Police-Public Contact Survey, 2022 (ICPSR 38872)
The Police-Public Contact Survey (PPCS) provides detailed information on the nature and characteristics of face-to-face contacts between police and the public, including the reason for and outcome of the contact and the respondent's satisfaction with the contact. The data can be used to estimate the likelihood of different types of contact for residents with different demographic characteristics, including contacts involving the use of nonfatal force by police. The PPCS is used to collect data from a nationally representative sample of U.S. residents age 16 or older as a supplement to the National Crime Victimization Survey. To date, the PPCS has been conducted ten times by BJS:
1. 1996. Described in the BJS publication Police Use of Force: Collection of National Data (NCJ 165040).
2. 1999. Described in Contacts between Police and the Public: Findings from the 1999 National Survey (NCJ 184957). These data are archived as POLICE-PUBLIC CONTACT SURVEY, 1999: [UNITED STATES] (ICPSR 3151).
3. 2002. Described in Contacts between Police and the Public: Findings from the 2002 National Survey (NCJ 207845). These data are archived as POLICE-PUBLIC CONTACT SURVEY, 2002: [UNITED STATES] (ICPSR 4273).
4. 2005. Described in the BJS publication Contacts between Police and the Public, 2005 (NCJ 215243). These data are archived as POLICE-PUBLIC CONTACT SURVEY, 2005: [UNITED STATES] (ICPSR 20020).
5. 2008. Described in the BJS publication Contacts between Police and the Public, 2008 (NCJ 234599). These data are archived as POLICE-PUBLIC CONTACT SURVEY, 2008 (ICPSR 32022).
6. 2011. Split sample design due to instrument changes. New instrument findings described in two publications: Police Behavior During Traffic and Street Stops, 2011 (NCJ 242937) and Requests for Police Assistance, 2011 (NCJ 242938). These data are archived as POLICE-PUBLIC CONTACT SURVEY, 2011 (ICPSR 34276).
7. 2015. Described in the BJS publication Contacts between Police and Public, 2015 (NCJ 251145). These data are archived as POLICE-PUBLIC CONTACT SURVEY, 2015 (ICPSR 36653).
8. 2018. Described in the BJS publication Contacts between Police and Public, 2018. These data are archived as POLICE-PUBLIC CONTACT SURVEY, 2018 (ICPSR 37916).
9. 2020. Described in the BJS publication Contacts between Police and Public, 2020. These data are archived as POLICE-PUBLIC CONTACT SURVEY, 2020 (ICPSR 38320).
10. 2022. Described in the BJS publication Contacts between Police and Public, 2022. These data are archived as POLICE-PUBLIC CONTACT SURVEY, 2022 (ICPSR 38872).
Police-Public Contact Survey, 2020 (ICPSR 38320)
The Police-Public Contact Survey (PPCS) provides detailed information on the nature and characteristics of face-to-face contacts between police and the public, including the reason for and outcome of the contact and the respondent's satisfaction with the contact. The data can be used to estimate the likelihood of different types of contact for residents with different demographic characteristics, including contacts involving the use of nonfatal force by police. The PPCS is used to collect data from a nationally representative sample of U.S. residents age 16 or older as a supplement to the National Crime Victimization Survey. To date, the PPCS has been conducted nine times by BJS:
1. 1996. Described in the BJS publication Police Use of Force: Collection of National Data (NCJ 165040).
2. 1999. Described in Contacts between Police and the Public: Findings from the 1999 National Survey (NCJ 184957). These data are archived as POLICE-PUBLIC CONTACT SURVEY, 1999: [UNITED STATES] (ICPSR 3151).
3. 2002. Described in Contacts between Police and the Public: Findings from the 2002 National Survey (NCJ 207845). These data are archived as POLICE-PUBLIC CONTACT SURVEY, 2002: [UNITED STATES] (ICPSR 4273).
4. 2005. Described in the BJS publication Contacts between Police and the Public, 2005 (NCJ 215243). These data are archived as POLICE-PUBLIC CONTACT SURVEY, 2005: [UNITED STATES] (ICPSR 20020).
5. 2008. Described in the BJS publication Contacts between Police and the Public, 2008 (NCJ 234599). These data are archived as POLICE-PUBLIC CONTACT SURVEY, 2008 (ICPSR 32022).
6. 2011. Split sample design due to instrument changes. New instrument findings described in two publications: Police Behavior During Traffic and Street Stops, 2011 (NCJ 242937) and Requests for Police Assistance, 2011 (NCJ 242938). These data are archived as POLICE-PUBLIC CONTACT SURVEY, 2011 (ICPSR 34276).
