用FRONTIER4.1基于SFA方法的结果如下
the final mle estimates are :
coefficient standard-error t-ratio
beta 0 0.58978394E+01 0.64185091E+00 0.91887997E+01
beta 1 0.51950252E+00 0.49312239E-01 0.10534961E+02
beta 2 0.53699762E+00 0.59139676E-01 0.90801583E+01
sigma-squared 0.25584273E+00 0.46578367E-01 0.54927373E+01
gamma 0.61807751E+00 0.13706887E+00 0.45092480E+01
mu is restricted to be zero
eta is restricted to be zero
log likelihood function = -0.12540154E+03
LR test of the one-sided error = 0.36358488E+01with number of restrictions = 1 [note that this statistic has a mixed chi-square distribution]