New York Police Department (NYPD) Stop, Question, and Frisk Database, 2006 (ICPSR 21660)

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.

Access Notes

  • The public-use data files in this collection are available for access by the general public. Access does not require affiliation with an ICPSR member institution.


NEW YORK POLICE DEPARTMENT (NYPD) STOP, QUESTION, AND FRISK DATABASE, 2006 - Download All Files (2843.704 MB) large file
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Study Description


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.

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  • EndNote XML (EndNote X4.0.1 or higher)


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

Subject Terms:    police, police citizen interactions, search and seizure

Smallest Geographic Unit:    precinct

Geographic Coverage:    New York City, New York (state), United States

Time Period:   

  • 2006

Date of Collection:   

  • 2007-03

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 Type(s):    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.


Sample:    inap.

Weight:    none

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.

Restrictions: This data collection may not be used for any purpose other than statistical reporting and analysis. Use of these data to learn the identity of any person or establishment is prohibited.


Original ICPSR Release:   2008-06-09

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