This paper examines the expectation theory of the term structure of in
terest rates in Australia. Bivariate vector autoregressive (VAR) analy
sis indicates that the spreads between the long-term and the short-ter
m rates are informative about changes in short rates. Moreover, the sp
read between the short-term rate and the official cash rate Granger-ca
uses changes in the cash rate. These findings imply that the monetary
authorities could influence long-term rates by intervening on the offi
cial cash rate. The results of the efficient market restrictions tests
are sensitive to the information set and the frequency of the data us
ed.