In addition to using IRS data, Fligstein, Hastings, and Goldstein (2017) also use data from Zillow Real Estate as well as from the Panel Study of Income Dynamics (PSID). Which term best represents these data?
a. U.S. Census Bureau
b. Integrated Public Use Microdata Series
c. Independent Investigator Source
d. U.S. Government Source
e. Inter-University Consortium for Political and Social Research
