the final mle estimates are :
coefficient standard-error t-ratio
beta 0 -0.16374349E+00 0.34711337E+00 -0.47172915E+00
beta 1 0.72471519E+00 0.73871935E-01 0.98104265E+01
beta 2 0.35722825E+00 0.23974050E-01 0.14900621E+02
sigma-squared 0.14348760E+00 0.34889837E-01 0.41125901E+01
gamma 0.99999999E+00 0.20432057E-02 0.48942698E+03
mu 0.60957134E+00 0.96312207E-01 0.63291182E+01
eta is restricted to be zero
log likelihood function = -0.55888481E+02
LR test of the one-sided error = 0.12257630E+02
with number of restrictions = 2
[note that this statistic has a mixed chi-square distribution]
number of iterations = 14
(maximum number of iterations set at : 100)
number of cross-sections = 182
上图是我用frontier做的结果，用的是14个地区，13年的数据，谁能帮忙给解释下这个结果呀、，不胜感激
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