
Dear Mr. or Ms.,
 
I used the R-software to run the zero-inflatoin negative binomial model, but I could not get the results. And the error message is "solve.default(as.matrix(fit$gaussian)) ". In the model, I introduced 3 dummy variables. I do not know the reasons fully.
 
I will be very appreciate if you can help me. Thank you.
 
Best regards,
 
Sincerely,
Xiongqing Zhang


      
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