a particularly standard case of this function u(x1,x2,.IL ∑a which yields f oc pi Again if the price of good 1 is one, this tells us: no xo=no1xi- for all i.(n. b. this is actually the same as the C.E.s. utility function wai p oi =o, then xi LA particularly standard case of this function is ux1, x2,... xL   i1 L ixi i which yields f.o.c. iixi i1  pi Again if the price of good 1 is one, this tells us: ii pi xi i1  11 p1 x1 11 for all i. (n.b. this is actually the same as the C.E.S. utility function) If i  , then xi  wi 1 1 pi 1 1 j1 L pj  1 j 1 1