Public goods Continuous case G=f(81+g2) l1(f(g1+g2),W-g) Social welfare function W=a1+(1-a)2Public goods • Continuous case: • Social welfare function: 1 2 G f g g = + ( ) 1 2 ( ( ), ) i i i u f g g w g + − 1 2 W au a u = + − (1 )