This paper develops a new approach to the problem of testing the existence of a level relationship between a dependent variable and a set of regressors, when it is not known with certainty whether the underlying regressors are trend- or first-difference stationary. The proposed tests are based...

This paper provides a synthesis and further development of a global modelling approach introduced in (Journal of Business and Economic Statistics, Vol. 22 (2004), pp. 129-162), where country-specific models in the form of VARX* structures are estimated relating a vector of domestic variables,...</sub>

This paper comments on recent developments in the literature on the econometric analysis of international growth and convergence. It notes that panel estimates of the neoclassical model, accommodating level effects for individual countries through heterogeneous intercepts, deal with some of the...

This paper characterizes the asymptotic behaviour, as the number of assets gets arbitrarily large, of the portfolio weights for the class of tangency portfolios belonging to the Markowitz paradigm. It is assumed that the joint distribution of asset returns is characterized by a general factor...

This paper focuses on survey expectations and discusses their uses for testing and modeling of expectations. Alternative models of expectations formation are reviewed and the importance of allowing for heterogeneity of expectations is emphasized. A weak form of the rational expectations...

The potential for portfolio diversification is driven broadly by two characteristics: the degree to which systematic risk factors are correlated with each other and the degree of dependence individual firms have to the different types of risk factors. Using a global vector autoregressive...

Present value calculations require predictions of cash flows both at near and distant future points in time. Such predictions are generally surrounded by considerable uncertainty and may critically depend on assumptions about parameter values as well as the form and stability of the data...