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...a[12]*y1[t-1] + a[22]*y1[t-1] +a[23]*y1[t-1] = 0 a[12]*y1[t-1] + a[22]*y1[t-1] +a[23]*y1[t-1] = 0 therefore number of co-integrating relationship is 3 am I correct? Therefore in my understanding : if variables in a system show some co-integrating relationship thenrank should be close to zero. Am I making any mistakes? Can anyone here clarify me? Regards, Megh --------------------------------- [[alternative HTML version deleted]]