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st: panel data with irregular intervals


From   MunHeejin <siren99@live.co.kr>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: panel data with irregular intervals
Date   Tue, 10 Jul 2012 15:43:03 +0900

Good day, statalisters.

I have data of problem-solving contests.
During a contest, solvers 'irregularly' submit solutions, and then receive scores of the solutions.
The data set of a contest is as follows:
Solver Time Score Time_Taken Independent_Var1 Independent_Var2  A     1     20      1              0.5              0.7  A     4     30      3              0.7              0.8  A     5     50      1              0.2              0.1  B     3     10      3              0.5              0.2  B     7     15      4              0.7              0.6  B     8     20      1              0.2              0.4  B    10     25      2              0.1              0.5  C     1     20      1              0.8              0.9  C     4     30      3              0.5              0.2

In my opinion, general regression techniques may be not able to estimate the effects of independent variables on Score and Time_Taken due to extremely unbalanced data set.
How can I estimate the effects of independent variables on Score and Time_Taken?

Many thanks. 		 	   		  
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