Has the rapid increase in mobile phone usage contributed to traffic fatalities in the United States? Does legislation requiring drivers to use hands-free technology while talking have any effect on traffic fatalities? Using state-level panel data on mobile phone ownership, hands-free laws, and...

We use new establishment-level data and geographic mapping methods to improve upon evaluations of the effectiveness of state enterprise zones, focusing on California's program. Because zone boundaries do not follow census tracts or zip codes, we created digitized maps of original zone boundaries...