Explaining the Yield Spread between Taxable and Tax-exempt Bonds: The Role of Expected Tax Policy

James M. Poterba, Studies in State and Local Public Finance (University of Chicago Press, 1986), chap. 2, https://www.nber.org/books-and-chapters/studies-state-and-local-public-finance/explaining-yield-spread-between-taxable-and-tax-exempt-bonds-role-expected-tax-policy.