Public goods Continuous case Benchmark max au,+(l-au g182 OG G a+(1-a) 02=(-a)m G G Ou,/auau/au → aG/ Ox, aG/axPublic goods • Continuous case: • Benchmark: 1 2 1 2 , max (1 ) g g au a u + − 1 2 1 1 1 2 2 2 (1 ) (1 ) (1 ) u u u a a a G G x u u u a a a G G x    + − =       + − = −    1 1 2 2 1 2 1 u u u u G x G x      + =    