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In economics , utility is a measure of preferences over some set of goods and services. The concept is an important underpinning of rational choice theory in economics and game theory , because it represents satisfaction experienced by the consumer of a good . A good is something that satisfies human wants . Since one cannot directly measure benefit, satisfaction or happiness from a good or service, economists instead have devised ways of representing and measuring utility in terms of economic choices that
Utility is usually applied by economists in such constructs as the indifference curve , which plot the combination of commodities that an individual or a society would accept to maintain a given level of satisfaction. Utility and indifference curves are used by economists to understand the underpinnings of demand curves , which are half of the supply and demand analysis that is used to analyze the workings of goods markets.
A pickup truck is a light duty truck having an enclosed cab and an open cargo area with low sides and tailgate. Once a work tool with few creature comforts, in the 1950s consumers began purchasing pickups for lifestyle reasons and by the 1990s less than 15 percent of owners reported use in work as the pickup truck's primary purpose. Today in North America, the pickup is mostly used like a passenger car and accounts for about 18 per cent of total vehicles sold in the US.