7. 2015. Described in the BJS publication Contacts between Police and Public, 2015 (NCJ 251145). These data are archived as POLICE-PUBLIC CONTACT SURVEY, 2015 (ICPSR 36653).
8. 2018. Described in the BJS publication Contacts between Police and Public, 2018. These data are archived as POLICE-PUBLIC CONTACT SURVEY, 2018 (ICPSR 37916).
9. 2020. Described in the BJS publication Contacts between Police and Public, 2020. These data are archived as POLICE-PUBLIC CONTACT SURVEY, 2020 (ICPSR 38320).
Police-Public Contact Survey, 2018 (ICPSR 37916)
The Police-Public Contact Survey (PPCS) provides detailed information on the nature and characteristics of face-to-face contacts between police and the public, including the reason for and outcome of the contact and the respondent's satisfaction with the contact. The data can be used to estimate the likelihood of different types of contact for residents with different demographic characteristics, including contacts involving the use of nonfatal force by police. The PPCS is used to collect data from a nationally representative sample of U.S. residents age 16 or older as a supplement to the National Crime Victimization Survey. To date, the PPCS has been conducted eight times by BJS:
1. 1996. Described in the BJS publication Police Use of Force: Collection of National Data (NCJ 165040).
2. 1999. Described in Contacts between Police and the Public: Findings from the 1999 National Survey (NCJ 184957). These data are archived as POLICE-PUBLIC CONTACT SURVEY, 1999: [UNITED STATES] (ICPSR 3151).
3. 2002. Described in Contacts between Police and the Public: Findings from the 2002 National Survey (NCJ 207845). These data are archived as POLICE-PUBLIC CONTACT SURVEY, 2002: [UNITED STATES] (ICPSR 4273).
4. 2005. Described in the BJS publication Contacts between Police and the Public, 2005 (NCJ 215243). These data are archived as POLICE-PUBLIC CONTACT SURVEY, 2005: [UNITED STATES] (ICPSR 020020).
5. 2008. Described in the BJS publication Contacts between Police and the Public, 2008 (NCJ 234599). These data are archived as POLICE-PUBLIC CONTACT SURVEY, 2008 (ICPSR 32022).
6. 2011. Split sample design due to instrument changes. New instrument findings described in two publications: Police Behavior During Traffic and Street Stops, 2011 (NCJ 242937) and Requests for Police Assistance, 2011 (NCJ 242938). These data are archived as POLICE-PUBLIC CONTACT SURVEY, 2011 (ICPSR 34276).
7. 2015. Described in the BJS publication Contacts between Police and Public, 2015 (NCJ 251145). These data are archived as POLICE-PUBLIC CONTACT SURVEY, 2015 (ICPSR 36653).
8. 2018.Described in the BJS publication Contacts between Police and Public, 2018. These data are archived as POLICE-PUBLIC CONTACT SURVEY, 2018 (ICPSR 37916).
Police-Public Contact Survey, 2015 (ICPSR 36653)
The Police-Public Contact Survey (PPCS) provides detailed information on the nature and characteristics of face-to-face contacts between police and the public, including the reason for and outcome of the contact and the respondent's satisfaction with the contact. The data can be used to estimate the likelihood of different types of contact for residents with different demographic characteristics, including contacts involving the use of nonfatal force by police. The PPCS is used to collect data from a nationally representative sample of U.S. residents age 16 or older as a supplement to the National Crime Victimization Survey. To date, the PPCS has been conducted seven times by BJS:
1. 1996. Described in the BJS publication Police Use of Force: Collection of National Data (NCJ 165040).
2. 1999. Described in Contacts between Police and the Public: Findings from the 1999 National Survey (NCJ 184957). These data are archived as POLICE-PUBLIC CONTACT SURVEY, 1999: [UNITED STATES] (ICPSR 3151).
3. 2002. Described in Contacts between Police and the Public: Findings from the 2002 National Survey (NCJ 207845). These data are archived as POLICE-PUBLIC CONTACT SURVEY, 2002: [UNITED STATES] (ICPSR 4273).
4. 2005. Described in the BJS publication Contacts between Police and the Public, 2005 (NCJ 215243). These data are archived as POLICE-PUBLIC CONTACT SURVEY, 2005: [UNITED STATES] (ICPSR 020020).
