政府对公共信用的最优供给

Government’sOptimalSupplyofPublicTrust¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶abababa+baba(a-a)b(b-b)aabbaa/bb/a/b/baaa(a-a,)-¶a/¶a¶a/¶=0abaa=bbbb-b,-¶b/¶b¶b/¶=0babb=aababa*b***=a*b*aba(a-a,ab)b(b-b,ab)-¶a/¶a¶a/¶¶b/¶=0-¶b/¶b¶b/¶¶a/¶=0aoboab¶a/¶¶b/¶-¶a/¶a¶a/¶-¶a/¶a¶a/¶aaa=ab=abbbbaabb-aa(a+-a,ab)-¶a/¶a¶a/¶=0¶a/¶a=0¶a/¶a=0¶a/¶=0aa=bbb(b+-b,ab)-¶b/¶b¶b/¶=0¶b/¶b=0¶b/¶b=0¶b/¶=0bb=aababa*b*aba(a+-a,ab)b(b+-b,ab)-¶a/¶a¶a/¶¶b/¶=0-¶b/¶b¶b/¶¶a/¶=0¶a/¶a¶b/¶b=0aοbο=aοbοaa(a-a,)=Aa()+B()(a-a)bb(b-b,)=Ab()+B()(b-b)B()ab¶a/¶¶/¶(a-a)()+¶b/¶¶/¶(b-b)=0¶a/¶¶b/¶+¶/¶(-)()=0ab