Concept Of Utility:
Jevon (1835-1882) was the first economist who introduced the concept of utility in economics. According to him ‘utility’ is the basis on which the demand of an individual for a commodity depends ‘Utility’ is defined as the power of a commodity or service to satisfy human want. Utility thus is the satisfaction which is derived by the consumer by consuming the goods. For example, cloth has a utility for us because we can wear it. Pen has a utility for a person who can write with it. The utility is subjective in nature. It differs from person to person. The utility of a bottle of wine is zero for a person who is non-drinker while it has a very high utility for a drinker.
Here it may be noted that the term ‘utility’ may not be confused with pleasure or unfulness which a commodity gives to an individual. Utility is a subjective satisfaction which consumer gets from consuming any good or service. For example, poison is injurious to health but it gives subjective satisfaction to a person who wishes to die. We can say that utility is value neutral.
Assumptions of cardinal utility analysis
The main assumptions or premises on which the cardinal utility analysis rests are as under.
(i) Rationality. The consumer is rational. He seeks to maximize satisfaction from the limited income which is at his disposal.
(ii) Utility is cardinally measurable. The utility can be measured in cardinal numbers such as 1, 3, 10, 15 etc. The utility expressed in imaginary cardinal numbers tells us a great deal about the preference of the consumer for a good.
(iii) Marginal utility of money remains constant. Another important premise of cardinal utility analysis is that the marginal utility of money spent on the purchase of a good or service should remain constant.
(iv) Diminishing marginal utility. It is also assumed that the marginal utility obtained from the consumption of a good by a consumer diminishes continuously as its consumption is increased.
(v) Independent utilities. According to the cardinalist school, the utility which is derived from the consumption of a good is a function of the quantity of that good alone. .If does not depend at all upon the quantity consumed of other goods. The goods, we can say, possess independent utilities and are additive.
(vi) Introspection method. The cardinalist school assumes that the behavior of marginal utility in the mind of another person can be judged with the help of self observation. For example, I know that as I purchase more and more of a good, the less utility I derive from the additional units of it. By applying the same principle, I can read other peoples mind and say with confidence that marginal utility of a good diminishes as they have more units of it.
Pareto, an Italian economist, severely criticized the concept of cardinal utility. He stated that utility is neither quantifiable nor addible. It can, however be compared. He suggested that the concept of utility should be replaced by the scale of preference. Hicks and Allen, following the footsteps of Pareto, introduced the technique of indifference curves. The Cardinal Utility approach is thus replaced by ordinal utility function.
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