MTF does not release detailed geography codes in its public use files because of the disclosure risk it would cause. The MTF sample is drawn to generate representative samples of the four Census Bureau regions of the country (Northeast, Midwest, South, and West), but it does not generate representative samples of smaller geographic areas such as states, counties, or cities. For additional information about data that is withheld from the public use files please contact MTF directly at firstname.lastname@example.org.
Variables omitted from the Western region
questionnaires are noted in each codebook.
Prior to 2005, the variable asking about race only
had categories for Black and White. In 2005, a change was made to
include a third category for Hispanic. This new format was implemented
on all six forms. This change has continued in 2009. Each form for
2009 allows for Black, White, and Hispanic on the race question.
To protect the privacy of respondents, all variables that could be
used to identify individuals have been collapsed or recoded in the
public use files. These modifications should not affect analytic uses
of the public use files.
Conducted by the University of Michigan, Institute for Social Research, Survey Research Center.
A user guide is
provided with the study documentation. It contains a year-to-year cross-time question index
for the MTF 12th-grade surveys, which is
sorted by subject area, item reference number, and questionnaire
Frequency and percentage distributions displayed in the 2009 codebooks are unweighted, rather than weighted by variable V5 as they had been in previous years. This change was made to simplify both the production of the codebooks and their interpretation
by the analyst.