Supply is the different quantities of goods and services that firms are willing and able to produce at various price levels.
Quantity supplied is the amount of a good or service that is produced at a particular price level.
Below is a supply curve. Quantity supplied is one point on the curve (i.e. A, B, or C), and supply is the entire line, including all of the points that create it.
The law of supply states that the relationship between the price level and the quantity demanded of a good or service is direct, or positive. As the price level rises, firms are more willing or more able to produce a greater quantity, and, therefore, produce more. As the price level falls, firms are less willing or less able to produce the same quantity, and, therefore, produce less.
Using the chart above, when the price rises from P1 to P2, the quantity supplied increases from 2 units to 8 units. When the price drops from P3 to P2, the quantity supplied decreases from 12 units to 8 units.
💡The only thing that changes quantity supplied is the price of the good or service.
Determinants are factors that can cause the entire supply curve to increase or decrease. When there is an increase in supply (see graph below), the supply curve will shift to the right. At every price level, there is an increase in quantity supplied. When there is a decrease in supply (see graph below), the supply curve will shift to the left. At every price level, there is a decrease in quantity supplied.
There are several determinants of supply that cause the shift to the right (increase in supply) or the shift to the left (decrease in supply). We are going to use the acronym R-O-T-T-E-N as a way to remember all of the determinants.
💸 Unit 1: Basic Economic Concepts
1.2Opportunity Cost and the Production Possibilities Curve (PPC)
1.3Comparative Advantage and Trade
📈 Unit 2: Economic Indicators and the Business Cycle
2.1Circular Flow and GDP
2.6Real vs Nominal GDP
💲 Unit 3: National Income and Price Determination
3.5Equilibrium in Aggregate Demand-Aggregate Supply (AD-AS) Model
💰 Unit 4: Financial Sector
4.3Definition, Measurement, and Functions of Money
4.4Banking and the Expansion of the Money Supply
⚖️ Unit 5: Long-Run Consequences of Stabilization Policies
5.1Fiscal and Monetary Policy Actions in the Short-Run
5.3Money Growth and Inflation
5.4Deficits and the National Debt
🏗 Unit 6: Open Economy-International Trade and Finance
6.1Balance of Payments Accounts
6.4Effect of Changes in Policies & Economic Conditions on the Foreign Exchange Market
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