Irvine, California — The long-held belief that increasing housing supply is the antidote to escalating home prices is being challenged by new research from the Federal Reserve and academic institutions. A study conducted by a team of researchers, including UC Irvine graduate student Schuyler Louie, suggests that the link between housing affordability and supply is not as straightforward as many have believed.

The findings indicate that while average income growth is closely tied to rising home prices, it has little correlation with the increase in housing supply. Instead, supply tends to expand more significantly in areas experiencing population growth, even in expensive markets like Los Angeles and San Francisco. This calls into question common narratives surrounding regulatory barriers, local opposition to development, and policies such as rent control as primary factors worsening the affordability crisis.

California offers a stark example of this issue. The state is notorious for its high housing costs, contributing to homelessness and outward migration. Yet, researchers assert that the underlying dynamics revolve more around disparities in income growth rather than mere supply constraints. Data spanning several decades reveal that until around 2000, house prices and median incomes rose in tandem. After that point, home price appreciation significantly outpaced income growth.

Moreover, the analysis suggests that differences in income distribution play a pivotal role in housing costs. The researchers found that the rise in average income closely mirrored the increase in house prices from 1975 to 2024. This indicates that inequality, rather than inadequate housing stock, may largely dictate affordability challenges.

When examining the period between 2000 and 2020, no discernible connection emerged between income growth and housing supply, suggesting that higher earners tend to invest in home improvements or better locations rather than seek additional properties. In contrast, new households entering a city stimulate demand for housing units, leading to an uptick in both prices and supply.

The study also delineates two types of demand affecting housing. When demand shifts toward higher quality housing, prices climb while the need for new units remains static. Conversely, population growth that stabilizes average incomes increases the demand for housing units, thereby elevating both prices and supply.

In summary, the research highlights that addressing the housing affordability crisis requires a nuanced understanding of labor market shifts, particularly concerning how economic growth is distributed across various income levels and geographic areas. This insight complicates traditional assumptions and emphasizes the need to reevaluate strategies aimed at making housing more accessible to all.