We employ smooth transition models to test the null hypothesis of a unit root in time series on U.S. and U.K. monthly inflation beginning in 1957. Under the alternative hypothesis the test allows for structural change from level-stationarity to difference stationarity. For both countries the...

This paper presents econometric evidence on whether the founding of the Federal Reserve in 1914 caused a structural change from level-stationarity to difference-stationarity in U.S. and U.K. short-term nominal interest rates. We develop new econometric tests that allow for parameter transitions...