Price gouging is a pejorative term referring to when a seller spikes the prices of goods, services or commodities to a level much higher than is considered reasonable or fair, and is considered exploitative, potentially to an unethical extent. Usually this event occurs after a demand or supply shock: common examples include price increases of basic necessities after hurricanes or other natural disasters. In precise, legal usage, it is the name of a crime that applies in some jurisdictions of the United States during civil emergencies. In less precise usage, it can refer either to prices obtained by practices inconsistent with a competitive free market, or to windfall profits. In the former Soviet Union, it was simply included under the single definition of speculation.