At first, if all the consumers continue to buy newspapers, there will most likely be a shortage in supply. If P1 < P*, then QD1 > QS1. Therefore, a shortage exists and some consumers have incentive to bid up the price. As price increases, quantity supply increases, and quantity demand decreases. This will continue until equilibrium (P*) is met and the shortage will disappear. At equilibrium QD=QS=Q*, therefore no one has incentive to change behavior. Price remains constant. Figure 1 (attached) shows a graphical explanation.
If consumers in Denver decide that the Denver Newspaper Agency is charging too much for a newspaper, then consumers will stop buying the product. If P2 > P*, and QS1 > QD1, a surplus exists. Firms can’t sell all goods, therefore price decreases, quantity demand increases, and quantity supply decreases. This continues until equilibrium is met again at P*. This relationship is shown in Figure 2. The relationship also explains if The Denver Newspaper