Postulates of Preferences/Rationality ◆(A1) Orderability (x1x丌2)∨(1<丌2)V(丌1~丌2) ◆(A2) Transitivity (丌1>丌2)∧(丌2>丌3)→(丌1>丌3 ◆(A3) Continuity 1 2 a∈(0,1),丌2~[丌1:a:;73(1-a) ◆(A4) Monotonicity (x1>丌2)∧(a>B)→{x1:a;2:(1-a)>[r1:;丌2:(1-6) ◆(A5) Substitutability (丌1~丌2)∧a∈(0,1)→{m1:a;丌3:(1-a)~[x2:a:;a(1-a) ◆(A6) Decomposability ;x2:B;73:(1- MLA 2011, Tsinghua University 1:c;2:(1-a)6;丌3:(1-a)(1-6)Postulates of Preferences/Rationality (A1) Orderability (A2) Transitivity (A3) Continuity (A4) Monotonicity (A5) Substitutability (A6) Decomposability 13 MLA 2011, Tsinghua University