Research

My research asks how housing supply—including both new construction and the ongoing transformation of the existing housing stock—shapes who gets to live where, and with what consequences for inequality. I pursue this across three connected pillars. You can find my full list of publications or my Google Scholar profile.

Housing supply and neighborhood change

I examine how access to housing and neighborhoods is governed through housing supply and the transformation of the existing housing stock. Methodologically, I use computational approaches to analyze administrative and commercial microdata. This approach allows me to observe these processes at fine spatial and temporal scales and to connect policy and market conditions to housing stock and household-level residential mobility outcomes.

Neighborhood change, gentrification, and displacement

I study how neighborhood change, including gentrification and persistent disinvestment, shapes who can stay at a place, who moves in, and who is pushed out by analyzing consumer big data that tracks their residential movements over time.

Song, T. & Reid, C. (2026). The Implications of Naturally Occurring Affordable Housing (NOAH) Sales for Residential Mobility. Journal of the American Planning Association, 1–15.

Oakland streetscape

Housing and land use policies

Planners and policymakers are increasingly seeking housing and land use policies, such as zoning reforms, to expand the supply base and improve affordability and neighborhood access. However, these policies are also often met with concerns about gentrification and displacement. My research examines how the intensity, location, and form of development shape access differently across neighborhoods and groups, asking when and where new supply mitigates or intensifies housing exclusion.

Davis, J., Song, T. & Chapple, K. (2026). How Does Upzoning Impact Residential Mobility Among Low-Income Households? Evidence from New York City. Housing Policy Debate, 1–21.

Chapple, K. & Song, T. (2025). Can New Housing Supply Mitigate Displacement and Exclusion? Evidence from Los Angeles and San Francisco. Journal of the American Planning Association 91(1), 1–15.

Construction activities in Toronto

Demolition and redevelopment

Often overlooked in the housing supply debate is the transformation of the existing stock—the demolitions and redevelopment that quietly reshape neighborhoods. I ask what demolition and redevelopment actually become on the ground—what replaces what is torn down, where, and for whom—using building permit and parcel records, and taking seriously the measurement choices involved in studying redevelopment with local administrative data.

Song, T.. What Counts as a Demolition and Redevelopment? Local Permit and Parcel Data Infrastructure and Measurement Choices. In preparation

Race, immigration, and housing

My second pillar of research examines how immigration reshapes—and is simultaneously shaped by—racialized boundaries of belonging in housing markets. Focusing on Asian populations in the United States and Canada, immigrant-majority and critically underrepresented groups in housing research, I trace how historical and contemporary land use regimes, housing policies, and racialized political and media narratives reproduce differential inclusion and inequality across scales.

Divergent immigrant incorporation in housing access

My dissertation challenges the treatment of Asians as a monolithic “other” within the Black–White binary paradigm, arguing that this categorization reinforces racial inequality by perpetuating the “model minority” stereotype. I argue that prior research has obscured significant housing disparities within the diverse pan-ethnic Asian American community, and that by attending to this diversity, we can observe divergent patterns of incorporation. I also show how policies continue to stratify Asian American housing outcomes despite significant gains in socioeconomic attainment, complicating contemporary narratives around race and class in housing access.

Song, T.. Immigration, Housing Markets, and Ethnic Divergence in Asian American Homeownership, 2000–2019. Under review

Song, T.. How Does Suburban Housing Supply Shape Asian American Segregation?. In preparation

San Francisco Chinatown

Racialized narratives and legislating housing exclusion

While immigration debates have traditionally centered on labor market competition, housing affordability has emerged as a growing site of politicization—often with a focus on Asian, particularly Chinese, immigrants. Anglosphere countries such as Canada, Australia, and New Zealand have implemented taxes and restrictions aimed at limiting non-citizen home purchases, framing them as a response to rising housing costs. In the United States, Texas and Florida have legislated property-purchase bans targeting Chinese nationals, including immigrants in the country. I am interested in how such policies both reflect and reinforce racialized narratives of Asian immigrants, drawing on historical parallels such as the Alien Land Laws, and I quantitatively assess the impacts of these restrictive policies on the housing market.

Historical anti-Japanese housing sign

Data infrastructure

Understanding housing and neighborhood exclusion requires measuring who moves, who stays, and who is missed entirely. My methodological work evaluates new consumer and administrative datasets for capturing residential mobility and exclusionary dynamics at fine spatial scales, while developing best practices to address the data biases that can distort the representation of marginalized and underrepresented groups.

I am extending this agenda to building permits and other local administrative data that have significant potential for research, studying demolitions and property transformations as well as the planning and neighborhood conditions associated with them.

Ramiller, A., Song, T., Parker, M. & Chapple, K. (2024). Residential Mobility and Big Data: Assessing the Validity of Consumer Reference Datasets. Cityscape 26(3), 227–239.