I am trying to fit the function:
Revenuei(time) = A0/(1+exp(-A1*(time-A2))) + B*Costsi
I have 5,000 observations of Revenue and Costs for 8 time periods (time = 0,1,...7).
A0, A1, A2, and B are constants that I am trying to fit.
I am unsure of how to fit this function in Stata using the nl command.
Does anybody have suggestions?
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