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 authors write that state tax revenue has fallen as a share of the economy and that recent tax increases have not brought in adquate revenue. Tax increases enacted during the economic downturn are far fewer and smaller than the tax cuts enacted during the economic expansion of the 1990s. The...

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...

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....

The authors say the states will lose revenue if they conform to the part of the American Job Creation Act of 2004 that provides for a deduction for "qualified production activities." The authors suggest that the states consider decoupling from that provision

The goal of developing a firmer theoretical understanding of inhomogeneous temporal processes–in particular, the waiting times in some collective dynamical system–is attracting significant interest among physicists. Quantifying the deviations between the waiting-time distribution and the...

The long term performance and durability evaluation of a compression ignition (CI) engine of a diesel power generator using ultra-low sulfur diesel (ULSD) and Synthetic Paraffinic Kerosene, (S-8) fuels have been investigated under military specifications. The brake specific fuel consumptions...