F.W.EdgeWorth (English Economist) and Vilfredo Pareto (Italian Economist)criticised the Cardinal Utility Approach.They assumed that utility cannot be measured absolutely, but can be compared or ranked or ordered by ordinal numbers such as I, II, III and so on. Edgeworth first developed a more scientific approach to the study of consumer behaviour, known as “Indifference Curve Approach” in1881.In 1906, Vilfredo Pareto modified the
“Edgeworth Approach”. Again J.R.Hicks and R.G.D.Allen refined the Indifference Curve
Approach in 1934. Later, in 1939 J.R.Hicks
in his book “ Value and Capital” gave a final
shape to this “Indifference Curve Analysis”.
Scale of Preference:
This theory is also based on scale of
preference. A rational consumer usually
prefers the combination of goods which gives him maximum level of satisfaction.Thus, the consumer can arrange goods and their combination in order of their satisfaction. Such an arrangement of combination of goods in the order of level of satisfaction is called the “Scale of Preference”.
1. The consumer is rational and his aim is to derive maximum satisfaction.
2. Utility cannot be cardinally measured, but can be ranked or compared or ordered by ordinal number such as I, II, III and so on.
3. The Indifference Curve Approach is based on the concept “Diminishing Marginal Rate of Substitution”.
4. The consumer is consistent.This assumption is called as the assumption of transitivity. If the consumer prefers combination A to B and B to C, then he should prefer A to C. If A>B and B>C, then A>C.
An Indifference Schedule:
An indifference schedule may be defined
as a schedule of various combinations of two commodities which will give the same level of satisfaction. In other words,indifference Schedule is a table which shows the different combination of two goods that gives equal satisfaction to the consumer.
Table has five combinations of two
commodities Apple and Orange. Each of
these combinations give the consumer the same level of satisfaction without discrimination. In the schedule, the
combinations are arranged in such a way that the consumer is indifferent among the combinations. Hence, this schedule is called as, “Indifference Schedule”. He will neither be better off nor worse off whichever combination he chooses.