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onsider an open economy with flexible exchange rates. (a) With the aid of the IS-LM diagram, show the effects of a domestic fiscal expansion on domestic output and domestic interest rate

Question

onsider an open economy with flexible exchange rates. (a) With the aid of the IS-LM diagram, show the effects of a domestic fiscal expansion on domestic output and domestic interest rate

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Solution

The IS-LM model is a macroeconomic model that shows the relationship between interest rates and real output in the goods and services market and the money market. The IS curve represents all combinations of interest rates and output at which the goods market is in equilibrium, while the LM curve represents all combinations at which the money market is in equilibrium.

Here are the steps to show the effects of a domestic fiscal expansion on domestic output and domestic interest rate:

  1. Draw the initial IS-LM diagram: Draw the IS curve and the LM curve on a graph where the vertical axis represents the interest rate and the horizontal axis represents the output. The point where the IS curve intersects the LM curve is the initial equilibrium point (E0), which corresponds to the initial interest rate (i0) and the initial output (Y0).

  2. Fiscal expansion: A domestic fiscal expansion, such as an increase in government spending or a decrease in taxes, shifts the IS curve to the right from IS1 to IS2. This is because fiscal expansion increases aggregate demand, leading to an increase in output at each interest rate.

  3. New equilibrium: The economy moves to a new equilibrium point (E1) where the new IS curve (IS2) intersects the LM curve. This corresponds to a higher interest rate (i1) and a higher output (Y1).

  4. Effects on domestic output and interest rate: The shift of the IS curve to the right leads to an increase in both the domestic output and the domestic interest rate. The increase in output is due to the increase in aggregate demand caused by the fiscal expansion. The increase in the interest rate is due to the increase in demand for money caused by the increase in income and output.

In conclusion, a domestic fiscal expansion in an open economy with flexible exchange rates leads to an increase in both the domestic output and the domestic interest rate.

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