The paper explores the linkage between interest rates in Germany and t
he United States with those on other currencies within the Exchange Ra
te Mechanism (ERM) of the European Monetary System. Monthly data on mo
ney market interest rates and rolling window cointegration techniques
are used. The principal findings are that during the early part of the
sample period (1979-1995), there is widespread cointegration between
both US and German interest rates and those on other currencies in the
ERM; but during the later part of the sample, this ''worldwide'' link
age disintegrates, cointegration between German acid other ERM interes
t rates strengthening whilst that with the US disappears.