The document discusses rent control policies in New York City, where about half of the city's apartments are subject to rent control and the other half have market-determined rents. It provides an economic analysis of how rent control can result in deadweight loss by creating a price ceiling and disequilibrium between supply and demand for apartments. The analysis uses demand and supply graphs to illustrate the potential impacts on consumer surplus, producer surplus, and economic efficiency under rent control policies versus a free market.