log-form linear combination of variables in utility function
Posted: 03 Dec 2020, 00:25
Hi!
I would like to ask a utility specification question when estimating a logit model. Lets assume I have three variables (Var1, Var2, Var3) where Var 2 and Var 3 belong to a similar group and I would like to create a linear combination of them when specifying in the utility and they will enter to the utility function in a logarithmic form. In specifics, it will look like that:
U=Beta1*Var1+ln(Beta2*Var2+Beta3*Var3)
Is it possible to easily define this specification in Apollo?
Note that this is different than log-transforming each variable since the sum operation is inside the logarithm.
Many thanks in advance!
I would like to ask a utility specification question when estimating a logit model. Lets assume I have three variables (Var1, Var2, Var3) where Var 2 and Var 3 belong to a similar group and I would like to create a linear combination of them when specifying in the utility and they will enter to the utility function in a logarithmic form. In specifics, it will look like that:
U=Beta1*Var1+ln(Beta2*Var2+Beta3*Var3)
Is it possible to easily define this specification in Apollo?
Note that this is different than log-transforming each variable since the sum operation is inside the logarithm.
Many thanks in advance!