When you say "In general, the main effect of homogeneous attrition is likely to be that it makes
your sample unrepresentative." is that just because it makes the sample size smaller? Not knowing much about sample size (presumably that is coming later in the book), it seems like it might be useful to say something here about what makes a sample size too small (even if only as a preview for later sections).
When you say "In general, the main effect of homogeneous attrition is likely to be that it makes your sample unrepresentative." is that just because it makes the sample size smaller? Not knowing much about sample size (presumably that is coming later in the book), it seems like it might be useful to say something here about what makes a sample size too small (even if only as a preview for later sections).