Question

Time Current per capita capital Per capita income Savings per capita Rate of deterioration of capital...

Time

Current per capita capital

Per capita income

Savings per capita

Rate of deterioration of capital per capita

Next period per capita capital

Capital-Output Ratio

Growth rate of per capita income

t

k(t)

y(t)

sy(t)

(δ+n)k

k(t+1)

θ=k(t)/y(t)

(g*)

0

2.0

---

1

2

3

4

5

6

7

8

9

10

Population growth rate = .03

Savings rate = .5

capital depreciation rate = .2

capital share = .5

K(0) = 2

must be done by calculator, please show formula, not on excel

Homework Answers

Answer #1

To write the production function in per effective worker terms, dividing both sides by EL,

Y/EL = (K1/4EL3/4)/EL

y = k1/4

To reach the golden rule steady state, we must have Marginal product of capital, MPk = n + g +

MPk = (1/4)*k-3/4

so, (1/4)*k-3/4 = 0.02 + 0.03 + 0.1

On solving this we get, k* = 1.976

At this golden rule capital stock, y* = f(k*) = (k*)1/4 = (1.976)1/4 = 1.1856

To derive golden rule savings rate, we must have ( + n +g)k* = sgoldf(k*)

Using above calculations, 0.15*1.976 = sgold(1.1856)

sgold = 0.2964/1.1856 = 0.25 while the current saving rate is 0.30, thus, the economy is saving more.

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