Policy function calculation from value function iterations

 

We consider the following switching model consisting of four states:

 

   for t=1,5,9,13,. . .

   for t=2,6,10,14,. . .

   for t=3,7,11,15,. . .

   for t=4,8,12,16,. . .

 

We then consider the corresponding set of Bellman equation:

 

 

 

 

 

where value functions on the right hand side are switched. Here,

 

 

In this case, the movement of capital soon gets into four-cycle process.

 

The points of four-cycle process are usually not steady-state points. For more states,

 

we can do the same thing.

 

Behavior of capital

 

 

The corresponding behavior of consumption

 

where the movement get into some cycle with four points after a few steps.

 

They are usually not stated-state levels.