5. 2008. Described in the BJS publication Contacts between Police and the Public, 2008 (NCJ 234599). These data are archived as POLICE-PUBLIC CONTACT SURVEY, 2008 (ICPSR 32022).
6. 2011. Split sample design due to instrument changes. New instrument findings described in two publications: Police Behavior During Traffic and Street Stops, 2011 (NCJ 242937) and Requests for Police Assistance, 2011 (NCJ 242938). These data are archived as POLICE-PUBLIC CONTACT SURVEY, 2011 (ICPSR 34276).
7. 2015. Described in the BJS publication Contacts between Police and Public, 2015 (NCJ 251145). These data are archived as POLICE-PUBLIC CONTACT SURVEY, 2015 (ICPSR 36653).
Police-Public Contact Survey, 2008 (ICPSR 32022)
The Police-Public Contact Survey (PPCS) provides detailed information on the nature and characteristics of face-to-face contacts between police and the public, including the reason for and outcome of the contact. The PPCS interviews a nationally representative sample of United States residents aged 16 years or older as a supplement to the National Crime Victimization Survey. To date, the PPCS has been conducted five times by the Bureau of Justice Statistics (BJS):
- The first survey -- described in the BJS publication Police Use of Force: Collection of National Data (NCJ 165040) -- documented levels of contacts with police during 1996.
- The second survey -- described in Contacts between Police and the Public: Findings from the 1999 National Survey (NCJ 184957) -- recorded police-citizen contacts in 1999. These data are archived as POLICE-PUBLIC CONTACT SURVEY, 1999: [UNITED STATES] (ICPSR 3151).
- The third survey -- described in Contacts between Police and the Public: Findings from the 2002 National Survey (NCJ 207845) -- covered interactions between police and the public in 2002. These data are archived as POLICE-PUBLIC CONTACT SURVEY, 2002: [UNITED STATES] (ICPSR 4273).
- The fourth survey -- described in the BJS publication, Contacts between Police and the Public, 2005 (NCJ 215243) -- covered interactions between police and the public in 2005. These data are archived as POLICE-PUBLIC CONTACT SURVEY, 2005: [UNITED STATES] (ICPSR 20020).
- The fifth survey -- described in the BJS publication, Contacts between Police and the Public, 2008 (NCJ 234599) -- covered interactions between police and the public in 2008. These data are archived as POLICE-PUBLIC CONTACT SURVEY, 2008 (ICPSR 32022).
Police-Public Contact Survey, 2011 (ICPSR 34276)
The Police-Public Contact Survey (PPCS) provides detailed information on the nature and characteristics of face-to-face contacts between police and the public, including the reason for and outcome of the contact. The PPCS interviews a nationally representative sample of U.S. residents age 16 or older as a supplement to the National Crime Victimization Survey. To date, the PPCS has been conducted six times by BJS:
The first survey - described in the BJS publication Police Use of Force: Collection of National Data (NCJ 165040) - documented levels of contacts with police during 1996.
The second survey - described in Contacts between Police and the Public: Findings from the 1999 National Survey (NCJ 184957) - recorded police-citizen contacts in 1999. These data are archived as POLICE-PUBLIC CONTACT SURVEY, 1999: [UNITED STATES] (ICPSR 3151).
The third survey - described in Contacts between Police and the Public: Findings from the 2002 National Survey (NCJ 207845) - covered interactions between police and the public in 2002. These data are archived as POLICE-PUBLIC CONTACT SURVEY, 2002: [UNITED STATES] (ICPSR 4273).
The fourth survey - described in the BJS publication Contacts between Police and the Public, 2005 (NCJ 215243) - covered interactions between police and the public in 2005. These data are archived as POLICE-PUBLIC CONTACT SURVEY, 2005: [UNITED STATES] (ICPSR 020020).
The fifth survey - described in the BJS publication Contacts between Police and the Public, 2008 (NCJ 234599) - covered interactions between police and the public in 2008. These data are archived as POLICE-PUBLIC CONTACT SURVEY, 2008 (ICPSR 32022).
The sixth survey (split sample design due to instrument changes) - new instrument findings described in two publications: Police Behavior During Traffic and Street Stops, 2011 (NCJ 242937) and Requests for Police Assistance, 2011 (NCJ 242938) - covered interactions between police and publice and public perceptions of police in 2011. These data are archived as POLICE-PUBLIC CONTACT SURVEY, 2011 (ICPSR 34276).
