Posted: April 19th, 2023
The Aggregate Supply/Aggregate Demand model
The Aggregate Supply/Aggregate Demand model and the microeconomic analysis of demand and supply in particular markets for goods, services, labour and capital have superficial resemblance but they also have many underlying differences. Using relevant examples where applicable, outline and discuss these differences. [12 marks)
The Aggregate Supply/Aggregate Demand (AS/AD) model and microeconomic analysis of demand and supply in particular markets share similarities in terms of their use of supply and demand curves to explain price and quantity outcomes. However, there are significant differences between these two models.
One key difference is that the AS/AD model considers the economy as a whole, while microeconomic analysis focuses on specific markets. In the AS/AD model, the aggregate demand and supply curves represent the total demand and supply for all goods and services in an economy, while microeconomic analysis examines the demand and supply for specific goods or services.
Another difference is that the AS/AD model incorporates macroeconomic variables such as inflation, unemployment, and economic growth, while microeconomic analysis does not. The AS/AD model shows how changes in these variables can impact the overall economy, while microeconomic analysis typically focuses on how changes in price and quantity affect individual markets.
In addition, the AS/AD model assumes that prices and wages are flexible and can adjust quickly to changes in supply and demand, while microeconomic analysis recognizes that prices and wages can be sticky and slow to adjust in the short term. For example, in a particular market for labor, wages may be slow to adjust to changes in supply and demand due to factors such as minimum wage laws or labor union contracts.
Lastly, the AS/AD model assumes that the economy is operating at full employment and potential output, while microeconomic analysis recognizes that markets can be characterized by imperfect competition and market failures, which can lead to suboptimal outcomes.
As such, while both the AS/AD model and microeconomic analysis use supply and demand curves to explain price and quantity outcomes, they differ in their scope, consideration of macroeconomic variables, treatment of price and wage flexibility, and assumptions about market characteristics.
Mankiw, N. G. (2020). Principles of macroeconomics (9th ed.). Cengage Learning.
Pindyck, R. S., & Rubinfeld, D. L. (2021). Microeconomics (10th ed.). Pearson.