Suppose a demand-driven economy in which people consume in the current period some fraction of
their income in the previous period (described by the following equations):
Yt = Ct + It + Gt
Ct = cYt−1, 0 < c < 1
It = I0
Gt = G0
问:Suppose I0=200, G0=600 and Y0=3000 (initial conditions). What will the new
long-run equilibrium GNP value be? How many periods are required for 80% of
GNP change (from initial condition to equilibrium) to be realized?