In: Economics
If a country has the following traits: y = 5k½marginal propensity to save = 0.4depreciation rate = 3%population growth rate = 5%
(a) What is the steady-state level of y?
(b) What is the steady-state level of c?
(c) What is the steady-state level of gross investment?
In the question above, if k began a period being 400, what would the amount of:
(a) depreciation taking place during that period?
(b) net investment taking place during that period?
At steady state level of capital , growth in capital stock is equal to zero. Here, investment gets equal to net depreciation.
At steady state,
savings rate / (depreciation rate + population rate) = Steady state level of capital / Steady state level of output
0.4 /(0.03+0.05) = k / 5k
k = 625 units
y = 125 units
2. Consumption = Total output - Investment
= 125 - (0.4 125)
= 75 units
3. Gross investment = Saving rate output
= 0.4 125
= 50
If k = 400, then net depreciation = (Depreciation rate + population rate ) capital stock
= (0.03+0.05) 400
= 32
Output = 5k = 520 = 100 units
Net investment = Gross investment - Net depreciation
= ( Saving rate output )- 32
= 0.4 100 - 32
= 8 units