Re:st: maximum likelihood no observations error

[andylaustata <andylaustata@126.com>]

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.
>
>Nick


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