Simple Keynesian Model of Income Determination The Simple Keynesian model is a theoretical framework that attempts to explain aggregate income determination...
Simple Keynesian Model of Income Determination
The Simple Keynesian model is a theoretical framework that attempts to explain aggregate income determination in an economy. It assumes a closed economy, meaning that all factors of production are perfectly allocated and that there is no international trade.
Assumptions:
Homogeneous good production: Production of a good is constant and homogeneous, meaning that the production process does not depend on the level of production.
Perfect competition: Firms produce infinitely many identical goods and services at a constant price.
No income effect on production: The production of a good is not affected by changes in the price of the good.
No capital accumulation: Firms do not save or invest, and they do not have capital goods.
Key Concepts:
Aggregate demand: The total quantity of a good or service produced in an economy.
Total income: The total amount of money circulating in the economy.
Employment: The number of people employed in the economy.
Price level: The average price of a good or service.
Interest rate: The cost of borrowing money.
Income Determination:
The Simple Keynesian model explains aggregate income determination through the following steps:
Production: Firms produce a fixed quantity of output at a given price level.
Price level adjustment: When aggregate demand increases, firms produce more output to fill up the available market.
Employment adjustment: As output increases, firms hire more workers to produce the additional output.
Aggregate demand adjustment: When aggregate demand decreases, firms produce less output to fill up the available market.
Price level adjustment: The price level falls as aggregate demand decreases.
Interest rate adjustment: In a recession, the central bank may lower the interest rate to increase investment and stimulate aggregate demand.
Implications:
The Simple Keynesian model has several implications for economic behavior, including:
Full employment: Under perfect competition, full employment is achieved when aggregate demand is equal to aggregate supply.
Price stability: The price level is stable under perfect competition when aggregate demand is constant.
Recession: During a recession, aggregate demand decreases, leading to a decrease in output, employment, and prices.
Output gap: The gap between aggregate supply and demand is the output gap.
Conclusion:
The Simple Keynesian model provides a basic framework for understanding aggregate income determination in a closed economy. It is a useful tool for understanding the relationships between output, employment, prices, and interest rates in an economy