Documentation: Crime Data 2010
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Publisher: Interuniversity Consortium for Political and Social Research (ICPSR)
Survey: Crime Data 2010
Document: Uniform Crime Reporting Program Data: County-Level Detailed Arrest and Offense Data, 2010
citation:
Social Explorer, United States Department of Justice. Office of Justice Programs. Federal Bureau of Investigation. Uniform Crime Reporting Program Data: County-Level Detailed Arrest and Offense Data, 2010. ICPSR33523-v1.
Uniform Crime Reporting Program Data: County-Level Detailed Arrest and Offense Data, 2010
Identifying Missing Data
In this data collection, zeroes may represent both true zeroes or missing data, and it is possible to distinguish between the two. In the arrest files (Parts 1-3 and 5-7), the coverage indictor alone does not indicate whether or not zeroes are true or missing values. A county can have a coverage indicator of zero, but still contain arrest data. ICPSR can estimate arrest data for a county that did not report any arrests based on data for other counties of comparable population size in the same state that did report 12 months of data. In order to distinguish true zeroes from missing values, the user has to look at the coverage indicator for a county in conjunction with the arrest variables. If an arrest variable for a particular county has a value of zero and the coverage indicator is greater than zero, then the arrest variable contains a true zero. This true zero is not necessarily a reported zero as it may have been estimated. If an arrest variable for a particular county has a value of zero and the coverage indicator for that county is zero, then the user must check the values of ALL of the arrest variables. If some arrest variables contain zeroes and some contain other values, then the zeroes for this county are true. If ALL arrest variables and the coverage indicator for the county in question contain zeroes, then these indicate missing data.

In the crimes reported file (Part 4), data can not be estimated for non-reporting agencies. Therefore, counties with no population for reporting agencies will also have a coverage indicator of zero and all crime variables will have a value of zero. These zeroes indicate missing data. If a county has one or more offense variables with a value of zero, but has a value of greater than zero for the population and coverage indicator variables, then the zeroes for these particular offense variables should be considered true zeroes for the purposes of analysis.