8Harold M Groves& John Riew, 1961, Statistical History of the Property Tax Base in Wisconsin(1916- 1958), American Journal of Economics and Sociology.
9Gary M. Galles & Robert L. Sexton 1998, A TAle of Two TAx Jurisdictions: The Surprising Effects of California's Proposition13 And Massachusetts^1 Proposition 2 2/1 , American Journal of Economics and Sociology.