请问各位大神，我要做DEA三阶段模型，做第二阶段用frontier4.1，最小二乘法的结果如下，请问如何看是不是显著，显著水平是多少？
Output from the program FRONTIER (Version 4.1c)

instruction file = eg1-ins.txt
data file =        me.txt      

Error Components Frontier (see B&C 1992)
The model is a production function
The dependent variable is not logged

the ols estimates are :

                 coefficient     standard-error    t-ratio

  beta 0        -0.38090693E+04  0.64587223E+04 -0.58975585E+00
  beta 1         0.97347906E+00  0.19635078E+01  0.49578569E+00
  beta 2         0.21255701E+02  0.85014898E+02  0.25002325E+00
  beta 3         0.19912452E+03  0.31719556E+03  0.62776578E+00
  sigma-squared  0.50820919E+05

log likelihood function =  -0.72720754E+02

the estimates after the grid search were :

  beta 0        -0.37764613E+04
  beta 1         0.97347906E+00
  beta 2         0.21255701E+02
  beta 3         0.19912452E+03
  sigma-squared  0.33403863E+05
  gamma          0.50000000E-01
  mu             0.00000000E+00
   eta is restricted to be zero