I would like to thank Springer Publishing Company and my editor, Joseph Morita, for their faith in this book and their support with editing, designing, and marketing. I am gratefully indebted to my primary mentor, Larry E. Lancaster, for his time, honest critique, and constant encouragement. Many thanks to Betsy Kennedy for her wisdom and guidance throughout the writing process. I want to thank Mia S. Wells for her patience with my unending questions about format and style. A very special thanks to Keith Douglas Wood for his expertise in designing graphics for the book. Last, but certainly not least, thanks to David Beckett Frese, whose support kept me well-balanced throughout the process.