Competitive equilibrium o Pareto Optimal( pareto efficient ◆ An allocation(x;…x:…y) is Pareto efficient( optimal if there isn't any the other feasible allocation (xi,. yi, yn) made u (x,)2u,(x) for any i and u, (x)>(x) for some i See the figCompetitive equilibrium Pareto Optimal ( Pareto efficient ) : An allocation is Pareto efficient ( optimal ) if there isn’t any the other feasible allocation , made for any i and for some i. See the fig. 1 1 ( , ; , ) I J x x y y     1 1 ( , ; , ) I J x x y y ( ) ( ) i i u u x x   ( ) ( ) i i u u x x  