I’m interested in the methodology they use to identify investor-owned homes. Are they comparing known resident addresses to the names on property tax records? How does it work when multiple members of the same family have different last names? It seems fairly common for members of different generations of family (including in-laws) to live in a house that one person owns. How are you distinguishing an investment from…
This might undercount (if owners don't file the form) or overcount (tax fraud or error), but there's financial incentives to get it right on both sides, so it's probably fairly accurate.