Benjamin Hansen

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This paper estimates the causal effect of police on traffi c fatalities and injuries. Due to simultaneity, estimating the causal effect of police enforcement on crime is often diffi cult. We overcome this obstacle by focusing on a mass layoff of the Oregon State Police in February of 2003, stemming from Measure 28. Due solely to budget cuts, 35 percent of(More)
This paper reports on research conducted in public health settings with young people who have serious mental health issues. An easy to use feedback system for clinicians providing psychotherapy was assessed against treatment as usual. Data were collected on four widely used outcome measures. There has been little previous research in this area. We found(More)
The large excess fraction of diffi cult-to-diagnose injuries on Monday was originally thought to reflect employees’use of workers’compensation to cover weekend injuries. However, there has been mixed evidence found supporting this notion. This paper takes advantage of substantial reforms in California which both made filing false claims more diffi cult and(More)