Police-Public Contact Survey, 2005 [United States] (ICPSR 20020)
Police-Public Contact Survey, 2002 [United States] (ICPSR 4273)
Police-Public Contact Survey, 1999: [United States] (ICPSR 3151)
The Effect of Prior Police Contact on Victimization Reporting: Results From the Police-Public Contact and National Crime Victimization Surveys, United States, 2002-2011 (ICPSR 36370)
This study examines whether or not prior experiences with the police, both directly and indirectly through the experiences of others, can influence one's decision to report a crime. Data from the National Crime Victimization Survey (NCVS) was linked with the Police-Public Contact Survey (PPCS) to construct a dataset of the police-related experiences of crime victims and non-victims. Variables include information on the prevalence, frequency, and the nature of respondents' encounters with the police in the prior year, as well as respondents' personal and household victimization experiences that occurred after the administration of the PPCS, including whether the crime was reported to the police. Demographic variables include age, race, gender, education, and socioeconomic status.
The ICPSR's holdings for both the NCVS and the PPCS are available in the NCVS series.
Police Use of Force Data, 1996: [United States] (ICPSR 6999)
Assessing Police Performance in Citizen Encounters, Schenectady and Syracuse, NY, 2011-2014 (ICPSR 35467)
These data are part of NACJD's Fast Track Release and are distributed as they were received from the data depositor. The files have been zipped by NACJD for release, but not checked or processed except for the removal of direct identifiers. Users should refer to the accompanying readme file for a brief description of the files available with this collection and consult the investigator(s) if further information is needed.
This study examined how police managers would use information about their officers' performance in procedural justice terms. The project provided for the injection of citizen assessment of service quality into systems of police performance measurement and accountability. Information on the quality of police-citizen encounters was drawn from surveys of citizens who had contact with the police in each of two cities, Schenectady and Syracuse, New York. Following the accumulation of survey data to form a baseline, survey results on citizens' satisfaction and judgments about procedural justice in their police contacts were summarized and reported to command staffs on a monthly basis through the departments' respective Compstat meetings. In this way the project provided for measures of police performance with respect to procedural justice with sufficient periodicity that the information was potentially useful in managing performance.
The study addressed four specific questions:
- Does performance on these outcomes - procedural justice and citizen satisfaction - improve when information on these outcomes is incorporated into departments' systems of performance measurement and accountability?
- What do police managers do with this information, and how (if at all) are field supervisors and patrol officers affected by it?
- Are survey-based measures of citizens' subjective experiences valid measures of police performance, that is, do they reflect the procedural justice with which police act?
- Can survey based measures be deployed economically (e.g., through targeted sampling), and can other, less expensive measures of the quality of police-citizen encounters be substituted for survey-based measures?
To answer these questions, researches used a mixed methods data collection plan. In both Schenectady and Syracuse, a survey was administered to people who had recent contact with the police. Semi-monthly samples were randomly drawn from police records of calls for service, stops, and arrests from mid-July, 2011, through mid-January, 2013. Across the 18 months of surveying, 3,603 interviews were completed. Also carried out, was a survey of key informants in each city - neighborhood association leaders - in order to extend the assessment of public perceptions of the local police beyond those who have direct contact with police to the larger community. Interviews with patrol officers and supervisors were also conducted in both sites, once at about the mid-point of the 18-month police services survey and again at the conclusion of the surveying. Interviews were conducted with the commanders shortly after the project was introduced to them in October of 2011. Finally, in Schenectady, "armchair" observation of a subset of the 1,800 encounters about which the citizen had already been interviewed was conducted.
The collection contains 7 SPSS data files and 6 Syntax files:
- archive_Census_beat.sav (n=30; 28 variables)
- archive_keyinformant_analysis.sps
- archive_keyinformant_survey.sav (n=90; 28 variables)
- archive_obs_byenc.sav (n=476; 79 variables)
- archive_obs_byobserver.sav (n=1,078; 476 variables)
- archive_obs_enc_analysis.sps
- archive_obs_enc_var_construction.sps
- archive_police_data.sav (n=3,603; 9 variables)
- archive_policeservices_survey_analysis.sps
- archive_policeservices_survey_closed.sav (n=3,603; 148 variables)
- archive_policeservices_survey_open.sav (n=1,218; 23 variables)
- archive_policeservices_survey_var_construction.sps
- Syntax to replicate results - list by table.pdf
For confidentiality reasons, the qualitative interviews with citizens, police sergeants, patrol officers, and commanders regarding their experiences are not available as part of this collection.
