Jail and prison populations in the United States have continued to gro
w unabated during the past two decades but crime rates have not declin
ed Partly in response to the pressures caused by burgeoning correction
al populations, the use of alternatives to incarceration has expanded
An ongoing debate centers on the effectiveness of these alternatives.
Many criminal justice professionals and some researchers question whet
her such alternatives seriously restrict the criminal justice system's
ability to incapacitate the active offender. This study deals specifi
cally with two alternatives to incarceration: probation and parole. We
examine offender recidivism for a sample of probationers and parolees
active in New Orleans, Louisiana, and offer a new approach to address
ing the effectiveness issue. Past research has evaluated the effective
ness of alternatives by examining failure rates of diverted offenders.
High failure rates, we argue, do not necessarily imply a significant
loss of the incapacitative effects of imprisonment. We suggest that a
more appropriate measure of the loss of incapacitative effect is the p
roportion of all offenses committed by persons on probation or parole.
Our results suggest that such losses are surprisingly low. The policy
implications of our findings are discussed.