The results of past research on the long-run stationarity of money dem
and has been mixed. We explore the possibility that these mixed result
s are related to the aggregate nature of standard measures of money by
investigating the disaggregated money components to test for long-run
stationarity. A stochastic trends model for a vector of disaggregated
monetary measures is estimated. Our findings indicate that only the t
ime deposit component shows consistent evidence of cointegration. Sinc
e time deposits represent two-thirds of M2, this may be the reason why
past research has found marginal support for M2 stationarity, but lim
ited support for narrower monetary aggregates.