The document discusses various types of maximum prices or price caps that governments and regulators impose, including caps on housing rents, energy prices, CEO pay, mobile roaming charges, water prices, payday loan interest rates, and pension charges. It analyzes the effects of price caps using supply and demand diagrams, noting they may lead to shortages and black markets. The document also evaluates the merits and drawbacks of price caps in different markets, such as increasing fairness but also potentially reducing investment if profits fall.