ON THE RELIABILITY AND VALIDITY OF SELF‐REPORTED ILLEGAL EARNINGS: IMPLICATIONS FOR THE STUDY OF CRIMINAL ACHIEVEMENT*

The study of the monetary returns to criminal activity is a central component in many emerging areas of criminology, including rational choice and offender decision‐making, desistance, and criminal achievement. Scholars have been increasingly captivated with specification of the earnings function and with examining how variations in illegal earnings predict important outcomes such as persistence in offending. The potential utility of findings in related empirical studies hinges on the quality of the key measure, self‐reported illegal earnings. Yet to date scant attention has been paid by researchers to the measurement properties of this metric. We analyze self‐reported illegal earnings generated from a variety of instrumental crimes by using data from the Pathways to Desistance Study (n = 585) and the National Supported Work Project (n = 1,509), which are two longitudinal data sets of active offenders separated by more than 30 years. Findings based on analyses both within and between data sets reveal support for the internal consistency reliability and criterion validity of self‐reported illegal earnings. Moreover, the results reveal premiums in terms of higher earnings associated with different crime types, which are persistent both over time and across data sets. Implications and future directions for advancing the theoretical study of criminal achievement are also discussed.     

THE IMPACT OF OUT-OF-STATE PRISON POPULATION ON STATE HOMICIDE RATES: DISPLACEMENT AND FREE-RIDER EFFECTS*

Past studies of the impact of prison population on homicide rates have produced widely divergent results. Those using state-level data find small impacts, but those using national data find very large ones. We use displacement/free-rider theory to explore the difference between these results. Displacement, in the current context, refers to a criminal's movement away from states with higher imprisonment rates. Free riding occurs when a state benefits from criminals being incarcerated in other states. If the displacement effect holds, a state's prison population has a stronger impact on crime within the state than would be accomplished by deterrence and incapacitation alone. If the free-rider effect holds, higher prison populations outside the state reduce homicide in the state because criminals are incapacitated elsewhere. Using vital statistics data for 1929 to 1992, we conduct separate homicide regressions for each state using both in-state and out-of-state prison population as independent variables. We find that the out-of-state variable has a much larger (negative) association with homicide, indicating substantial free riding. We also find evidence of a small displacement impact.     

WHO SHOULD GO AND WHO SHOULD STAY

The need for more efficient use of probation services is widely accepted. Indeed, many offenders are being incarcerated who might have been better served on probation. However, the percentage of incarcerated offenders who perhaps should have been retained in the community has been open to question The purpose of this study was to provide a bench mark as to the percentage of incarcerated offenders who might be better served on probation.