As mentioned by Baron, you should think deeper about the question(s) you 
would like to answer and the context of those questions.  Statistical 
analysis should hopefully also have a theoretical basis.  As for the 
voting you have mentioned.
>Q:there are six production listed below.according to your preference,the 
production
>you like most is_____,the production you secondly like is ____,and the 
third is_____.
>productionA      productionB      productionC      productionD 
productionE 
>productionF
>
>when the data is collected. i type in a stata in such format:
>
>firstlike          secondlike          thirdlike
>A                      C                   D
>E                      A                   E
>бнбнбнбнбнбнбнбнбнбнбнбнбнбн

It is very tricky to analyze, so you should be up on the theoretical 
developments of this type of voting.  Look to: The Arrow impossibility 
theorem and Condorcet's paradox.

http://en.wikipedia.org/wiki/Arrow's_impossibility_theorem
http://en.wikipedia.org/wiki/Voting_paradox

Though it doesn't seem ideal "every (unimposing) voting method which 
chooses between three or more candidates, must be either dictatorial or 
manipulable (i.e. susceptible to tactical voting)."

http://en.wikipedia.org/wiki/Gibbard-Satterthwaite_theorem


In my opinion, the statistical methods used should just be descriptive 
statistics.  Then think about what they are showing, with the 
aforementioned theorems in mind, in the context of ultimate question you 
are trying to answer.

Jason Higbee
Research Associate
Federal Reserve Bank of St. Louis
E: jason.l.higbee@stls.frb.org
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