Product differentiation relates to how close one good or service is
seen as a substitute to another good or service. If consumers can
not see a difference between one product and another, the item is said
to be homogeneous.
If consumers do differentiate between the products
of different suppliers, the product is said to be heterogeneous.
If there are many firms operating in a market, then each individual
firm has little influence on the whole market. In these conditions, each
firm is likely to be a price taker. Any firm that tries to increase
its selling price will see consumers buying elsewhere. Each individual
firm is likely to sell at the market price, because they have little influence
on the market overall.
If some firms are large enough, or they have a product that is seen
as different and ''better'' than their competitors, then these firms can
influence the market price. These firms are said to be price makers.