Really Cool
    Minority Data

National Neighborhood Crime Study, Wave 2 (NNCS2), [United States], 1999-2013 (ICPSR 38483)

Version Date: Oct 10, 2022 View help for published

Principal Investigator(s): View help for Principal Investigator(s)
Lauren J. Krivo, Rutgers University; Christopher J. Lyons, University of New Mexico; Maria B. Velez, University of Maryland


Version V1 ()

  • V2 [2023-01-25]
  • V1 [2022-10-10] unpublished

You are currently viewing an older version of this data collection. A more recent version may be available by selecting ()

Slide tabs to view more

The primary purpose of the second wave of the National Neighborhood Crime Study (NNCS2) was to develop a panel dataset of serious reported crimes in urban neighborhoods circa two time points - 2000 and 2010. These data offer the opportunity to assess the sources and consequences of neighborhood crime change for "communities" of different ethno-racial and economic compositions across the United States. The study also sought to examine the role of a neighborhood's broader ecology on crime levels and crime change by integrating indicators of city and/or metropolitan conditions. The NNCS2 includes two datasets. The first dataset, the NNCS2-Panel file (NNCS2-P), contains information on the Federal Bureau of Investigation's (FBI) Part 1 Index crimes (except arson), socioeconomic and demographic characteristics, and a variety of other neighborhood and city level controls for circa 2000 and 2010 for tracts in 81 of the 91 cities in the NNCS, wave 1. The second dataset, the NNCS2-Cross-Sectional file (NNCS2-CS), allows for examination of the local and contextual sources of neighborhood crime inequality circa 2010. The NNCS2-CS incorporates parallel data for census tracts and cities as in the Panel file, but includes a few additional cities for which panel data could not be compiled, as well information on the metropolitan areas within which cities are located.

Krivo, Lauren J., Lyons, Christopher J., and Velez, Maria B. National Neighborhood Crime Study, Wave 2 (NNCS2), [United States], 1999-2013. Inter-university Consortium for Political and Social Research [distributor], 2022-10-10.

Export Citation:

  • RIS (generic format for RefWorks, EndNote, etc.)
  • EndNote
National Science Foundation (SES-1357207), National Science Foundation (SES-1356252)

Census tract

Inter-university Consortium for Political and Social Research

1999-01-01 -- 2013-12-31, 2010-01-01 -- 2013-12-31
2014-01-01 -- 2018-12-31
  1. All details of data collected are included in the codebooks for the data files.


The NNCS wave 1 sample was a stratified (within U.S. census regions) random sample of cities with populations of at least 100,000 in 1999. When the police department in a randomly selected sampled city declined to participate, the city was replaced with an alternative city of similar population size, ethno-racial composition, and poverty rate. For wave 2, all cities in the final wave 1 sample plus Newark, NJ were contacted.

Census tracts that are wholly or partly inside the boundaries of U.S. cities (census places) with populations of at least 100,000 in 1999.

Census tracts that are wholly or partly within the boundaries of the cities

For Wave 2 of the NNCS, researchers contacted the police departments in all 91 cities in the NNCS wave 1 sample. Researchers obtained valid geographically-identified crime data for 84 of these cities, making the city response rate 93.4%. The NNCS2 Panel file excludes all census tracts in three of the 84 cities because the crime data could not be normalized to consistent census tract boundaries across the two waves. The NNCS2 Cross-Sectional file added census tracts in Newark, NJ (city N=85).