# Ramsey yet again **URL:** \ **Category:** Dynare v4 (legacy)\ **Created:** [26 March 2009 14:35 UTC](https://forum.dynare.org/t/ramsey-yet-again/986 "2009-03-26T14:35:07Z")\ **Posts on this page:** 13\ **Page:** 1
**Author:** ![jrr201](https://forum.dynare.org/letter_avatar_proxy/v4/letter/j/58956e/32.png) [@jrr201](https://forum.dynare.org/u/jrr201)\ **Post date:** [26 March 2009 14:35 UTC](https://forum.dynare.org/t/ramsey-yet-again/986/1 "2009-03-26T14:35:07Z")
Hi, I would like to get the example of ramsey policy running, from [dynare.org/DynareWiki/OptimalPolicy](http://www.dynare.org/DynareWiki/OptimalPolicy) When I run it, after it starts the matlab computing, I get the following error messages. I would be very grateful if someone could help me to get this example working - thank you in advance: ??? Error using ==\> ramsey\_static Too many input arguments. Error in ==\> dynare\_solve at 72 fvec = feval(func,x,varargin{:}); Error in ==\> dr1 at 83 oo\_.steady\_state = dynare\_solve(‘ramsey\_static’,oo\_.steady\_state,0,M\_,options\_,oo\_,it\_); Error in ==\> resol at 101 [dr,info,M\_,options\_,oo\_] = dr1(dr,check\_flag,M\_,options\_,oo\_); Error in ==\> stoch\_simul at 40 [oo\_.dr, info] = resol(oo\_.steady\_state,0); Error in ==\> ramsey\_policy at 25 info = stoch\_simul(var\_list); Error in ==\> ramsey at 99 ramsey\_policy(var\_list\_); Error in ==\> dynare at 102 evalin(‘base’,fname) ; ---
**Author:** ![stepan-a](https://forum.dynare.org/user_avatar/forum.dynare.org/stepan-a/32/6652_2.png) [@stepan-a](https://forum.dynare.org/u/stepan-a)\ **Post date:** [26 March 2009 15:02 UTC](https://forum.dynare.org/t/ramsey-yet-again/986/2 "2009-03-26T15:02:28Z")
Hi, What is your version of Dynare? If I replace the variable **inf** by **inflation** in the example (with the last version of the preprocessor you cannot use inf as a variable name… We will fix this asap. I changed the example in the wikipage), dynare runs smoothly. Best, Stéphane. ---
**Author:** ![jrr201](https://forum.dynare.org/letter_avatar_proxy/v4/letter/j/58956e/32.png) [@jrr201](https://forum.dynare.org/u/jrr201)\ **Post date:** [26 March 2009 17:29 UTC](https://forum.dynare.org/t/ramsey-yet-again/986/3 "2009-03-26T17:29:00Z")
Thank you Stephane, I have version 4.0.3. I tried with inflation (note that on your update on the wiki you didn’t change inf from the LHS of the inflation equation), but this doesn’t work. I still get the same error message: ??? Error using ==\> ramsey\_static Too many input arguments. , followed by various other error messages, Jack ---
**Author:** ![stepan-a](https://forum.dynare.org/user_avatar/forum.dynare.org/stepan-a/32/6652_2.png) [@stepan-a](https://forum.dynare.org/u/stepan-a)\ **Post date:** [26 March 2009 17:39 UTC](https://forum.dynare.org/t/ramsey-yet-again/986/4 "2009-03-26T17:39:53Z")
Ok. I will try with 4.0.3 (I tried with the snapshot version). Thanks for reporting the error on the wikipage. Stéphane. ---
**Author:** ![stepan-a](https://forum.dynare.org/user_avatar/forum.dynare.org/stepan-a/32/6652_2.png) [@stepan-a](https://forum.dynare.org/u/stepan-a)\ **Post date:** [27 March 2009 09:32 UTC](https://forum.dynare.org/t/ramsey-yet-again/986/5 "2009-03-27T09:32:38Z")
Hi Jack. I am not able to reproduce your bug, even using dynare 4.0.3. Can you post the output of ```auto which dynare ``` Best, Stéphane. ---
**Author:** ![jrr201](https://forum.dynare.org/letter_avatar_proxy/v4/letter/j/58956e/32.png) [@jrr201](https://forum.dynare.org/u/jrr201)\ **Post date:** [27 March 2009 10:04 UTC](https://forum.dynare.org/t/ramsey-yet-again/986/6 "2009-03-27T10:04:11Z")
Stephane, Here is the output from when i ran the mod file with snapshot version 4: ```auto >> dynare ramsey Configuring Dynare ... [mex] Generalized QZ. [mex] Sylvester equation solution. [mex] Kronecker products. [mex] Sparse kronecker products. [mex] Fast model evaluation. Starting Dynare ... Starting preprocessing of the model file ... Evaluating expressions...done WARNING: can't find a numeric initial value for y, using zero WARNING: can't find a numeric initial value for inflation, using zero WARNING: can't find a numeric initial value for r, using zero WARNING: can't find a numeric initial value for y_, using zero WARNING: can't find a numeric initial value for inf_, using zero WARNING: can't find a numeric initial value for gammarr, using zero WARNING: can't find a