Re: st: maximum likelihood no observations error

[Nick Cox <njcoxstata@gmail.com>]

-error 2000- means values all missing, so if the problem is not in  
your input data, it presumably is within your program. My suggestion  
was to insert one or more -list- commands within your program.

Nick

On 13 Mar 2013, at 00:24, andylaustata <andylaustata@126.com> wrote:

> Thanks for your advice Nick, and sorry for my thoughtlessness. Poi  
> (2002) stands for "Poi, B. P. 2002. From the help desk: Demand  
> system estimation.  Stata Journal 2(4): 403--410". Also, I have  
> double checked all the variables that I used and none of them has  
> any missing values.
>
> Besides, many apologies to anyone who might have considered helping  
> me, but found it impossible to implement my ado program, because I  
> did not send my do code in the first place. So, I am copying my do  
> code here. As you can see, the do code will load food.dta into your  
> stata from http://www.stata-press.com/data/r11/food. So, expect for  
> some copying and pasting, it is all ready for anyone interested  
> enough to quickly run my code and see how the problem comes up.
>
> Cheers,
> Ou
>
> use http://www.stata-press.com/data/r11/food, clear
>
> glo NEQN = 4   /* Number of equations. */
>
> ml model d0 RDS1 () /beta_v /theta_v /ga_v1 /ga_v2  /*
>                     */ /ga_v3 /ta_v1 /ta_v2 /ta_v3 /et_v1 /et_v2 / 
> et_v3
>
> ml check
>
> ml search
>
> ml maximize
>
>
>
>
>
> At 2013-03-12 20:17:21,"Nick Cox" <njcoxstata@gmail.com> wrote:
> > Generic advice on Statalist, which you should have read in the FAQ.
> > Please give full references, not minimal references such as Poi
> > (2002).
> >
> > Specific advice on your problem. Even experienced programmers often  
> > do
> > not have much success in just looking at a program to find bugs. It's
> > best to be proactive. -list- the data at some point and then identify
> > what is not present that should be, or missing. If your real dataset
> > is big, it might be best to test the program on a small subset.
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