CONTENTS: Brief 1. Overview / James L. Garrett — Brief 2. An urbanizing world / Martin Brockerhoff — Brief 3. Rural-urban interdependence / Ceclia Tacoli — Brief 4. Urban livelihoods and labor markets / Arjan de Haan — Brief 5. Feeding the cities: food supply and distribution / Olivio Argenti — Brief 6. The hidden significance of urban agriculture / Luc J.A. Mougeot — Brief 7. Urbanization and the nutrition transition / Barry M. Popkin — Brief 8. Urban women: balancing work and childcare / Patrice L. Engle — Brief 9. Threats to urban health / Carolyn Stephens — Brief 10. Programming for urban food and nutrition security / Timothy R. Frankenberger, James L. Garrett, and Jeanne Downen.