This article presents the authors' rejoinder to the comments of Howard Bloom, Derek Neal, and Mike Seltzer on their article. Their commentary focused foremost on the advantages and disadvantages of using Options A, B, or C in using instrumental variables in multisite trials. Of interest are the quantities one can estimate and test in each case,…

This paper explores, from the perspective of a local practitioner, phases and effects of implementing a national education demonstration project at the local level. The pivotal role of the locality, its history and its economic realities, is emphasized. Drawing from her experience in planning and implementing a demonstration effort in a…