The Penn Institute for Urban Research develops knowledge in three critical areas: innovative urban development strategies; building the sustainable and inclusive 21st-century city; and the role of anchor institutions in urban places. It builds essential collaborations among scholars, policy-makers and designers, both on and off the University of Pennsylvania's campus. Since 2006, the Institute has published 28 titles in its "City in the Twenty-First Century" series, including Revitalizing America's Cities and Design After Decline: How America Rebuilds Shrinking Cities.