Common trends in the US state-level crime. What do panel data say?

This paper aims to investigate the long-run relationship between crime, inequality, unemployment and deterrence using state-level data for the US over the period 1978- 2013. The novelty of the paper is to use non-stationary panels with factor structures. The results show that: i) a simple crime model well fits the long run relationship; ii) income inequality and unemployment have a positive impact on crime, whereas deterrence displays a negative sign; iii) the effect of income inequality on crime is large in magnitude; iv) property crime is generally highly sensitive to deterrence measures based upon police activities