 Usage:  {elo,eup,hlo,hup} = ciirboot(ahat,uhat,y0,irmax,alpha,nob)  
 
 Input:

  ahat                   estimated model parameters 
                         
  uhat                   estimated residuals 
                         
  y0                     starting values 
                         
  irmax                  maximum lead for impulse response analysis 
                         
  alpha                  significance level for confidence intervals 
                         
  nob                    number of replications for estimating the bootstrap distribution 
                         
 Output:

  elo                    lower bounds of "Efron's" confidence intervalls 
                         
  eup                    upper bounds of "Efron's" confidence intervalls 
                         
  hlo                    lower bounds of "Hall's" confidence intervalls 
                         
  hup                    upper bounds of "Hall's" confidence intervalls 
                         
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(C) MD*TECH Method and Data Technologies, 17.8.2000
