Hi, I am working on the Klein-Spady semiparametric estimator. I am trying to use call NLPNRA to generate a maximum likelihood estimate. IML gives an ERROR message saying that I am taking log of zero. But I checked the arguments in all the log commands, none of them is zero. Below is the program and the error message. Thanks for your help. ERROR: (execution) Invalid argument to function. operation : LOG at line 296 column 45 operands : _TEM1008 _TEM1008 1 row 1 col (numeric) 0 statement : ASSIGN at line 296 column 1 traceback : module LOGLIK at line 296 column 1 ERROR: NEWRAP Optimization cannot be completed. ERROR: The function value of the objective function cannot be computed at the starting point.
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