10.0 AUTOC Command                                                              
                                                                                
     The AUTOC command allows calculation of the autocorrelation and            
cross correlation of data, and differenced data for up to 8 series.  The        
traditional statistical formulas are used in contrast to the Box-Jenkins        
formulas which are used in the BJIDEN and BTIDEN commands.                      
                                                                                
     Form of the AUTOC command:                                                 
                                                                                
     B34SEXEC AUTOC options parameters$                                         
          VAR  var1 var2 ...   $                                                
      B34SEEND$                                                                 
                                                                                
The VAR sentence is required.                                                   
                                                                                
AUTOC options:                                                                  
                                                                                
     AUTO   - Calculate autocorrelations only.                                  
                                                                                
     CROSS  - Calculate cross correlations only.                                
                                                                                
     BOTH   - Calculate the autocorrelations and cross correlations.            
                                                                                
              Note that if CROSS or BOTH are given, there must be an            
              even number of series given in the VAR sentence.                  
                                                                                
AUTOC parameters:                                                               
                                                                                
    DIF=n     Sets differencing.                                                
                                                                                
              n=0  No differencing. This is the default.                        
              n=1  Up to first differencing.                                    
              n=2  Up to second differencing.                                   
              n=3  Only first differencing.                                     
              n=4  Only second differencing.                                    
                                                                                
                                                                                
    PERIOD=j  Number of periods of autocorrelations and cross                   
              correlations. The max value of PERIOD = 60.  If PERIOD is         
              not set, B34S sets to maximum of 60 and (NOOBS/4).                
                                                                                
    IBEGIN=n1 Sets the observation number for the first time period.            
              Default=1.                                                        
                                                                                
    IEND=n2   Sets the last time period.  Default = last observation in         
              current dataset.                                                  
                                                                                
VAR sentence:                                                                   
                                                                                
     The VAR sentence lists B34S variables to be used in the analysis. A        
maximum of 8 variables is allowed.  The number of B34S series names             
supplied must be even if the CROSS or BOTH options are used.                    
                                                                                
Sample AUTOC setup:                                                             
                                                                                
B34SEXEC AUTOC BOTH PERIOD=36$                                                  
      VAR X1 X2 X3$                                                             
      B34SEEND$