British Crime Survey, 1982 (ICPSR 8672)
National Police Research Platform, Phase I [United States], 2009-2011 (ICPSR 34518)
These data are part of NACJD's Fast Track Release and are distributed as they there received from the data depositor. The files have been zipped by NACJD for release, but not checked or processed except of the removal of direct identifiers. Users should refer to the accompany readme file for a brief description of the files available with this collections and consult the investigator(s) if further information is needed.
The National Police Research Platform was designed to a) strengthen the science of policing by generating timely, in-depth, longitudinal information about policing organizations, personnel and practices and, b) move policing in the direction of evidence-based "learning organizations" by providing translational feedback to police agencies and policy makers. Phase I focused on testing methods and measures in 29 agencies in order to build the Platform infrastructure. First, a "total department" online methodology was successfully implemented covering numerous dimensions of organizational behavior, from supervision and accountability to employee integrity and burnout. Second, a public satisfaction contact survey was implemented in several jurisdictions to provide local external indicators of the quality of police-citizen encounters and organizational legitimacy in the community. Third, two longitudinal studies were initiated - one of new police recruits and one of new first-line supervisors - to chart their career development and identify factors that influence life trajectories. Finally, a randomized control trial was introduced in once site to test the effects of procedural justice training as part of the Platform's measurement system.
Evaluation of Grants to Encourage Arrest Policies for Domestic Violence Cases in the State College, Pennsylvania, Police Department, 1999-2000 (ICPSR 3166)
Evaluation of the Impact of Innovative Policing Programs on Social Disorder in Seven Cities in the United States, 1983-1990 (ICPSR 6215)
Increasing the Efficiency of Police Departments in Allegany County, New York, 1994-1995 (ICPSR 2558)
National Firearms Survey, 1999 (ICPSR 4552)
Educating the Public About Police Through Public Service Announcements in Lima, Ohio, 1995-1997 (ICPSR 2885)
Drugs and Police Response: Survey of Public Housing Residents in Denver, Colorado, 1989-1990 (ICPSR 6482)
Public Attitudes Toward the Criminal Justice System and Criminal Victimization in North Carolina, 1971 (ICPSR 7670)
Evaluation of the Weed and Seed Initiative in the United States, 1994 (ICPSR 6789)
Crime Victimization and Police Treatment of Undocumented Migrant Workers in Palisades Park, NJ, 2011-2012 (ICPSR 35087)
These data are part of NACJD's Fast Track Release and are distributed as they were received from the data depositor. The files have been zipped by NACJD for release, but not checked or processed except for the removal of direct identifiers. Users should refer to the accompanying readme file for a brief description of the files available with this collection and consult the investigator(s) if further information is needed.
This exploratory study used the case of Palisades Park, New Jersey, to examine five problem areas: the political economy of migrant labor, prevalence and patterns of criminal victimization against undocumented migrant workers (UMWs), prevalence and patterns of violence against women among UMWs, police-migrant interactions, and criminal offending of UMWs. Data collection efforts were concentrated on the recruitment and survey of 160 male day laborers and 120 female migrant workers in face-to-face interviews. Additional data from focus group and key informant interviews were gathered to provide in-depth information on specific concerns and issues.
Effectiveness of Alternative Victim Assistance Service Delivery Models in the San Diego Region, 1993-1994 (ICPSR 2789)
Factors Related to Domestic Violence Court Dispositions in a Large Midwestern Urban Area, 1997-1998: [United States] (ICPSR 3010)
Developing Uniform Performance Measures for Policing in the United States: A Pilot Project in Four Agencies, 2008-2009 (ICPSR 29742)
National Survey of Police-Media Relations, 2000 (ICPSR 3597)
Impact Assessment of Sex Offender Notification on Wisconsin Communities, 1998 (ICPSR 3015)
Testing and Evaluating Body Worn Video Technology in the Los Angeles Police Department, California, 2012-2018 (ICPSR 37467)
This research sought to evaluate the implementation of body worn cameras (BWCs) in the Los Angeles Police Department (LAPD). Researchers employed three strategies to evaluate the impact of BWCs in the department: 1) two-wave officer surveys about BWCs, 2) two-wave Systematic Social Observations (SSOs) of citizen interactions from officer ride-alongs, and 3) a time series analysis of existing LAPD data of use of force and complaint data.
