Hs. Lee et Pl. Siklos, A NOTE ON THE CRITICAL-VALUES FOR THE MAXIMUM-LIKELIHOOD (SEASONAL) COINTEGRATION TESTS, Economics letters, 49(2), 1995, pp. 137-145
In this paper the finite sample distributions of the Johansen procedur
e for cointegration tests using seasonally unadjusted data are present
ed and compared with the asymptotic distributions. In particular, we c
onsider the data generating process which contains unit roots at the s
easonal and zero frequencies, as well as a trend.