*abortion example from Clogg 1982 (AJS)
*Data from Table 5 - page 125
man 2
dim 5 4  
lab A S
mod {A,S, ass2(A,S,5a)} * RC II model 
dat [44  11  38  62
     59  41 147 293
     23  11  13  27
     27   8  16  27
     258 57 105 110]
dum 1 1