 We've been tracking how cities across the U.S. are changing to meet the future of how we live and work. This includes a push for more affordable housing, new jobs, and investment in public transit or green space. Another thing, new sports stadiums. The idea is that an arena or ballpark attracts visitors and creates jobs. But these projects typically have a lot of public dollars propping them up. From the taxpayer point of view, what is the cost-benefit?