The Pricing of Tax-Exempt Bonds and the Miller Hypothesis
用随机截距模型检验了米勒假说与机构需求假说，发现免税利率约为应税利率的52%，边际税率接近48%，支持米勒假说。
This paper reports a new test of two competing theories of the relation between tax-exempt and taxable interest rates. The Miller hypothesis predicts that the tax-exempt rate is 52 percent of the taxable rate, while the institutional demand hypothesis predicts a volatile relationship. The tests in this paper employ a random intercept model to control for the risk of average interest rates. The results favor the Miller hypothesis. Marginal tax rates are found to be close to Miller's predicted 48 percent. The relationship is not influenced by relative demand or supply and the marginal tax rate appears stable over time.