In this paper we develop a test of the joint null hypothesis of parameter stability and a unit root within an ADF style autoregressive specification whose entire parameter structure is potentially subject to a structural break at an unknown time period. The maintained underlying null model is a...

This paper examines how energy-output ratios in Fiji have responded to the energy crises and in particular if they have declined after the shocks. The expectation is that energy efficiency should improve after the oil shocks. For this purpose we used at first a few simpler procedures and then...

The demand for money (M1) for the USA is estimated with annual data from 1960-2008 and its stability is analyzed with the extended Gregory and Hansen (1996b) test. In addition to estimating the canonical specification, alternative specifications are estimated which include a trend and additional...