nl exp3: lnoutput lnk
(obs = 100)

Iteration 0:  residual SS =   95.5643
Iteration 1:  residual SS =  94.93565
Iteration 2:  residual SS =  94.34448
Iteration 3:  residual SS =  92.46364
Iteration 4:  residual SS =  92.40098
Iteration 5:  residual SS =  92.40074
Iteration 6:  residual SS =  92.40072
Iteration 7:  residual SS =  92.40072
Iteration 8:  residual SS =  92.40072
Iteration 9:  residual SS =  92.40072
Iteration 10:  residual SS =  92.40072
Iteration 11:  residual SS =  92.40072
Iteration 12:  residual SS =  92.40072

      Source |       SS       df       MS
-------------+------------------------------         Number of obs =       100
       Model |  28.1100773     2  14.0550387         R-squared     =    0.2333
    Residual |  92.4007205    97  .952584748         Adj R-squared =    0.2174
-------------+------------------------------         Root MSE      =  .9760045
       Total |  120.510798    99  1.21728079         Res. dev.     =  275.8842

3-parameter asymptotic regression, lnoutput = b0 + b1*b2^lnk
------------------------------------------------------------------------------
    lnoutput |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
option bmat() not allowed

请问这是什么问题呀?