DOI: 10.3886/icpsr34883.v1
title: A Natural Experiment in Reform: Analyzing Drug Law Policy in New York City, New York, Quantitative Data, 2006-2012
title: Version 1

description: On January 1, 2011, the Vera Institute of Justice (Vera) launched "A Natural Experiment in Reform: Analyzing Drug Law Policy in New York," which was funded by the National Institute of Justice, and conducted by Vera, with the John Jay College of Criminal Justice at the City University of New York, and the School of Criminal Justice at Rutgers University. This study sought to analyze the effects of recent changes in drug offense sentencing laws in New York State (NYS) and chronicle New York City's experience with drug law reform (DLR). This includes changes in sentencing outcomes for felony drug cases, reoffending, and cost implications, with the hope of informing NYS policy makers, and provide other states across the nation with research to inform their own DLR efforts.
Specifically, this study revolves around the following objectives: 1) describe how the DLR is reflected in actual sentencing outcomes and the extent to which practices of judges, lawyers, and defense attorneys have shifted in response to the reforms; 2) investigate how treatment diversion impacts reoffending and 3) analyze the cost implications of changing drug law sentencing policies. Researchers analyzed administrative data to describe the impacts of reforms on sentencing decisions, collected New York City arrest data for drug felonies between October 1, 2006 and September 30, 2011, and evaluated outcome data measuring recidivism and costs between pre and post DLR periods.
Numerous variables tracking offenders' progress through the criminal justice system were collected including admission to the Drug Treatment Alternative to Prison (DTAP) program, arrest and disposition jurisdictions, charges, sentencing, and drug court screening and admission. Arrestees' criminal history and rearrest figures, as well as their sex, race, and ethnic demographics were collected also.
description: Researchers conducted analyses centered around three research questions: implementation, reoffending, and cost-benefit analysis. Implementation was assessed through a quasi-experimental design by examining all arrest cases on A through E felony drug charges and specified property charges during two periods: one prior to DLR (January - September, 2008) and one following DLR (January - September, 2010). Propensity Score Matching (PSM) was used to control for the downward trend in felony drug arrests during 2008 through 2010, and for baseline differences between arrestees including demographics, borough of arrest and case disposition, index charge, and criminal history. Sentencing and treatment diversion outcomes were compared for pre and post-DLR groups.
Reoffending was examined by collecting administrative data from the New York State Division of Criminal Justice Services to track recidivism for a pre-DLR sample who received jail, prison, or probation sentences prior to reform, and a post-DLR sample of people who were diverted to treatment post-DLR. PSM was used to select individuals with similar characteristics in each sample to reduce the effect of confounding variables. Pre and post-DLR sentenced groups were followed, from a minimum of 12 months, to a maximum of 35 months following disposition. Researchers also controlled for the incapacitation effect of jail, prison, and residential treatment on offenders.
 Vera's Cost-Benefit Analysis Unit performed a cost-benefit analysis (CBA) based on results from the implementation and reoffending analyses. First, the CBA used data from the implementation analysis to examine citywide costs and benefits, comparing taxpayer costs for handling felony drug arrests in New York City pre and post-DLR. Second, the CBA examined whether drug treatment diversion was cost-effective compared to jail, prison, or probation sentences. This facet also assessed whether justice resources and victim costs offset the cost of increased use of drug treatment services.
description: The Felony Drug Arrest Trends dataset includes all arrest cases in New York City on A through E arrest category drug felonies, between October 1, 2006 and March 31, 2011. Additional information includes variables regarding charges, sentencing, drug court screening and admission, arrest history, disposition county, arrestees' demographics, and criminal history. Data were updated to June 2012.
The Drug Court Screening dataset combines all cases screened for drug court eligibility, either from the matched felony drug sample (Felony Drug File), or matched specified property sample (Property Charge File). Variables describing arrest history, sentencing, disposition, drug court history, and drug use. Race, ethnicity, and sex demographics are included as well.
The Felony Drug File dataset includes all arrest cases in New York City on A through E arrest category drug felonies, between January 1, 2008 and September 30, 2008, and cases disposed before April 7, 2009; and all cases arrested in New York City on A through E drug felonies between January 1, 2010 and September 30, 2010 and cases disposed before April 7, 2011. Information includes admission to the DTAP program, charges, sentencing, drug court screening and admission, arrest and disposition jurisdictions. Arrestees' sex, race, and ethnicity demographics, as well as criminal history and rearrests instances were included as well. Data were updated to November 30, 2012.
The Property Charge File dataset includes all cases indicted in New York City on specified property charges between January 1, 2008 and September 30, 2008 and cases disposed before April 7, 2009; and arrested and indicted in New York City on specified property charges between January 1, 2010 and September 30, 2010 and cases disposed before April 7, 2011. Information includes admission to the DTAP program, charges, sentencing, drug court screening and admission, arrest and disposition jurisdictions. Arrestees' sex, race, and ethnicity demographics, as well as criminal history and rearrests instances were included as well. The data were updated to November 30, 2012.
The Reoffending Sample dataset includes all individuals indicted in New York City on B through E arrest category drug felonies and property charges with no prior violent convictions between January 1, 2008 and December 31, 2008, and sentenced to prison, jail, probation or sentenced as split sentences or time served before April 7, 2009 (Pre-DLR sentenced cases); All individuals indicted in New York City on B through E drug felonies or specified property charges with no prior violent convictions between January 1, 2010 and December 31, 2010, and diverted to drug court before November 30, 2011 (Post DLR diverted cases). Information includes admission to the DTAP program, charges, sentencing, drug court screening and admission, arrest and disposition jurisdictions. Arrestees' sex, race, and ethnicity demographics, as well as criminal history and rearrests instances were included as well. The data were updated to November 30, 2012.
description: Not applicable
description: Response Rates: Not applicable
description: Presence of Common Scales: none
description: Datasets: 
DS0: Study-Level Files
DS1: Felony Drug Arrest Trends
DS2: Drug Court Screening
DS3: Felony Drug File
DS4: Property Charge File
DS5: Reoffending Sample
description: Individuals arrested for A through E drug felonies and specified property offenses in New York City from October 1, 2006 to November 30, 2012. Smallest Geographic Unit: City
description: record abstracts