# The problem of s.d. and t-stat in the result of estimation

**URL:** https://forum.dynare.org/t/the-problem-of-s-d-and-t-stat-in-the-result-of-estimation/1185
**Category:** Dynare help (legacy posts)
**Created:** [30 September 2009 10:42 UTC](https://forum.dynare.org/t/the-problem-of-s-d-and-t-stat-in-the-result-of-estimation/1185 "2009-09-30T10:42:01Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![yshguo](https://forum.dynare.org/letter_avatar_proxy/v4/letter/y/ed655f/32.png) [@yshguo](https://forum.dynare.org/u/yshguo)
#### Post date: [30 September 2009 10:42 UTC](https://forum.dynare.org/t/the-problem-of-s-d-and-t-stat-in-the-result-of-estimation/1185/1 "2009-09-30T10:42:01Z")

</div>

deal all

I encountered the followong problem when I estimated the mode, the value of s.d. and t-stat are Inf and zero respectively, why? Can anyone help me on that? I attached my mod file. Thanks ! the version of dynare is 4.0.4, matlab is 7.4.0 (R2007a).

Objective function at mode: -482.688696

RESULTS FROM MAXIMUM LIKELIHOOD  
parameters  
Estimate s.d. t-stat

```
     gam 0.0961 Inf 0.0000
   alpha 0.6182 Inf 0.0000
  rho_pi -0.1339 Inf 0.0000
   rho_y 0.1744 Inf 0.0000
  rho_mu 1.3219 Inf 0.0000
     chi 1.3559 Inf 0.0000
     phi 0.9985 Inf 0.0000
      nu 0.9000 Inf 0.0000
   rho_a 0.2578 Inf 0.0000
   rho_e 0.6853 Inf 0.0000
   rho_x 0.3786 Inf 0.0000
   rho_b -0.2002 Inf 0.0000

```

standard deviation of shocks  
Estimate s.d. t-stat

```
     e_r 0.0110 Inf 0.0000
     u_x 0.0874 Inf 0.0000
     u_a -0.0833 Inf 0.0000
     u_e 0.1655 Inf 0.0000
     u_b 0.0655 Inf 0.0000

```

Total computing time : 0h03m59s  
[ciml\_nofa.mod](https://forum.dynare.org/uploads/default/original/1X/760595581775d6eda6c93c6283158c11c99d710b.mod) (1.67 KB)