Absence of transport cost is not an essential condition of pure competition. If the two conditions of pure competition are fulfilled, there can be no question of monopolistic control. In perfect competition, apart from the absence of monopoly, some other conditions are also essential, e.g., free entry and exit, the absence of transport cost, perfect knowledge.
In market equilibrium, supply is vertical line. The downward sloping demand curve shifts to the right. Then
If demand is inelastic, a change in the price will change total revenue in same direction. When demand is price inelastic, a given percentage change in price results in a smaller percentage change in quantity demanded. That implies that total revenue will move in the direction of the price change: an increase in price will increase total revenue, and a reduction in price will reduce it.
Which one of the following pairs of commodities is an example of substitutes?