The problem of model selection of a univariate long memory time series is investigated once a semi parametric estimator for the long memory parameter has been used. Standard information criteria are not consistent in this case. A Modified Information Criterion (MIC) that overcomes these...

The use of factor analysis for instrumental variable estimation when the number of instruments tends to infinity is analysed. In particular, the focus is on situations where many weak instruments exist and/or the factor structure is weak. Theoretical results, simulation experiments and empirical...

The problem of structural change justifiably attracts considerable attention in econometrics. A number of different paradigms have been adopted, ranging from structural breaks which are sudden and rare, to time-varying coefficient models, which exhibit structural change more frequently and...