It is argued by most economists, including a number of neo-classical and Keynesian economists[9] that some forms of rent control regulations create shortages and exacerbate scarcity in the housing market by discouraging private investment in the rental market.[10] This analysis targeted nominal rent freezes, and the studies conducted were mainly focused on rental prices in Manhattan, or elsewhere in the United States.
https://en.wikipedia.org/wiki/Rent_regulation
https://psmag.com/economics/in-defense-of-rent-control