimal ist ▁program . ▁ ▁Government ▁The ▁main ▁application ▁of ▁the ▁government ▁relation ▁concerns ▁the ▁assignment ▁of ▁case . ▁Government ▁is ▁defined ▁as ▁follows : ▁