Changes in Supply - Shifts in the Supply Curve: 

The supply curve can also move to the left or to the right from its current location. An increase in the supply shifts the entire relevant curve to the right, while a decrease shifts the curve to the elft. The determinants of supply include: 

• Input prices or costs of production
• Technology
• Number of sellers in the market
• Supplier expectations
• Changes in prices of goods using the same resources 

Inputs are the resources use to produce the goods. If the price of any of these resources increase, the cost of production will increase and less will be offered at all prices. This is a decrease in supply and it will shift the supply curve to the left. A decrease in input prices has the opposite effect, by reducing the cost of production and causing suppliers to offer more al all prices. This is an increase in supply, which shifts the supply curve to the right.

Technology also has important effects on supply because many production processes involve some sort of technology. When technology improves, it becomes more profitable to produce goods that rely on technology. This causes sellers to offer more at all prices, which is an increase in supply.

Supplier's expectations influence what happens in the marketplace, because if sellers expect price to rise, they will wait to send their goods to market. Because the price is as yet unchanged, this is a decrease in supply which would in turn cause price to rise and vice versa.

When a good is taxed, it becomes less profitable to produce and supply will decrease as a result. When a good is subsidized, it becomes more profitable and supply increases.