Hi,
I am using tsls function from sem package to estimate a model which includes
large number of data. Among its predictors, it has a nominal data which has
about 10 possible values. So I expand this parameter into 9-binary-value
predictors with the coefficient of base value equals 0. I also have another
continuous predictor.
The problem is that, whenever I run the tsls, I will get 'System is
computationally singular' error all the time. I'm wondering if there is anyway
that I can overcome this problem? Please kindly suggest. Thank you so much in
advance.
- adschai
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