 Usage:  output=panstats(z,{T})  
 
 Input:

  z                      NT x {2+} + k Matrix, dataset 
                         
  T                      scalar, number of time periods for a BALANCED Dataset 
                         IMPORTANT: No column for the Index of Individuals! 
                         (Optional, only for a Dataset with the same T 
                         for all Individuals = BALANCED PANEL) 
                         
 Output:

  output                 string, output table with summary statistics 
                         
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(C) MD*TECH Method and Data Technologies, 17.8.2000
