megavideolinks
Joined: 19 Nov 2011
Posts: 273
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 Posted: Sun Nov 20, 2011 2:28 pm Post subject: Variables Used in the Analysis |
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Computer use. Computer users are identified by three CPS questions that ask if the
subject uses computers at home, at school, or at his or her main job. “Computer” is not defined
for the respondent. Use of computers at any other location, such as community centers, public
libraries, or friends’ homes, is not ascertained. Due to this limitation, CPS estimates may
slightly understate the total number of people who use computers at any location. Data on the
intensity or frequency of use are not available from CPS, so individuals are classified
dichotomously as users or non-users.
Internet use. Internet users are identified using a variable on the October 2003 CPS file,
PRNET1, that the Census Bureau derived from several CPS questions that ask if the subject
connects to the Internet or uses e-mail at home or at work, uses the Internet at school, or uses the
Internet at any location. In the September 2001 CPS, the variable PRNET1 was derived slightly
differently; questions about using e-mail at home and about using the Internet at any location
were not included. As a result, a small number of people who should have been counted as
Internet users were not counted by PRNET1 on the September 2001 file. Previous publications
presenting September 2001 data (e.g., DeBell and Chapman 2003) used the Internet-use variable
originally furnished by the Census Bureau. This report’s estimates of Internet use in 2001 (table
B-4) are corrected and are calculated in the same way as 2003 estimates. As a result, 2001
estimates of Internet use in this report may differ slightly from previously published estimates.
For example, while the percentage of children and adolescents age 5–17 who used the Internet in
2001 was previously estimated to be 59 percent (DeBell and Chapman 2003), this report puts the
figure at 60 percent (table B-4). Data on the intensity or frequency of use are not available from
CPS, so individuals are classified dichotomously as users or non-users.
Race/ethnicity. The race/ethnicity variable is derived from two CPS questions that ask the
subject’s race (classified as White, Black, American Indian/Aleut/Eskimo, Asian or Pacific
Islander, or any combination of the previous categories) and whether or not he or she is Hispanic.
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