* SUR - Repeated Measures with Changing Covariates;

data winer;



group    x1    x2    z1    y1    z2    y2    gr1    gr2    gr3

--------------------------------------------------------------

  1       1     0     3     8     4    14     1      0      0

  1       1     0     5    11     9    18     1      0      0

  1       1     0    11    16    14    22     1      0      0

  1       0     1     2     6     1     8     0      1      0

  1       0     1     8    12     9    14     0      1      0

  1       0     1    10     9     9    10     0      1      0

  1      -1    -1     7    10     4    10     0      0      1

  1      -1    -1     8    14    10    18     0      0      1

  1      -1    -1     9    15    12    22     0      0      1



* (Revised);

data winer1;



person    g    b     x     y

----------------------------

   1      1    1     3     8

   1      1    2     4    14

   2      1    1     5    11

   2      1    2     9    18

   3      1    1    11    16

   3      1    2    14    22

   4      2    1     2     6

   4      2    2     1     8

   5      2    1     8    12

   5      2    2     9    14

   6      2    1    10     9

   6      2    2     9    10

   7      3    1     7    10

   7      3    2     4    10

   8      3    1     8    14

   8      3    2    10    18

   9      3    1     9    15

   9      3    2    12    22