Using 15 years worth of additional data, a study is carried out to explore the extent to which the results in Rothman (1991) still hold. The analysis shows that such a comparison is very much dependent on whether: (i) 1-quarter differences or 4-quarter differences are used to construct the...

Using 15 years worth of additional data, a study is carried out to explore the extent to which the results in Rothman (1991) still hold. Using raw unfiltered data, the aggregate unemployment rate appears to be a Neftci-type symmetric process. But use of two detrending procedures produces strong...