3.1.1 US housing policiesLet us start by describing the policies encouraging homeownership. Federal, stateand local governments in the United States subsidize household investment in owneroccupiedhousing. The portfolio of policies includes the non-taxation of imputed rents,favorable tax treatment of capital gains, local land-use restrictions, exemption of housingfrom means-tested social insurance programs, subsidized mortgage insurance, and thesponsorship of secondary mortgage-market enterprises (Jaffee and Quigley, 2007).The most significant housing subsidy programs in the U.S. are funded by taxexpenditures through the Internal Revenue Code. The special status of owner-occupiedhousing under the personal income tax is well-known: interest payments for homemortgages are deductible as personal expenses for the first and second homes oftaxpayers, up to a limit of one million dollars; ad valorem property taxes on owneroccupiedhouses are also deductible as personal expenses; the implicit rental income from7 I cannot present all the possible housing policies in the United States; there are just too many. For an overview ofthese policies, see Schwartz (2006). See also Olsen (2003) and Green and Malpezzi (2003) who provide expert reviewsof the current state of housing policy in the United States, as well as some of its history.occupying the house (the “dividend”) is excluded from gross income; and capital gainsare essentially untaxed.8Beyond these subsidies to home ownership, which apply to all owner–occupants,the U.S. tax code provides additional subsidies to specific groups of homeowners. Theseprograms are managed by the states, but the source of the subsidy is federal taxexpenditures. The tax code permits lower levels of government to issue tax-exempt debtand to use the proceeds for the benefit of specific mortgage holders through the MortgageRevenue Bond (MRB) program. Recipients benefit by obtaining mortgages which havebeen issued at the lower tax-exempt interest rate, rather than the market rate.Let us now describe the policies directly targeting low-income households. Taxdeductions of housing expenses are an important proportion of fiscal expenses in manycountries. These deductions are often based on equity reasons as it is considered that theyare useful to help many households to afford a house to live in. For example, in itspreamble to the 1949 Housing Act, Congress declared its goal of “a decent home in asuitable living environment for every American family.” In the more than 50 years sincethis legislation was passed, the federal government has helped fund the construction andrehabilitation of more than 5 million housing units for low-income households andprovided rental vouchers to nearly 2 million additional families (Schwartz, 2006). Yet,the nation’s housing problems remain acute. In 2003, 46 million households lived inphysically deficient housing, spent 30 percent or more of their income on housing, orwere homeless (National Low Income Housing Coalition, 2005)Excluding tax expenditures, the federal government provides subsidies for lowincomehouseholds in three basic ways: (i) supporting the construction and operation ofspecific housing developments; (ii) helping renters pay for privately owned housing; and(iii) providing states and localities with funds to develop their housing programs.9(i) Supporting the construction and operation of specific housing developments:These policies are known as supply-side or project based subsidies and include publichousing and several other programs, such as Section 8 New Construction, in which thefederal government helps subsidize the construction and sometimes the operationprivately owned low-income housing. The aim is to “remedy the acute shortage” ofdecent housing through a federally financed construction program that sought toeliminate “substandard and other inadequate housing.” The low-income housing taxcredit (LIHTC) program was authorized by the Tax Reform Act of 1986 to provide directsubsidies for the construction or acquisition of new or substantially rehabilitated rentalhousing for occupancy by lower-income households. Through 2003, the tax credit hashelped fund the development of more than 1.2 million housing units.(ii) Helping renters pay for privately owned housing: This has become thedominant form of low-income housing assistance. The government provides low-incomehouseholds with vouchers. Households in possession of vouchers receive the differencebetween the fair market rent in a locality—the median rent, estimated regularly for eachmetropolitan area by the Department