Build SD model to analyze the following Keynesian model:

Consumption function :  C(t) = 200

+ 0.8Y(t)

Planned expenditures   :  E(t) = C(t) + I + G

Investment                  

:   I = 150

Government spending  :  G = 250

Income short-run

adjustment              : ΔY(t+1)

= 0.5 (E(t) – Y(t))