The Surprising Profits in Affordable Housing
New research from Columbia Business School reveals low-income rental units generate higher returns for landlords – inviting more competition could help lower rents
New research from Columbia Business School reveals low-income rental units generate higher returns for landlords – inviting more competition could help lower rents
New study from Columbia Business School finds rising interest rates reduce home buying and increase demand in the rental market, especially among first-time and low-income buyers
Professor Parinitha (Pari) Sastry is an assistant professor of finance at Columbia Business School. Her research focuses on climate change, financial intermediation, and real-estate markets. She received her B.A. from Columbia University and her finance Ph.D. from the Massachusetts Institute of Technology. She has worked previously at the Department of Treasury, Task Force on Climate-Related Financial Disclosures, Brookings Institution, and New York Fed.
Brian P. Lancaster is a Senior Lecturer in the Discipline of Finance at the Columbia Business School. Professor Lancaster teaches the following courses: Real Estate Finance, Real Estate Debt Markets, Residential Real Estate Finance: Dirt, Debt and Derivatives, Capital Markets and Investments, Real Estate Entrepreneurship, and Debt Markets in the MBA, EMBA, PhD and MS&E programs. Professor Lancaster received the Robert. W.
As a real estate professional, you can’t avoid it—everyone is talking about data centers. Without a doubt, it is the most exciting sector for real estate investment in 2025. Over the past week, I’ve had six in-depth conversations with experts and pored over hundreds of pages of research from real estate advisory firms, Wall Street analysts, credit rating agencies, technology blogs, and newspapers. While a short piece cannot fully do justice to this fascinating, interdisciplinary topic, I will attempt to distill key insights and open questions worth considering.
There is a lot of chatter in the housing world right now about what the Trump administration’s plans are with respect to housing policy, but one thing is clear - there has not been this much attention paid to housing and this much potential for favorable housing legislation and deregulation in a long time. This is the first time the President has been a lifelong real estate developer who appreciates the challenges of regulation and who is a big believer in private sector engagement. Recent reports that the Trump Administration is seeking significant cuts to the HUD workfor
New research from Professor Parinitha Sastry and her co-authors examines the challenges facing Florida’s homeowners insurance market.
The recent wildfires in Los Angeles highlight how suppressed insurance premiums and government policies incentivize Americans to settle in areas with a high climate risk, exacerbating economic and environmental disasters.
Motivated by the recent National Association of Realtors (NAR) settlement, this note examines the effects of reduced real estate agent commissions on home prices, housing turnover, and consumer welfare. Using a calibrated dynamic structural search model of the housing market, we explore how lowering agent commissions might influence market equilibrium. Our analysis highlights the importance of accounting for the dynamic nature of the housing market, consumer heterogeneity, and general equilibrium effects when assessing these outcomes.
Non-informational cues, such as facial expressions, can significantly influence judgments and interpersonal impressions. While past research has explored how smiling affects business outcomes in offline or in-store contexts, relatively less is known about how smiling influences consumer choice in e-commerce settings even when there is no face-to-face interaction.
A rent guarantee insurance (RGI) policy makes a limited number of rent payments to the landlord on behalf of an insured tenant unable to pay rent due to a negative income or health expenditure shock. We introduce RGI in a rich quantitative equilibrium model of housing insecurity and show it increases welfare by improving risk sharing across idiosyncratic and aggregate states of the world, reducing the need for a large security deposits, and reducing homelessness which imposes large costs on society.
I propose a dynamic equilibrium model of the rental markets that endogenously gives rise to defaults on rents and evictions. In the model, eviction protections make it harder to evict delinquent renters, but higher default costs to landlords increase equilibrium rents. I quantify the model using micro data on evictions, rents, and homelessness. I find that stronger eviction protections exacerbate housing insecurity and lower welfare. The key empirical driver of this result is the persistent nature of risk underlying rent delinquencies.
Professional house price forecast data are consistent with a rational model where agents must learn about the parameters of the house price growth process and the underlying state of the housing market. Slow learning about the long-run mean generates overreaction to forecast revisions and a modest response of forecasts to lagged realizations. Heterogeneity in signals and priors about the long-run mean helps the model account for cross-sectional dispersion in forecasts. Introducing behavioral biases helps improve the model's predictions for short-horizon overreaction and dispersion.
ASC 842, which requires balance sheet recognition of right-of-use (ROU) lease assets, resulted in a large increase in reported assets since 2019, thus impairing the time-series consistency of metrics that use assets (e.g., asset turnover). This paper shows that ROU assets can be estimated quite precisely using lease disclosure. Adding the estimated ROU asset for pre-ASC 842 observations substantially improves the ability of operating assets to explain sales. It also increases the ability of growth in operating assets to predict sales growth and explain analysts’ revenue growth forecasts.
Rules are being drafted to guide compliance with a 2019 New York City law that requires most of about 50,000 buildings, many over 25,000 square feet, to cut their greenhouse gas emissions by 40 percent by the end of this decade and to achieve net-zero emissions by 2050.
We show that the COVID-19 pandemic brought house price and rent declines in city centers, and price and rent increases away from the center, thereby flattening the bid-rent curve in most U.S. metropolitan areas. Across MSAs, the flattening of the bid-rent curve is larger when working from home is more prevalent, housing markets are more regulated, and supply is less elastic. Housing markets predict that urban rent growth will exceed suburban rent growth for the foreseeable future.
Working from home resulted in a sharp contraction in office demand. We built a valuation model to find that the office stock lost about 45% in value. More for low-quality buildings and in cities with a larger IT sector and less for trophy buildings. We discuss the implications for mortgage lenders and the vitality of cities.