Housing supply and development contributions: a case study of sidewalks in Seattle

Nestor Garza and Michael Goldman

International Journal of Housing Markets and Analysis, 2023, vol. 18, issue 1, 272-290

Abstract: Purpose - This study aims to test the effect of Seattle’s discontinuous sidewalk requirement, on the number of housing units per construction permit. Design/methodology/approach - This study uses discontinuity linear regression (DLR) on a database of Seattle’s housing construction permits during January-2015 to January-2018, controlled by 51 socioeconomic, planning and geographic variables. The sidewalk requirement is continuous inside the designated urban villages; however, it is spatially and quantitatively discontinuous in the rest of the city: certain blocks at certain locations require sidewalks’ design and construction in permits with six or more housing units. DLR detects the effect of the discontinuity while controlling for a vast array of confounding variables. Findings - The primary finding is that the discontinuous requirement reduces the number of housing units in about 75% of a housing unit per permit, which at the aggregate level amounts to around 335 fewer housing units during the period of analysis. Research limitations/implications - The database is relatively small, which has limited a more thorough specification process and robustness tests. Originality/value - Besides directly testing the effect of a discontinuous in-kind development contribution, the research setup allows to discuss a wider, more structural problem: the possibility of contributions avoidance due to spatial substitution. In contrast, spatially continuous (i.e. city-level) contributions cannot be avoided by performing spatial substitution, and they are internalized by the housing supply side (market-neutral).

Keywords: Spatial economic analysis; Discontinuity linear regression; In-kind contributions; Development contributions; Sidewalks (search for similar items in EconPapers)
Date: 2023
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Persistent link: https://EconPapers.repec.org/RePEc:eme:ijhmap:ijhma-07-2023-0090

DOI: 10.1108/IJHMA-07-2023-0090

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