The officer surveys were conducted in the Mission and Newton divisions of the LAPD before and after BWCs were implemented. The survey instrument was designed to measure perceptions of BWCs across a variety of domains and took approximately 20 minutes to complete. Researchers attended roll calls for all shifts and units to request officer participation and administered the surveys on tablets using the Qualtrics software. The pre-deployment survey was administered in both divisions August and September 2015. The post-deployment surveys were conducted with a subset of officers who participated in the pre-deployment surveys during a two-week period in the summer of 2016, approximately nine months following the initial rollout of BWCs.
The SSO data was collected in the Mission and Newton divisions prior to and following BWC implementation. The pre-administration SSOs were conducted in August and September 2015 and the post-administration SSOs were conducted in June and August, 2016. Trained observers spent 725 hours riding with and collecting observational data on the encounters between officers and citizens using tablets to perform field coding using Qualtrics software. A total of 124 rides (71 from Wave I and 53 from Wave II) were completed between both Newton and Mission Divisions. These observations included 514 encounters and involved coding the interactions of 1,022 citizens, 555 of which were deemed to be citizens who had full contact, which was defined as a minute or more of face-time or at least three verbal exchanges.
Patrol officers (including special units) for ride-alongs were selected from a master list of officers scheduled to work each day and shift throughout the observation period. Up to five officers within each shift were randomly identified as potential participants for observation from this master list and observers would select the first available officer from this list. For each six-hour observation period, or approximately one-half of a shift, the research staff observed the interactions between the assigned officer, his or her partner, and any citizens he or she encountered. In Wave 2, SSOs were conducted with the same officers from Wave 1.
The time series data were obtained from the LAPD use of force and complaint databases for each of the 21 separate patrol divisions, a metropolitan patrol division, and four traffic divisions of the LAPD. These data cover the time period where BWC were implemented throughout the LAPD on a staggered basis by division from 2015 to 2018. The LAPD operates using four-week deployment periods (DPs), and there are approximately 13 deployment periods per year. These data span the period of the beginning of 2012 through the 2017 DP 12. These data were aggregated to counts by deployment period based on the date of the originating incident. The LAPD collects detailed information about each application of force by an officer within an encounter. For this reason, separate use of force counts are based on incidents, officers, and use of force applications. Similarly, the LAPD also collects information on each allegation for each officer within a complaint and public complaint counts are based on incidents, officers, and allegations.
Assessing the Validity and Reliability of National Data on Citizen Complaints about Police Use of Force, 2003 and 2007 (ICPSR 36042)
These data are part of the NACJD's Fast Track Release and are distributed as they were received from the data depositor. The files have been zipped by NACJD for release, but not checked or processed excepted as noted below. All direct identifiers have been removed and replaced with text enclosed in square brackets (e.g.[MASKED]). Due to the masking of select information, variables/content described in the data documentation may not actually be available as part of the collection. Users should consult the investigator(s) if further information is needed.
This collection is one part of the Department of Justice's response to 42 USC 14142, a law which requires the U.S. Attorney General to 1) "acquire data about the use of excessive force by law enforcement officers" and 2) "publish an annual summary of the data." Researchers compared agency-level data reported in the 2003 (ICPSR 4411) and 2007 (ICPSR 31161) waves of the Law Enforcement Management and Administrative Statistics (LEMAS) surveys with available external sources including publicly available reports and direct contact with agency personnel. The purpose of this study was to assess validity and reliability of the available agency-level reported data on citizen complaints about police use of force.
Research on the Impact of Technology on Policing Strategy, 2012-2014 [United States] (ICPSR 36367)
These data are part of NACJD's Fast Track Release and are distributed as they were received from the data depositor. The files have been zipped by NACJD for release, but not checked or processed except for the removal of direct identifiers. Users should refer to the accompanying readme file for a brief description of the files available with this collection and consult the investigator(s) if further information is needed.
The purpose of this study was to develop a research-based framework to guide police agencies in future selection, implementation, and use of technology. This project was conducted in three phases. First, an expert panel was convened to identify key policing technology and to ensure that the survey captured critical indicators of technology performance. Second, a nationally representative survey was administered to over 1,200 state and local law enforcement agencies. The survey explored policing strategies and activities as well as technology acquisition, use, and challenges.
