* Selecting a Covariance Structure;

data models;



 type$      aic_r     bic_r    m2rll    parms    model

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

 UN        -321.0    -361.2    586.1      28        1

 AR(1)     -330.7    -333.6    657.5       2        2

 ARH(1)    -314.9    -326.4    613.8       8        3

 CS        -349.2    -352.0    694.3       2        4

 CSH       -339.1    -350.6    662.2       8        5

 HF        -341.7    -353.2    667.5       8        6

 FA(1)     -333.8    -353.9    639.6      14        7

 FA1(1)    -343.8    -355.3    671.6       8        8

 RC        -339.1    -344.8    670.1       4        9

 RCQ       -329.9    -340.0    645.8       7       10

 I-I       -317.2    -327.3    620.4       7       11