We are deeply grateful for the support and encouragement that have come to us from many quarters during our work on this manuscript.
For financial support we are specifically indebted to the National Energy Program Evaluation Conference; the Office of the Vice President for Research and the Humanities Fund, Auburn University; and the College of Agriculture and Life Sciences at the University of Vermont. We acknowledge, with thanks, the editorial advice given by Kenneth Keating, Nancy E. Collins, Linda Schuck, Martin Kushler, and Fred Sissine. We greatly appreciate the unflagging support of Professor Stuart Nagel and Eric Valentine for this project; and the support and encouragement given by Deans Gordon Bond and Lawrence Forcier; and Professor Ted Becker. Finally, we acknowledge, with pleasure, the invaluable and expert secretarial assistance of Virginia Prickett. As always, the authors are solely responsible for issues of fact and interpretation.