Comments on an article by Kotelchuck and colleagues concerning the benefits of WIC participation on pregnancy outcomes. Raises methodological considerations, especially the effects of duration of WIC participation and benefits, and the problem of matching study subjects with controls. (GC)

The Commonwealth of Massachusetts has had a competency-based vocational instructor approval process for more than two and one-half decades. Perhaps the most important element in this process has been the vocational competency testing. Although some say that Massachusetts is out of step, others feel that Massachusetts has a well-established testing…