Q.Explain the exceptions to the Law of Demand.

A small number of well-recognised cases run counter to the usual inverse price-quantity relationship, each for its own distinct economic reason.

The Law of Demand describes the usual inverse relationship between price and quantity demanded, but a few well-recognised cases run counter to it.

1. Giffen Goods. Named after the statistician Sir Robert Giffen, a Giffen good is a strongly inferior good — typically a staple food forming a large share of a very poor household's budget. When its price rises, the household's real income falls so sharply that it can no longer afford the small quantity of superior food it was also buying; to maintain adequate food intake, it is forced to buy more, not less, of the now-costlier staple, cutting further into its purchases of superior food instead. Here the negative income effect of the price rise outweighs the normal substitution effect, so demand for the staple rises as its price rises — a genuine violation of the law.

2. Veblen Goods (Prestige Goods). Named after Thorstein Veblen and his idea of conspicuous consumption, a Veblen good — diamonds, luxury cars, premium branded goods — is bought partly because it is expensive, its high price signalling status or exclusivity. A price fall can reduce demand (the good loses prestige value), while a price rise can raise demand (it becomes a stronger status symbol) — the exact opposite of the Law of Demand's usual direction.

3. Expectations of Future Price Changes. If buyers expect a commodity's price to rise further soon, they may buy more right now even at today's already-higher price, to avoid an even higher price later — demand rises together with the current price rise. Symmetrically, if a further price fall is expected, buyers may postpone purchases even at today's lower price, waiting for it to fall further. …

Students often list the exceptions by name only, without explaining WHY each one violates a specific assumption of the Law of Demand — a full-mark long answer must connect each exception back …