Studies in the economics of crime literature have reached mixed conclusions on the deterrence hypothesis. One explanation that has been offered for the failure to find evidence of a deterrent effect in the long run is the natural rate of crime. This article applies univariate unit root tests to...

This study reviews the empirical literature on the integration properties of energy consumption and production. The survey begins with a discussion of the implications of whether energy variables contain a unit root and proceeds to examine how results differ according to the specific unit root...