Q1) Suppose GDP is GH¢ 8 trillion, taxes are GH¢ 1.5 trillion, private saving is GH¢ 0.5 trillion and public saving is GH¢ 0.2 trillion. Assuming this economy is closed. Calculate
a) consumption
b) Government purchases
c) National saving
d) Investment
Q2) The following are the exchange rate between Ghana cedi (GH¢) and the US Dollar ( USD) at times T and T+1.
Exchange rate at T is GH¢ 4.00/USD
Exchange rate at T+1 is GH¢ 5.00/USD.
a) Find the rate of appreciation of the US Dollar against the Ghana cedi from T to T+1.
b) The rate of depreciation of the Ghana cedi against the US Dollar from T to T+1.
c) Are the answers in (a) and (b) the same or equivalent? Explain.
question1
closed economy: Y=C+I+G
a) Consumption
Y=C+I+G
8=C+0.7+1.3
C=8-2
C=6trillion
b) Government purchases
Public savings =(T-G)
0.2=1.5-G
G=1.5-0.2
=1.3trillion
c) National saving
Private saving + public saving (0.2 +0.5) =0.7trilion.
d) Investment
National saving=I=Private saving + public saving
Which is (0.2 +0.5) =0.7trilion.
Question2
Appreciate - when a currency becomes more valuable relative to another currency; a currency appreciates when you need more of another currency to buy a single unit of a currency.
Depreciate-when the value of a currency decreases relative to another currency; a currency depreciates when you need less of another currency to buy a single unit of a currency.
Exchange rate A= unit of currency A /# of units of currency
a). exchange rate T=5.0UD/4.0USD=2.25USD
b) exchange rate T+1=4.0USD/5.0USD=0.8USD
c). the answer in a and b cannot be same as it is depreciation and appreciation.
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