Hello
I am trying to use conditional logit model in order to see why people go to a specific neighborhood. to do so I have people characteristics (age and gender which is as1 and 2) and also the place characteristics(the employment rate).
I used the following syntax:

asclogit choice employment, casevars(gender age) case(id) alternatives(place)
a sample of my data is :


id choice gender age employment place
1 0 0 0 0.16 1
1 0 0 0 0.3 2
1 1 2 31 0.15 3
2 1 1 40 0.16 1
2 0 0 0 0.3 2
2 0 0 0 0.15 3
3 0 0 0 0.16 1
3 1 1 23 0.3 2
3 0 0 0 0.15 3
4 1 2 45 0.16 1
4 0 0 0 0.3 2
4 0 0 0 0.15 3
5 0 0 0 0.16 1
5 0 0 0 0.3 2
5 1 1 30 0.15 3


but I got this message:
"no cases remain after removing invalid observation"

can anyone help me?