我做出的稳健性的豪斯曼检验是这个结果 选用什么效应呢
( 1)  o.mdlnm = 0
( 2)  mdlned = 0
( 3)  o.mdlndist = 0
( 4)  o.mdx = 0
( 5)  o.mdlnlf = 0
( 6)  mdlnpd = 0
( 7)  o.mdshock = 0
( 8)  mdfta = 0
( 9)  o.mddel = 0
(10)  o.mdneb = 0
(11)  mdlnfree = 0
(12)  o.mdt_i = 0
       Constraint 1 dropped
       Constraint 2 dropped
       Constraint 3 dropped
       Constraint 4 dropped
       Constraint 5 dropped
       Constraint 6 dropped
       Constraint 7 dropped
       Constraint 8 dropped
       Constraint 9 dropped
       Constraint 10 dropped
       Constraint 11 dropped
       Constraint 12 dropped

           chi2(  0) =       .
         Prob > chi2 =         .