Hello,
Please check out the link below to obtain the details about the binary probit model that QLIM estimates.
http://go.documentation.sas.com/?docsetId=etsug&docsetTarget=etsug_qlim_details01.htm&docsetVersion=14.3&locale=en
As you see there, the probit model has an underlying latent model
y* = x’beta + epsilon
where y* cannot be observed but we can observe y and the relationship between y and y* is based on
y = 1 if y* >0
y = 0 otherwise
When you say “the PROBIT regression coefficients” I understand that you are referring to beta in this model. There are no particular restrictions on beta as they are the regression coefficients from an unobserved linear model.
When it comes to the second part of your question, it is true that the keywords like the model options change into the blue color to indicate that they are keywords but if this does not work do not worry. As long as you are not getting an error in the log window, you are not making a mistake for that option.
I hope this helps,
Gunce
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