“…In this paper, we use the U.S. municipal bond market as a laboratory to evaluate the implications of tax-induced ownership patterns for asset returns. Unlike in much previous work (see, for example, Green (1993), Trzcinka (1982), Green, Holli…eld, and Schurho¤ (2007), and Ang, Bhansali, and Xing (2010)), our focus is not on the federal income tax exemption but rather on the state income tax privilege, whereby income from in-state municipal bonds are tax exempt for state residents. This privilege policy, which amounts to states essentially paying local investors to under-diversify, varies signi…cantly across states, resulting in di¤erent levels of in-state ownership of municipal bonds.…”