Which of the following is not an assumption of 'Consumer Behaviour Theory'?

Question

Accepted Answer

The correct option is 4:
Utility of every goods depends upon utility of other goods. This statement is not a fundamental assumption of the basic 'Consumer Behaviour Theory' (specifically, the Cardinal Utility Analysis or the core Indifference Curve Analysis). These classical theories primarily assume *independent utility*, meaning the utility a consumer derives from one good is independent of the utility derived from consuming other goods. The idea that the utility of one good *depends upon* the utility of other goods describes concepts like complementary goods or substitute goods, which are *consequences* or *derivations* of consumer choice theory, not baseline assumptions upon which the entire theory is built. The fundamental models focus on how a consumer maximizes satisfaction from individual goods given constraints, assuming each good's utility can be assessed separately in the initial framework.

The incorrect option is 1:
Consumer is rational. Rationality is the cornerstone of Consumer Behaviour Theory. This assumption means the consumer makes consistent choices and aims to achieve the highest possible level of satisfaction (utility) given their limited income and the prices of goods.

The incorrect option is 2:
Consumer is best judge of his interest. This assumption implies that the consumer knows their own preferences and tastes better than anyone else, and these preferences are consistent. Their choices are based on their internal assessment of which bundle of goods provides them the most satisfaction.

The incorrect option is 3:
Consumer wants to maximise his level of satisfaction. This is known as the 'utility maximization principle' and is the primary objective of the consumer in economic models. The entire framework of consumer theory, whether using cardinal numbers or indifference curves, is built around this goal.