numeric initial value for gammax0, using zero WARNING: can't find a numeric initial value for gammac0, using zero WARNING: can't find a numeric initial value for rbar, using zero 2 equation(s) found Processing derivation ... Processing Order 1... done Processing Order 2... done 1 equation(s) found Processing derivation ... Processing Order 1... done Processing Order 2... done Processing outputs ...done Preprocessing completed. Starting Matlab computing ... ??? Error using ==> ramsey_static Too many input arguments. Error in ==> dynare_solve at 72 fvec = feval(func,x,varargin{:}); Error in ==> dr1 at 85 oo_.steady_state = dynare_solve('ramsey_static',oo_.steady_state,0,M_,options_,oo_,it_); Error in ==> resol at 102 [dr,info,M_,options_,oo_] = dr1(dr,check_flag,M_,options_,oo_); Error in ==> stoch_simul at 40 [oo_.dr, info] = resol(oo_.steady_state,0); Error in ==> ramsey_policy at 25 info = stoch_simul(var_list); Error in ==> ramsey at 97 ramsey_policy(var_list_); Error in ==> dynare at 125 evalin('base',fname) ; ``` ---
**Author:** ![stepan-a](https://forum.dynare.org/user_avatar/forum.dynare.org/stepan-a/32/6652_2.png) [@stepan-a](https://forum.dynare.org/u/stepan-a)\ **Post date:** [27 March 2009 11:12 UTC](https://forum.dynare.org/t/ramsey-yet-again/986/7 "2009-03-27T11:12:23Z")
This is weird… I guess we do not have the same mod file. Can you post your mod file? Stéphane. ---
**Author:** ![jrr201](https://forum.dynare.org/letter_avatar_proxy/v4/letter/j/58956e/32.png) [@jrr201](https://forum.dynare.org/u/jrr201)\ **Post date:** [27 March 2009 11:20 UTC](https://forum.dynare.org/t/ramsey-yet-again/986/8 "2009-03-27T11:20:45Z")
I just opened the mod file I used, and this is the code: var y inflation r; varexo y\_ inf\_; parameters delta sigma alpha kappa gammarr gammax0 gammac0 rbar lambda1 lambda2; delta = 0.44; kappa = 0.18; alpha = 0.48; sigma = -0.06; lambda1 = 0.5; lambda2 = 0.1; model(linear); y = delta \* y(-1) + (1-delta) \* y(+1) + sigma _(r - inflation(+1)) + y\_; inflation = alpha \* inflation(-1) + (1-alpha) \* inflation(+1) + kappa_y + inf\_; end; shocks; var y\_; stderr 0.63; var inf\_; stderr 0.4; end; planner\_objective inflation^2 + lambda1_y^2 + lambda2_r^2; ramsey\_policy(planner\_discount=0.95); It should be the same as the one on the wiki. ---
**Author:** ![stepan-a](https://forum.dynare.org/user_avatar/forum.dynare.org/stepan-a/32/6652_2.png) [@stepan-a](https://forum.dynare.org/u/stepan-a)\ **Post date:** [27 March 2009 15:14 UTC](https://forum.dynare.org/t/ramsey-yet-again/986/9 "2009-03-27T15:14:08Z")
Thanks Jack. I am still unable to reproduce your problem… Even using the same mod file. I really don’t understand. What are your version of matlab and your platform ? Stéphane. ---
**Author:** ![jrr201](https://forum.dynare.org/letter_avatar_proxy/v4/letter/j/58956e/32.png) [@jrr201](https://forum.dynare.org/u/jrr201)\ **Post date:** [27 March 2009 16:23 UTC](https://forum.dynare.org/t/ramsey-yet-again/986/10 "2009-03-27T16:23:25Z")
Stephane, Matlab 2006 on windows. I am very grateful for your help - it is at least ueful to know that it runs. I am running it on a 2nd hand laptop, so when I get a chance I will re-format it, or use another computer. Many thanks, Jack ---
**Author:** ![stepan-a](https://forum.dynare.org/user_avatar/forum.dynare.org/stepan-a/32/6652_2.png) [@stepan-a](https://forum.dynare.org/u/stepan-a)\ **Post date:** [27 March 2009 17:08 UTC](https://forum.dynare.org/t/ramsey-yet-again/986/11 "2009-03-27T17:08:19Z")
Jack, To check if this a problem with the version of matlab, could you please copy/past the outcome of the **version** command? I need to know the exact version of your matlab. Dynare should be compatible with a matlab version released in 2006. I guess we have incidentally introduced a line of code which is incompatible with this version. Best, Stéphane. ---
**Author:** ![jpfeifer](https://forum.dynare.org/user_avatar/forum.dynare.org/jpfeifer/32/5044_2.png) [@jpfeifer](https://forum.dynare.org/u/jpfeifer)\ **Post date:** [24 July 2017 13:28 UTC](https://forum.dynare.org/t/ramsey-yet-again/986/12 "2017-07-24T13:28:59Z")
---
**Author:** ![jpfeifer](https://forum.dynare.org/user_avatar/forum.dynare.org/jpfeifer/32/5044_2.png) [@jpfeifer](https://forum.dynare.org/u/jpfeifer)\ **Post date:** [24 July 2017 13:29 UTC](https://forum.dynare.org/t/ramsey-yet-again/986/13 "2017-07-24T13:29:46Z")