The level of equilibrium income is determined by:
AD and AS:
- Aggregate demand (AD) represents the total spending in an economy, including consumption, investment, government spending, and net exports.
- Aggregate supply (AS) represents the total output of goods and services in an economy.
- The equilibrium income is determined at the point where aggregate demand equals aggregate supply.
- If aggregate demand is higher than aggregate supply, there will be a shortage, leading to an increase in production and income to meet the demand.
- If aggregate demand is lower than aggregate supply, there will be a surplus, leading to a decrease in production and income to adjust to the lower demand.
AD and national income:
- National income refers to the total income earned by individuals and businesses in an economy.
- Aggregate demand is influenced by factors such as consumption, investment, government spending, and net exports, which are all components of national income.
- Changes in aggregate demand can affect the level of national income and vice versa.
- In equilibrium, aggregate demand is equal to national income, indicating that the level of income is determined by the level of aggregate demand.
AD and Investment:
- Investment is a component of aggregate demand.
- Changes in investment spending can affect the level of aggregate demand and, consequently, the level of equilibrium income.
- Higher investment spending increases aggregate demand, leading to an increase in income.
- Lower investment spending decreases aggregate demand, leading to a decrease in income.
AD and Consumption:
- Consumption is the largest component of aggregate demand.
- Changes in consumption spending can impact aggregate demand and, subsequently, the level of equilibrium income.
- Higher consumption spending increases aggregate demand, leading to an increase in income.
- Lower consumption spending decreases aggregate demand, leading to a decrease in income.
In conclusion, the level of equilibrium income is determined by the interaction between aggregate demand and other factors such as aggregate supply, national income, investment, and consumption. These factors influence the level of spending in the economy and ultimately determine the level of equilibrium income.