Researcher at @harvard-jchs.bsky.social focused on housing, demographics, migration, inequality, and climate change.
Riordan Frost
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Happy #MapMonday! Rural home prices soared after the pandemic, by 36% in non-metro counties and fully 47% in vacation counties from 2020–2023, per new work from my @harvard-jchs.bsky.social colleagues @aherm.bsky.social & @pjwhit.bsky.social. www.jchs.harvard.edu/blog/home-pr...
Happy #MapMonday! Where are mobile homes most vulnerable to flooding? Find out in this interactive map from Headwaters Economics: headwaterseconomics.org/natural-haza.... Mobile homes are key to housing affordability, making these climate risks especially urgent to understand and address.
How important has immigration been for recent state population growth? My new @harvard-jchs.bsky.social blog post has an interactive state map exploring this question: www.jchs.harvard.edu/blog/populat.... The patterns imply that the recent & projected declines will be felt unevenly. #MapMonday
Happy #MapMonday! In top homebuilding metros, immigrants play a major role in supplying housing. Check out this bubble map (size = building permits, color = foreign-born share of the construction trades) in my latest @harvard-jchs.bsky.social blog: www.jchs.harvard.edu/blog/homebui...
New ACS data show US household mobility hit another record low in 2024, driven by homeowners staying put amid high prices & rates—especially younger owners. In my @harvard-jchs.bsky.social post, I unpack the data and reflect on what may have happened in 2025: www.jchs.harvard.edu/blog/househo...
Immigration fell sharply in 2025, dragging down US population growth. Census projects that immigration will be even lower in 2026, which would likely result in historically low growth. I explore how this might affect states in a new @harvard-jchs.bsky.social blog www.jchs.harvard.edu/blog/populat...
Household mobility fell to its lowest rate on record in 2024, with just over 1 in 10 households moving. Homeowners drove the decline as they faced high interest rates and home prices, while renter mobility stayed flat. @riordanfrost.bsky.social
www.jchs.harvard.edu/blog/househo...
#MapMonday: how did sheltered homelessness change by state in Jan 2025? Per @airbrycki.bsky.social, an overall decline was driven by drops in NY, IL, CO & MA, offsetting increases elsewhere, including a hurricane-related jump in NC: www.jchs.harvard.edu/blog/homeles... @harvard-jchs.bsky.social
With high interest rates and prices, houses are less affordable than almost any time in recent memory. "The promise of the Sun Belt has often been more affordability... but as that wanes, that could discourage people," says @riordanfrost.bsky.social.
www.theatlantic.com/family/2026/...
Our Center seeks applications for a 𝗥𝗲𝘀𝗲𝗮𝗿𝗰𝗵 𝗔𝘀𝘀𝗶𝘀𝘁𝗮𝗻𝘁 to research topics related to home improvement and repair markets, housing preservation and adaptation, disaster recovery and climate resilience, demographics and finances, housing policy, and more.
www.jchs.harvard.edu/research-ass...
