Paul Rappoport, associate economics professor at the Fox School of Business, presented a paper on wireless-only households on June 2 at the Sixth World Mobility Roundtable in Marina del Rey, California. His paper, which featured a Philadelphia perspective, was co-authored with Michael Goetz, associate professor of economics at the Fox School of Business, and Jim Alleman, a department chair and professor of civil, construction and environmental engineering at Iowa State University.