There is an inverse relationship between the supply and prices of goods and services when demand is unchanged. If there is an increase in supply for goods and services while demand remains the same, prices tend to fall to a lower equilibrium price and a higher equilibrium quantity of goods and services.

Supply Increase: price decreases, quantity increases. Supply Decrease: price increases, quantity decreases.

The law of supply states that there is a direct relationship between price and quantity supplied. In other words, when the price increases the quantity supplied also increases. This is represented by an upward sloping line from left to right.

When the demand curve shifts, it changes the amount purchased at every price point. For example, when incomes rise, people can buy more of everything they want. In the short-term, the price will remain the same and the quantity sold will increase. The same effect occurs if consumer trends or tastes change.

A change in demand means that the entire demand curve shifts either left or right. A change in quantity demanded refers to a movement along the demand curve, which is caused only by a chance in price. In this case, the demand curve doesn’t move; rather, we move along the existing demand curve.

An increase in demand and a decrease in supply will cause an increase in equilibrium price, but the effect on equilibrium quantity cannot be detennined. 1. For any quantity, consumers now place a higher value on the good,and producers must have a higher price in order to supply the good; therefore, price will increase.

Factors Affecting Demand

• Price of the Product. There is an inverse (negative) relationship between the price of a product and the amount of that product consumers are willing and able to buy.
• The Consumer’s Income.
• The Price of Related Goods.
• The Tastes and Preferences of Consumers.
• The Consumer’s Expectations.
• The Number of Consumers in the Market.

Factors that can shift the demand curve for goods and services, causing a different quantity to be demanded at any given price, include changes in tastes, population, income, prices of substitute or complement goods, and expectations about future conditions and prices.

A change in the quantity demanded refers to movement along the existing demand curve, D0. This is a change in price, which is caused by a shift in the supply curve. Similarly, a change in supply refers to a shift in the entire supply curve, which is caused by shifters such as taxes, production costs, and technology.