Acknowledgments
This study would not have been possible without the assistance of the Maricopa Association of Governments (MAG). We are grateful for its support with data and critiques. The authors of this study would also like to thank Professors Charles Redman and Jonathan Fink at Arizona State University for providing critical logistical and financial support for this project. Ray Quay and T. Velu also provided invaluable assistance in advising and in setting up the modeling environment. Additional funding was provided by a grant from the National Science Foundation (#SBE/SES-0438447).