Fligstein et al. (2017) were interested in understanding housing consumption changes over time. Rather than conducting a multi-year survey themselves, they utilize data from the Panel Study of Income Dynamics (PSID), a nationally representative longitudinal survey of U.S. households. What advantage of secondary data is most apparent in this choice?
a. inclusion of many more variables
b. saves time and money
c. the researcher avoids data collection problems
d. facilitates comparison with other samples
e. multiple studies to be combined
