help needed

[Mia Franzen]

Dear all,

I please need help! I did a Discrete Choice Experiment and out of the responses I did a dataset. See below. Now I try to fit in the datas in Stata. But unfortunately I (almost) always get an error. Like this for example:
. cmset id Cset alt
note: case identifier _caseid generated from id and Cset.
note: panel by alternatives identifier _panelaltid generated from id and alt.
at least one choice set has more than one instance of the same alternative
r(459);

Can you please see if in my data set something is wrong?

Thank you very much in advance!

[Andrew Musau]

What is this variable "alt"? The error message is exactly what it states.

at least one choice set has more than one instance of the same alternative
r(459);

id=1 and Cset=3 has alt=1 twice. Perhaps you meant

cmset id Cset Alt

as the last variable in the sequence defines alternatives present in the choice set.

In future, please have more informative titles as other people benefit from discussions in Statalist, and one way they can find relevant information is through the titles of the threads.

[Nick Cox]

What you are showing looks like a spreadsheet display to me. It's best to show directly what Stata sees using dataex.