Derived from the 2001 Santa Fe Institute Conference, "The Economy as an Evolving Complex System III," represents scholarship from the leading figures in th area of economics and complexity. The subject, a perennial centerpiece of the SFI program of studies has gained a wide range of followers for its methods of employing empirical evidence in the development of analytical economic theories. Accordingly, the chapters in this volume addresses a wide variety of issues in the fields of economics and complexity, accessing eclectic techniques from many disciplines, provided that they shed light on the economic problem. Dedicated to Kenneth Arrow on his 80th birthday, this volume honors his many contributions to the Institute. SFI-style economics is regarded as having had an important impact in introducing a new approach to economic analysis.