This paper estimates the causal effect of police on traffic fatalities and injuries. Due to simultaneity, estimating the causal effect of police on crime is often difficult. We overcome this obstacle by focusing on a mass layoff of Oregon State Police in February of 2003, stemming from changes...

Recently, Batabyal et al. (2005) have used a queuing model to show that there is a tension between economic cost minimization and inspection stringency in invasive species management in the following sense: Greater (lesser) inspection stringency with a larger (smaller) number of inspectors leads...

Recently, Batabyal et al. (2005) have used a queuing model to show that there is a tension between economic cost minimization and inspection stringency in invasive species management in the following sense: Greater (lesser) inspection stringency with a larger (smaller) number of inspectors leads...