Assessing Trends and Best Practices of Motor Vehicle Theft Prevention Programs in the United States, 2003 (ICPSR 4278)
Study of Race, Crime, and Social Policy in Oakland, California, 1976-1982 (ICPSR 9961)
Census of Law Enforcement Gang Units, 2007 (ICPSR 29503)
Understanding the Use of Force By and Against the Police in Six Jurisdictions in the United States, 1996-1997 (ICPSR 3172)
Collective Efficacy and Social Cohesion in Miami-Dade County, Florida, 2010-2011 (ICPSR 34656)
These data are part of NACJD's Fast Track Release and are distributed as they there received from the data depositor. The files have been zipped by NACJD for release, but not checked or processed except of the removal of direct identifiers. Users should refer to the accompany readme file for a brief description of the files available with this collections and consult the investigator(s) if further information is needed.
The current study sought to expand the current understanding of the psychometric characteristics of the collective efficacy scale at the individual level and the role of collective efficacy in promoting safe, healthy community conditions. A team of interviewers consisting of residents of the targeted neighborhoods were selected and trained to administer the field surveys (NIJ Neighborhoods Resident Survey Data, 108 variables, n=649). In order to ensure accuracy of the responses, the field supervisor conducted telephone validation for approximately ten to fifteen percent of the surveys. In addition to resident surveys, trained research staff conducted systematic social observations (SSOs) of street segments in selected neighborhoods noting physical and social indictors.
Reducing Violence in Communities: An In-Depth Study of Efforts in Durham, NC and Minneapolis, MN, 2010-2022 (ICPSR 38691)
Recognizing that violence can be an intractable problem in many communities and that there are numerous approaches to both an immediate violence problem and the range of root causes behind violence, the National Institute of Justice funded an investigation into what factors underlie violence and efforts being implemented to address those factors and potentially reduce violence at the community level. In this mixed methods study, the RAND Corporation drew on data from key informant interviews, community surveys, administrative data, and geographic data to examine specific factors that contribute to violence, as well as a range of anti-violence efforts that have been used to address violence levels in two U.S. communities: the Bullseye area of Durham, North Carolina, and the Northside (North Minneapolis) neighborhood of Minneapolis, Minnesota. Specifically, the research project aimed to answer the following questions:
- What are community level factors that can contribute to persistent violence?
- What are the key factors in both cities that distinguish high violent crime areas compared to low violent crime areas?
This collection contains final analytic datasets for Durham (DS1) and Minneapolis (DS2), violent crime rate data (DS3), community survey data for Durham (DS4) and Minneapolis (DS5), and multiple datasets containing community-level contextual factors from the American Community Survey (ACS) and geographical data from the U.S. Census Bureau (2009-2018) that were used to build the final analytic datasets (DS6-DS11). Qualitative data from key informant interviews and GIS data are not available for download at this time. Access to Durham and Minneapolis community survey data is restricted.
Homeland Security in Small Law Enforcement Jurisdictions: Preparedness, Efficacy, and Proximity to Big-City Peers, 2011 (ICPSR 33941)
The Homeland Security in Small Law Enforcement Jurisdictions study drew upon data collected from 350 small (1-25 full time sworn officers) law enforcement agencies nationwide to address four gaps in the homeland security research literature and clarify/expand upon an empirically-derived model of homeland security preparedness and organizational efficacy.
- Whether physical and relational proximity to large agency peers facilitates the development of homeland security preparedness and improves perceptions of organizational efficacy (the capacity of an organization to respond) in small agencies and, conversely, whether the geographic isolation of small, rural agencies inhibits homeland security efforts.
- Whether efficacy of efforts to enhance homeland security is not just a function of perceived/actual risk or funding, but also other "institutional pressures", such as books and journal publications, as well as conferences, training, and other professional networks and channels.
- Assessments of preparedness outcomes through "organizational efficacy", the perception about the organization's ability to accomplish its goals.
- The lack of theoretical context, such as contingency and institutional theory frameworks, used to examine data on preparedness and organizational efficacy.
Systematic Review of the Effects of Second Responder Programs, 1992-2007 (ICPSR 31641)
Community Crime Prevention and Intimate Violence in Chicago, 1995-1998 (ICPSR 3437)
Evaluation of the Gang Resistance Education and Training (GREAT) Program in the United States, 1995-1999 (ICPSR 3337)
Law Enforcement and Sex Offender Registration and Notification: Perspectives, Uses, and Experiences, 2014-2015 [United States] (ICPSR 36534)
These data are part of NACJD's Fast Track Release and are distributed as they were received from the data depositor. The files have been zipped by NACJD for release, but not checked or processed except for the removal of direct identifiers. Users should refer to the accompanying readme file for a brief description of the files available with this collection and consult the investigator(s) if further information is needed.
