This paper investigates the nature, and impact of the reporting bias associated with the police-reported crash data on inferences made using this data. In doing so, we merge a detailed emergency room data and police-reported crash data for a specific region in Denmark. To disentangle potentially...

The classical Ising model was used to re-create the ferromagnetic phenomenon in statistical mechanics. The model describes the behavior of atoms in a lattice. Each atom may interact only with its neighbors, and has two states called spins. When the atoms polarize their spins, the resulting...

Over the past year, the San Francisco Department of Parking and Traffic (DPT) conducted an intensive pedestrian-safety engineering study, the PedSafe Study. PedSafe was funded by the Federal Highway Administration (FHWA)*, which also funded companion studies in Las Vegas and Miami. The study was...

Foodborne disease outbreaks have a tremendous impact on society, including foodborne illnesses, hospitalizations, lost work time, and deaths. These food-safety events have a significant influence in shaping consumer's perception of risk. In food consumption, outbreaks of foodborne illnesses also...

Firms can sometimes preempt regulation by changing the nature, scale or location of their activities. The objectives of this paper are to model such preemptive behavior and to draw out implications for regulatory design. Applications to New Source Review are emphasized. Regulatory triggers...

This paper investigates the offsetting effect theory, using individual-level accident data to analyze how drivers respond to seat-belt laws. I find that drivers drive their vehicles more carefully when more stringent seat-belt laws are in effect. I also find that careful driving is not...

We empirically investigate the deterrent and offsetting effects of the introduction of a point-record driving license (PDRL) in Italy. We find that the PDRL resulted in a sharp reduction of seat belt offenses, and in a noticeable decrease of road accidents. However, the reduction in occupant...