• San Francisco
• New York
• Literally any other city with rent control

https://www.brookings.edu/articles/what-does-economic-evidence-tell-us-about-the-effects-of-rent-control/

New research examining how rent control affects tenants and housing markets offers insight into how rent control affects markets. While rent control appears to help current tenants in the short run, in the long run it decreases affordability, fuels gentrification, and creates negative spillovers on the surrounding neighborhood.

Over the long term, rent control has never seen more positive benefits than negative ones, regardless of city.

Rent controlled properties create substantial negative externalities on the nearby housing market, lowering the amenity value of these neighborhoods and making them less desirable places to live.

https://iea.org.uk/media/rent-controls-do-far-more-harm-than-good-comprehensive-review-finds/

• However, 14 out of 17 studies found that rent control leads to higher rents in the uncontrolled sector.
• 12 out of 16 studies found negative effects on housing supply, while 11 out of 16 studies found negative impacts on new construction.
• 15 out of 20 studies found rent control leads to reduced housing quality and maintenance.
• 25 out of 26 studies found rent control reduces residential mobility.
• All 14 studies examining the issue found rent control leads to misallocation of housing.

https://financialpost.com/real-estate/rent-controls-hurt-rental-supply

We reviewed the studies cited by the author and found they all unequivocally demonstrated that rent controls contribute to a slowdown in rental supply, thus hurting the very people that rental advocates intend to help.

[…]

We were again surprised to discover that the IJHP paper painted a completely different picture. The authors said “more restrictive rental market legislation generally has a negative impact on both new housing construction and residential investment.” They concluded that the “received wisdom among economists of a negative construction and investment effect of rent controls seems to hold.”

https://capx.co/rent-controls-never-never-work

The issue with rent controls is not that they are novel or radical. The issue with them is just that every time they are tried, the results are exactly what the Economics 101 textbook would predict. They lead to a decline in the supply of rental properties, a decline in housebuilding rates, a slowdown in tenant mobility, a misallocation of existing properties, and a decline in the quality of rental housing.

https://www.economicsobservatory.com/does-rent-control-work

This study also sheds light on an important behavioural response to rent control by owners of rental properties: landlords substituted to other types of real estate (such as properties exempt from rent control). This lowered the housing supply and shifted it towards less affordable types of housing, leading to rents rising at an even higher rate.

This finding is largely consistent with the predictions of basic microeconomic models: rent controls lower the price of housing and at this lower price less housing is offered (Glaeser and Luttmer, 2003). Housing quality is also reduced as landlords can no longer make up losses from renovating properties by raising rents (Sims, 2007).

Reality doesn’t give two shits about ideology, it cares only about facts.