Dear All

I conducted a choice experiment concerning eco labelled seafood where individuals were given 8 choice tasks in total consisting of four options per choice card where one was a none option.

I thus have 32 rows per respondent. Below I insert a screenshot of what my data looks like.

When I try run the code asclogit Choice Countryoforigin HarvestMethod SustainabilityLabel Price, case(Task) alternatives(Option) vce(cluster Person) an error stating variable Option has replicate levels for one or more cases; this is not allowed. Could someone please let me know what I am doing wrong.

Many thanks
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