The cardinal utility approach is a method of analyzing and measuring consumer utility, or satisfaction, in economics. It is based on the assumption that utility, or the satisfaction a consumer derives from a good or service, can be quantified and measured on a numerical scale. This approach contrasts with the ordinal utility approach, which assumes that utility can only be ranked or ordered, but not quantified.
The concept of utility was first introduced by the economist Jeremy Bentham in the 18th century as a way to measure the happiness or pleasure that an individual derives from a particular action or consumption choice. Bentham believed that utility could be quantified and that the utility of different actions or choices could be compared and ranked based on their ability to produce happiness or pleasure.
The cardinal utility approach was developed in the late 19th and early 20th centuries by economists such as Alfred Marshall and Francis Edgeworth. They argued that utility could be measured and quantified using a numerical scale, rather than simply ranked or ordered. This approach was based on the assumption that there is a consistent and stable relationship between the amount of a good or service consumed and the resulting utility or satisfaction.
Under the cardinal utility approach, the utility derived from a particular good or service is considered to be a function of the amount consumed. For example, the utility of a slice of pizza may increase as the number of slices consumed increases, but at some point, the marginal utility of each additional slice will begin to decrease. This is known as the law of diminishing marginal utility, which states that the additional utility derived from consuming an additional unit of a good or service will eventually decrease as the quantity consumed increases.
The cardinal utility approach has been widely used in economics to analyze consumer behavior and to understand how individuals make consumption decisions. It has also been used to analyze the effects of changes in the price of goods and services on consumer demand, as well as to evaluate the efficiency of different market structures and policies.
However, the cardinal utility approach has been criticized by some economists for its assumption that utility can be accurately measured and quantified. Some have argued that utility is subjective and may vary significantly from person to person, making it difficult to accurately measure and compare. Despite these criticisms, the cardinal utility approach remains an important and widely used tool in economics for understanding and analyzing consumer behavior.