National Archive of Criminal Justice Data
This dataset is maintained and distributed by the National Archive of Criminal Justice Data (NACJD), the criminal justice archive within ICPSR. NACJD is primarily sponsored by three agencies within the U.S. Department of Justice: the Bureau of Justice Statistics, the National Institute of Justice, and the Office of Juvenile Justice and Delinquency Prevention.
Alternate Title: NYPD SQF Database
Principal Investigator(s): New York City Police Department
These data were originally collected by New York Police Department officers and record information gathered as a result of stop question and frisk (SQF) encounters during 2006. These data were used in a study carried out, under contract to the New York City Police Foundation, by the Rand Corporation's Center on Quality Policing. The release of the study, "Analysis of Racial Disparities in the New York Police Department's Stop, Question, and Frisk Practices" (Rand Document TR-534-NYCPF, 2007) generated interest in making the data available for secondary analysis. This data collection contains information on the officer's reasons for initiating a stop, whether the stop led to a summons or arrest, demographic information for the person stopped, and the suspected criminal behavior.
These data are freely available.
WARNING: This study is over 150MB in size and may take several minutes to download on a typical internet connection.
New York City Police Department. New York Police Department (NYPD) Stop, Question, and Frisk Database, 2006. ICPSR21660-v1. Ann Arbor, MI: Inter-university Consortium for Political and Social Research [distributor], 2008-06-18. http://doi.org/10.3886/ICPSR21660.v1
Persistent URL: http://doi.org/10.3886/ICPSR21660.v1
This study was funded by:
- New York City Police Department
- United States Department of Justice. Office of Justice Programs. Bureau of Justice Statistics
Scope of Study
Smallest Geographic Unit: precinct
Date of Collection:
Unit of Observation: police-citizen encounter
Universe: All street encounters between New York Police Department officers and citizens within New York City resulting in completion of NYPD form UF250 (Unified Form 250) during 2006.
Data Types: administrative records data
Data Collection Notes:
At the request of the NYPD, several variables were removed from the original data file. These variables reflected notes made by NYPD officers during stop-question-frisk encounters, and thus contained potentially identifying information about officers and suspects.
Mode of Data Collection: record abstracts
Response Rates: Not applicable.
Presence of Common Scales: none
Extent of Processing: ICPSR data undergo a confidentiality review and are altered when necessary to limit the risk of disclosure. ICPSR also routinely creates ready-to-go data files along with setups in the major statistical software formats as well as standard codebooks to accompany the data. In addition to these procedures, ICPSR performed the following processing steps for this data collection:
- Performed consistency checks.
- Checked for undocumented or out-of-range codes.
Original ICPSR Release: 2008-06-09
- Citations exports are provided above.
Export Study-level metadata (does not include variable-level metadata)
If you're looking for collection-level metadata rather than an individual metadata record, please visit our Metadata Records page.