st: Finding individuals that had the same ranking across choices.

["sanja_lutzeyer@ncsu.edu" <slutzey@ncsu.edu>]

My apologies.... here is an example of the data. Below I show two
individuals (id 1 and id 2). The first individual always has the same
ranking across the 8 choices.... 3, 2, 1.
The second individual has different choices for different questions.
I want to generate an indicator for individuals who, like id 1 in this
case, always have the same ranking across choices.
I hope this makes more sense?

id choice alt ranking
1     1      1     3
1     1      2     2
1     1      3     1
1     2      1     3
1     2      2     2
1     2      3     1
1     3      1     3
1     3      2     2
1     3      3     1
1     4      1     3
1     4      2     2
1     4      3     1
1     5      1     3
1     5      2     2
1     5      3     1
1     6      1     3
1     6      2     2
1     6      3     1
1     7      1     3
1     7      2     2
1     7      3     1
1     8      1     3
1     8      2     2
1     8      3     1
2     1      1     3
2     1      2     2
2     1      3     1
2     2      1     2
2     2      2     1
2     2      3     3
2     3      1     3
2     3      2     1
2     3      3     2
2     4      1     1
2     4      2     2
2     4      3     3
2     5      1     3
2     5      2     2
2     5      3     1
2     6      1     3
2     6      2     1
2     6      3     2
2     7      1     2
2     7      2     3
2     7      3     1
2     8      1     1
2     8      2     3
2     8      3     2
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