This study represents the first comprehensive national assessment of law enforcement uses of and perspectives on sex offender registration and notification (SORN) systems. The two-year, mixed-method study featured collection and analysis of interview data from over two-dozen jurisdictions, and administration of a nationwide survey of law enforcement professionals. The study examined ways in which law enforcement leaders, uniformed staff, and civilian staff engaged in SORN-related duties perceive SORN's roles and functions, general effectiveness, and informational utility. Additionally, the study elicited law enforcement perspectives related to promising SORN and related sex offender management practices, perceived barriers and challenges to effectiveness, and policy reform priorities.
This collection includes two SPSS data files and one SPSS syntax file: "LE Qualitative Data.sav" with 55 variables and 101 cases, "LE Quantitative Data-ICPSR.sav" with 201 variables and 1402 cases and "LE Quantitative Data Syntax.sps".
Qualitative data from interviews conducted with law enorcement professionals are not available at this time.
Breaking the School-to-Prison Pipeline: Implications of Removing Police from Schools for Racial and Ethnic Disparities in the Justice System, United States, 2003-2018 (ICPSR 39189)
Momentum toward removing school-based law enforcement (SBLE) has increased since the summer of 2020. This change has occurred due to issues of equity with the hope that removing SBLE will reduce existing racial and ethnic disparities in the criminal justice system. SBLE refers to sworn law enforcement stationed in schools on either a part- or full-time basis. Some SBLE are known as school resource officers, who often receive special training in juvenile law and interacting with students in schools, although this varies from state to state. Other SBLE do not receive any special training in working with young people.
Although the move toward removing SBLE may have intuitive appeal to some school districts, no empirical evidence exists regarding what happens to students' frequency of contact with the criminal justice system after schools remove SBLE. Similarly, current research has not examined the impacts on the attendant racial and ethnic disparities.
All the data used in this study are secondary data from the National Center for Education Statistics (NCES), including both the publicly available Civil Rights Data Collection (CRDC) and the restricted-use School Survey on Crime and Safety (SSOCS). All data cleaning, manipulation, and analysis will be done using syntax files in Stata. This study is a collection of these three Stata .do syntax files.
This study compared changes in three measures of criminal justice contact (i.e., arrests, referrals to law enforcement, and crimes reported to police) in schools that removed SBLE relative to the changes in schools that did not remove SBLE. The study examined within-school racial and ethnic differences in rates of arrest and referrals to law enforcement, and between-school differences in all three measures of criminal justice system contact by school racial composition.
Informal Social Control of Crime in High Drug Use Neighborhoods in Louisville and Lexington, Kentucky, 2000 (ICPSR 3412)
Evaluation of the Target Corporation's Safe City Initiative in Chula Vista, California, and Cincinnati, Ohio, 2004-2008 (ICPSR 28044)
Fatal and Non-Fatal Intimate Partner and Family Violence Against Older Women: An Exploration of Age and Police Response to Inform Research, Policy, and Practice, United States, 2011-2019 (ICPSR 39463)
This research project examined police response to fatal and non-fatal intimate partner violence (IPV) and family violence (FV) against older women from existing data sources, including the Uniform Crime Reporting Program's National Incident-Based Reporting System (NIBRS) and the National Crime Victimization Survey (NCVS), and the Centers for Disease Control and Prevention's (CDC) National Violent Death Reporting System (NVDRS). The goals of this project were to explore how existing data sources could inform a better understanding of IPV and FV against older women.
This collection includes variables derived from the publicly available NCVS (Dataset 1) and NIBRS (Datasets 2 and 3) data. The NVDRS data is only available with restricted access through the CDC and is not available with ICPSR.
A Process and Outcome Evaluation of the use of NIBIN and its Effects on Criminal Investigations in the United States, 2006-2012 (ICPSR 34970)
These data are part of NACJD's Fast Track Release and are distributed as they were received from the data depositor. The files have been zipped by NACJD for release, but not checked or processed except for the removal of direct identifiers. Users should refer to the accompanying readme file for a brief description of the files available with this collection and consult the investigator(s) if further information is needed.
This project had four goals/areas of examination.
- Examine the current state of the National Integrated Ballistic Information Network (NIBIN) implementation nationally and at partner sites.
- Examine the impediments and facilitators of successful implementation of NIBIN.
- Understand the extent to which NIBIN helps identify suspects and increase arrests for firearms crimes.
- Understand best practices for the implementation of NIBIN at agencies and for criminal investigations.