When the central bank of Kancharapalem decides to lower the real policy rate during a recession, this action is intended to stimulate economic activity. A lower real policy rate reduces the cost of borrowing, which can encourage consumption and investment. This can be illustrated using the Aggregate Demand and Aggregate Supply (AD-AS) model.
In the AD-AS model, the Aggregate Demand curve (AD) slopes downward, indicating that at lower price levels, the quantity of goods and services demanded increases. The Aggregate Supply curve (AS) can be upward sloping in the short run, reflecting that at higher price levels, producers are willing to supply more goods and services.
When the real policy rate is lowered, the initial effect is to shift the AD curve to the right, from AD1 to AD2, as lower interest rates encourage more spending by consumers and firms. This shift leads to an increase in the equilibrium output from Y1 to Y2 and potentially a rise in the price level from P1 to P2, depending on the slope of the AS curve. The extent of the shift in AD depends on the expectations of the agents. If they expect the policy to be effective and the economy to improve, their increased confidence can lead to more spending and a larger rightward shift in AD.
Here is a representation of the graph:
"""Price Level
|
| AS
| ^
| /
| /
| /
|/__________> Output
P1 P2
Y1 Y2"""
In this graph, the vertical axis represents the price level, and the horizontal axis represents the output. The initial equilibrium is at the intersection of AD1 and AS, with price level P1 and output Y1. After the policy change, the new equilibrium is at the intersection of AD2 and AS, with a higher output Y2 and potentially a higher price level P2.
An example to illustrate this would be if the central bank lowers the real policy rate from 3% to 1%. Consumers who were previously saving might now find it more attractive to take out loans for big purchases like homes or cars due to the lower interest rates. Similarly, firms might decide to invest in new projects or expand their operations because the cost of financing is cheaper. These actions collectively increase the aggregate demand, moving the economy towards higher output and potentially higher prices.
The key concept here is the interest rate effect on aggregate demand. A lower real policy rate reduces the cost of borrowing, which can stimulate spending on consumption and investment, thereby increasing aggregate demand and potentially leading to higher output and price levels in the economy.