L.A.FANS has created four versions of Restricted Data, which are increasing in the number or variables and their detail.
L.A.FANS Restricted Data Version 1
L.A.FANS Restricted Data Version 1 is the lowest level of restricted data. It includes all individual characteristics reported in the household interviews. It also includes variables describing distance between geographic locations (e.g., home and work) and a pseudo tract identification number that links households in the same tract (a randomly-assigned number from 1 to 65 that is not related to the actual census tract number). Users are thus able to estimate multilevel statistical models but cannot link additional community-level data.
L.A.FANS Restricted Data Version 2
L.A.FANS Restricted Data Version 2 is the middle level of restricted data that adds actual census tract number and the ability to link neighborhood characteristics to individual and household data in L.A.FANS. It includes the 1990 census tract numbers which provide an easy link to the data from the decennial censuses and other sources.
L.A.FANS Restricted Data Version 2.5
L.A.FANS Restricted Data Version 2.5 is the mid-high level of restricted data that adds census block number to the individual records, which allows researchers to link neighborhood characteristics at a finer geographic level than census tract. This version also includes the name and identifying code for the schools attended by each child in the sample.
L.A.FANS Restricted Data Version 3
L.A.FANS Restricted Data Version 3 is the highest level of restricted data that adds geographic coordinates to individual records. It includes the geographic coordinates (latitude and longitude) of addresses for several important locations from respondents' daily lives (e.g., location of home, work, place of worship). It also includes the day of birth for birthdates collected in the survey.
Accessing L.A.FANS Restricted Data
L.A.FANS data are distributed by the Data Sharing for Demographic Research (DSDR) Project at the University of Michigan. For information about using the Restricted Data, visit https://www.icpsr.umich.edu/icpsrweb/DSDR/series/846.