I restrict my extract of the NLSY data to respondents who had at least a bachelor's degree in 1988 (when they were 25 - 31 years of age) and responded to all survey waves (throughout the
analysis I
apply the appropriate panel weights for this
subgroup of initial respondents).
Specifically, the paper considers: why and how
subgroup findings are important for
applied research, the importance of prespecifying
subgroups before
analyses are conducted, and the importance of using existing theory and prior research to distinguish between
subgroups for which study findings are confirmatory, as opposed to exploratory.