Proposition 57 creates opportunities for the release of thousands of state prisoners through the expansion of parole eligibility and good conduct and programming credits. When 64% of voters approved the measure in November 2016, there were few details about how it would be implemented. During the 2017–18 budget process, the California Department of Corrections and Rehabilitation (CDCR) outlined implementation plans and population estimates, and now we have a better sense of the potential impact of this measure on the prison population.
Proposition 57 will significantly reduce the number of prison inmates—and, in combination with other statewide criminal justice reforms over the past six years, it will enable the system to keep its inmate population below the court-ordered cap of 137.5% of design capacity. Overall, Proposition 57 is expected to reduce the population by more than 2,600 inmates in 2017‒18, with a net cost savings of nearly $40 million. Long-term estimates put the population impact at 11,500 by 2020–21, for an annual savings of more than $180 million.
CDCR’s new parole regulations exclude prisoners who are serving a term for a violent felony (as defined by Penal Code 667.5), required to register as sex offenders under Penal Code 290, serving life sentences, or on death row. Eligible offenders receive parole consideration after serving full sentences for their primary offenses (their longest sentences). These offenders are no longer required to serve sentence enhancements for gang activity or prior prison terms. The state estimates that this new process—which went into effect on July 1—will reduce the prison population by almost 500 offenders in fiscal year 2017–18.
CDCR has also created additional educational and rehabilitative programming and increased the amount of credits inmates can earn for both good behavior and program completion. For example, in 2015 there were 95 career technical education programs (including training in auto repair, home construction and maintenance, and office technology); now there are 197 programs, with new classes in almost every career tech area.
Good behavior credits were expanded for almost all eligible inmates on May 1, 2017. The expanded programming credits will take effect August 1, 2017. The state estimates that these additional credit earning opportunities will reduce the prison population by more than 2,100 in the 2017–18 fiscal year.
State officials believe that Proposition 57 will allow them to keep the prison population below the cap while maintaining public safety. In addition to monitoring Proposition 57’s effect on public safety, recidivism, and costs, corrections officials and policymakers should pay close attention to the supply, demand, and—most importantly—effectiveness of the education and rehabilitation programs offered to inmates to ensure that the measure’s goals are realized.
The measure required that the first transfer of savings occur by August 2016. This first transfer totaled more than $67 million and went to the three agencies tasked with distributing the grants (Table 1). The first grants were awarded this month. It’s estimated that nearly $46 million in savings will be transferred for fiscal year 2017–18. By 2019–20, long-term savings will be $75 million annually.
The initiative is the latest of a number of reforms adopted since 2009, when a federal court issued a mandate to reduce overcrowding in the state’s prison system to improve inmate health care. Over the past several years, the total prison population has declined by about 41,000. At 113,700, the institutional population is now almost 2,200 below the court-mandated target of 137.5% of design capacity. Early in 2016, however, the prison population began to increase, and is now about 1,900 higher than it was at the end of January. If this average monthly increase of more than 200 inmates continues, the prison population could be above the mandated target within a year.
In 2014, Proposition 47 reclassified several property and drug crimes from felonies to misdemeanors. These offenses are also committed by a greater share of women than men. As with realignment, Proposition 47 had a greater impact on women than men, and women appear to have more greatly benefited. One year after the proposition passed, the percentage of women in custody for Proposition 47 offenses dropped from 32% to 16%. The percentage of men in custody for Proposition 47 offenses dropped from 22% to 12%. In other words, a greater proportion of Proposition 47 offenders were women, and the share of women in jail dropped by a greater percentage after the proposition. The racial and ethnic composition of female offenders did not change across the reforms.
These budget allocations reflect a striking shift from California’s budget of forty years ago, when the state spent a larger share on higher education and a much smaller share on corrections. But by the 2008–2009 budget year, allocations to higher education (11.1%) and corrections (10.7%) were almost identical. In the years since, higher education spending has outpaced corrections in relative terms, largely because recent criminal justice reforms have drawn down the number of adults in state custody and on parole. Nonetheless, California spends more on corrections and less on higher education today, in relative terms, than at nearly any point in the past thirty years.

The data strongly indicate that Proposition 47 is a major factor in these changes. First, monthly arrest data show abrupt changes in drug and property arrests in November 2014, the month Proposition 47 went into effect. Second, the drop in felony arrests was almost exclusively for drug and property offenses, while the increase in misdemeanor arrests was almost entirely for drug and property offenses. Arrests for motor vehicle theft, which continues to be a felony after Proposition 47, is the only area of increase. Possibly in response to the 13% increase in auto thefts in 2015, motor vehicle theft arrests went up by 26%.

Because highly disadvantaged young men are detached from educational and labor market institutions, they are likely to be among the hardest to reach through traditional sites of enrollment. They are also disproportionately represented among people who are arrested and incarcerated in county jails and state prisons.