I’m writing this message to ask you some help with my simple model. I’m running a closed economy model with a government sector. My problem is the following: my model runs but I have some doubt on the IRF I got, especially for a public spending shock. In fact, when I have a positive shock on public spendings, public debt (bonds) decreases while it should be the opposite intuitively, I spent a lot of time trying to understand why I get this and it should be a detail but I did not find the solution. Moreover, it is very weird because the answer for all other variables looks ok. I attach to this message my .mod and steady-states file, if someone can have a quick look and tell me his/her point of view, I will be really grateful.
Thanks in advance.
Hugo
I used the same procedure of modelisation that I have found in a paper. I tried to put debt as a predetermined variable but it does not change anything, I still get the same result and moreover the response for r_b (interest on debt) is very weird when I put debt as a predetermined variable.
Changing the timing should affect the results. They cannot be identical. Regarding debt: it makes a difference whether the debt stock can jump immediately or not.
Did you check what happens to tax revenues after the shock. If B goes down, it must increase more than the spending.
Here are the IRFs that I get from a shock on G , there is my problem, very counter-intuitive. Debt goes down but also tau_k and tau_l (tax rates). Simplemodel10_IRF_e_g2.eps (31.7 KB)
When I define a variable T (tax revenues) , it increases a little bit more than the increase in public spendings. Here is the IRF. Could you please tell me if it makes sense ?