"In this book, Professors Bernholz and Vaubel have edited a volume that asks a very important question: how does competition between and among political units influence regulatory outcomes? The contributions complement each other very well and cover a wide array of theoretical ideas, compare a variety of institutional settings, and summarize a huge amount of empirical work. They also find that often elusive trait of combining technically sound and detailed summaries with readability and an eye toward the bigger picture." Brian Goff, Western Kentucky University