Map of thailand for Thus, the expected payoff to each individual renter from rent control may be less than zero. The fact that price controls cause dead weight losses, entail costs, and lead to waste, raises questions about why they are so common. Part of the explanation is that officials sometimes commit errors. Price controls are sometimes put into place for the purpose of restraining price inflation. In 3rd-century Rome, devaluation of money caused rampant inflation. In 301, Emperor Diocletian imposed maximum prices in an attempt to stem this inflation. His edict set extensive controls over prices and wages, enforced with the death penalty. Map of thailand 2016.