This is my equation. I'm using the binary logit method.osai a abw apq as avh br @expand(@csp) cust ea educ exm ff fls gas hhy hwq npp osn pbc pbu pks pla rpa s uid wm wtbu y (@pbu, @drop(7)) (@pbc, @drop(9))
I need to expand CSP into 5 dummy variables
and I need to drop all 7s from PBU and all 9s from PBC, because the answer is "this question does not apply to me".
I imagine that the above equation is a good start, but I'm having trouble expanding CSP and I'm not sure if dropping will work the way I have it. Thoughts?