The authors point out that state tax systems have become more regressive in the past decade. Taxes in many states have become relatively more burdensome to low- and moderate-income families and relatively less burdensome on the affluent than they were before the last recession, the authors say....

New streams of data are being generated by a range of in-situ instrumentation, mobile sensing, and social media that can be integrated and analyzed to better understand urban activity and mobility patterns. While several studies have focused on understanding activity patterns and flows of people...

The accurate estimation of workday length is essential to estimate total labor supply, and has a significant bearing on the assessment of labor productivity and worker well-being. Using probe request data from a 53 access-point, publicly-accessible Wi-Fi network in the Lower Manhattan district...