Does the low-income housing tax credit increase the supply of housing?

The low-income housing tax credit (LIHTC) was originated in conjunction with the Tax Reform Act of 1986 (TRA 86) to provide incentives for private sector production of low-income housing. In this note we examine whether these units have added to the existing stock or me-rely substituted for unsubsidized units that otherwise would have been built. We explicitly control for effects of the number of other supply-side (e.g., public housing, Section 8 New Construction, Section 236 housing) and demand-side (vouchers and Section 8 Certificates) subsidies. From estimations of a simple cross-state model of the determinants of the stock of housing per 1000 population, we find no significant relationship between the number of LIHTC units (land other subsidized units) built in a given state and the size of the current housing stock, suggesting a high rate of substitution. However, our test is not sufficiently powerful to reject some alternative null hypotheses that suggest a lower rate of substitution, and we make some suggestions for future research. (C) 2002 Elsevier Science (USA). All rights reserved.