This paper discusses the I(2) model with breaks in the deterministic component and illustrates the model with an analysis of German and US prices, exchange rates, and interest rates in the period 1975-1999. It provides new results on the likelihood ratio test of overidentifying restrictions on...

We have recently proposed an alternative approach to economic analysis, which we call Imperfect Knowledge Economics (IKE). Although IKE builds on the methodology of contemporary macroeconomics by modeling aggregate outcomes on the basis of mathematical representations of individual decision...

This paper discusses a number of likelihood ratio tests on long-run relations and common trends in the I(2) model and provide new results on the test of overidentifying restrictions on β’xt and the asymptotic variance for the stochastic trends parameters, α⊥1: How to specify deterministic...