the final mle estimates are :

                 coefficient     standard-error    t-ratio

  beta 0         0.23464205E+06  0.10007233E+01  0.23447244E+06

  beta 1         0.22724368E+01  0.35504294E+00  0.64004562E+01

  beta 2         0.64783527E+01  0.59439057E+00  0.10899151E+02

  beta 3         0.82657805E+00  0.76009894E-01  0.10874611E+02

  sigma-squared  0.23590803E+12  0.10000000E+01  0.23590803E+12

  gamma          0.73925688E+00  0.36836603E-01  0.20068541E+02

   mu is restricted to be zero

  eta           -0.68763199E-01  0.16667421E-01 -0.41256052E+01

log likelihood function =  -0.15392895E+04

LR test of the one-sided error =   0.51730814E+02

with number of restrictions = 2

[note that this statistic has a mixed chi-square distribution]