Rent Control — a price ceiling, and what it does over time
Price ceiling · shortage · allocative inefficiency · short-run vs long-run supply
The situation
Rent control caps rents below the market level — and its effects sharpen over time. Berlin's 2020 rent freeze (the Mietendeckel) was struck down by Germany's constitutional court in 2021. New York City's mid-20th-century rent control froze rents so long that landlords couldn't afford upkeep — a textbook long-run supply collapse, leaving dilapidated buildings behind.
The economics
A maximum price set below equilibrium makes quantity demanded exceed quantity supplied, producing a persistent shortage. It triggers non-price rationing, falling quality, and informal or parallel markets. Crucially, the damage grows over time: supply is more elastic in the long run, so the shortage deepens as landlords exit or stop investing.
The evaluation
For — short-run affordability and tenant protection; equity during a housing crisis. Against — it cuts supply and investment over time, deepens the shortage, degrades quality, and misallocates housing (insiders keep cheap flats; newcomers are locked out). Most economists favour supply-side fixes instead.
This is a taste of the full bank
These four are part of a larger set of carefully chosen real-world examples — each picked to stretch across several syllabus areas, with built-in evaluation and the deployment phrases that turn a fact into marks. I share the complete bank with my students. Book a free class and let's talk about how it fits your exam.