Analyze Data

• Funding for Secondary Data Analysis
• Online Analysis Using the Data Analysis System (DAS)
  • Introduction to Online Analysis
  • Features of Online Data Analysis System
  • NACJD Collections Available for Use with Data Analysis System
  • Other Online Data Analysis Files
• Variable-Level Searching
• Quick Tables

Funding for Secondary Data Analysis

Funding opportunities for secondary analysis of NACJD data are available through both of our federal sponsors.

• Information about funding from the Bureau of Justice Statistics and the American Statistical Association can be found on the BJS Web site at http://www.ojp.usdoj.gov/bjs/funding.htm.

• Information about funding from the National Institute of Justice Data Resources Program can be found in the NIJ solicitation at http://www.ojp.usdoj.gov/nij/funding.htm.

Online Analysis Using the Data Analysis System (DAS)

• Introduction to Online Analysis

• Features of Online Data Analysis System

• Criminal Justice Collections Available for Online Analysis

• Other Data Collections Available for Online Analysis

Introduction to Online Analysis

A selection of NACJD data collections is available for online data analysis. This means that users can perform the following tasks without having to download the entire collection and importing it into a statistical package:

• Search for variables of interest in a dataset

• Review frequencies or summary statistics of key variables to determine what further analyses are appropriate

• Review frequencies or summary statistics for missing data

• Produce simple summary statistics for reports

• Create statistical tables from raw data

• Create a subset of cases or variables from a particularly large collection to save downloading time and space on a personal computer

Features of Online Data Analysis System

This online data analysis system uses the Survey Documentation and Analysis (SDA) program developed and maintained by the Computer-assisted Survey Methods Program at the University of California, Berkeley. The online documentation for this system is available at http://sda.berkeley.edu:7502/document.htm.

The following features of the online data analysis system are currently available:

• Browse the codebook for a dataset

• Perform certain statistical procedures, such as:

  • List values of individual cases

  • Frequencies

  • Crosstabulations

  • Comparisons of means

  • Correlation matrix

  • Ordinary Least Squares (OLS) regression

• Manipulate variables

• Recode variables

• Compute new variables

• List newly created variables

• Create custom subsets of selected variables and cases

• Download the entire collection or a customized subset, including:

  • ASCII data file

  • SAS, SPSS, or Stata data definition statements

  • Codebook, questionnaire, or other documentation

NACJD Collections Available for Use with Data Analysis System

The following NACJD data collections are available for use with the online data analysis system. The datasets have been topically organized to faciliate ease of use.

• View All Online Data Analysis System Studies

• Corrections Data

• Courts Data

• Crime and Delinquency Data

• Criminal Justice System Data

• Hate Crime Data

• Homicide Data

• International Crime Data

• National Incident Based Reporting System (NIBRS) Data

• Police Data

• Uniform Crime Reports County-Level Data

• Victimization Data

• Violence Against Women Data

Variable-Level Searching

This feature searches the question text and variable and value labels for variables across all NACJD or ICPSR studies that are available for online analysis.

Here are some general guideline for using the variable-level search below:

• Searches are not case-sensitive.
• Quotation marks are interpreted literally - don't use them.
• Only whole words are matched - no wildcards or partial words.
• Try different forms of the search term or use synonyms (e.g., employ, employment, job, work).
• Be patient. This program searches thousands of variables and, therefore, it is sometimes slow.
• For more detailed information, see How to Search for Specific Variables

Search NACJD Studies on DAS    Search all ICPSR Studies on DAS

Quick Tables

A new addition to the online analysis component of NACJD is now available for select studies. The new feature is called Quick Tables and it allows users to produce analytic tables by choosing from among pre-selected high-interest variables presented in drop-down menus. Quick Tables is now available for the following data collections.

• Role of Stalking in Domestic Violence Crime Reports Generated by the Colorado Springs Police Department, 1998 (ICPSR 3142)

• Survey of Prosecutors' Views on Children and Domestic Violence in the United States, 1999 (ICPSR 3103)