December 2002A debt of heartfelt thanks is owed to my advisor, Larry D. Browning, without whose steadfast encouragement this dissertation would never have been written. My family, including daughter Susan and her husband Henry McClain, son Gregory and his wife Victoria, and son Brian and his wife Clarissa, have been sources of support and understanding. My grandchildren, Sean and Patrick McClain, and Cameron, Caleb, and soon-to-be sibling, have been wellsprings of vitality and inspiration. My husband Paul L. Shetler, has been my unfailing pillar of strength in all ways. Without his financial backing, emotional affirmation, and intellectual stimulation, the major fulfillments of my life, including this dissertation, could not have been accomplished. I dedicate this work to Paul, with gratitude and love. COMPLEX ADAPTIVE SYSTEMS
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