Measuring GDP

Suppose consumption and investment are described by the following:

Here DI is disposable income, Y is GDP, and r, the interest rate, is measured in percentage points. (For example, a 5 percent interest rate is r = 5.) Exports and imports are as follows:

Government purchases are G = 800, and taxes are 20 percent of income. The price level is fixed and the central bank uses its monetary policy to peg the interest rate at r = 8.

a. Find equilibrium GDP, the budget deficit or surplus, and the trade deficit or surplus.

b. Suppose the currency appreciates and, as a result, exports and imports change to

Now find equilibrium GDP, the budget deficit or surplus, and the trade deficit or surplus.

 

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