Many applications in finance use a non-linear transformation of the variance of returns. While the sample variance is an unbiased and consistent estimator of the population variance of returns, non-linear transformations of the sample variance will be consistent but biased. For estimates of...

The authors propose a simplified multivariate GARCH (generalized autoregressive conditional heteroscedasticity) model (the S-GARCH model), which involves the estimation of only univariate GARCH models, both for the individual return series and for the sum and difference of each pair of series....

When using derivative instruments such as futures to hedge a portfolio of risky assets, the primary objective is to estimate the optimal hedge ratio (OHR). When agents have mean-variance utility and the futures price follows a martingale, the OHR is equivalent to the minimum variance hedge...

The research presented in this thesis addresses different aspects of dynamic portfolio construction and portfolio risk measurement. It brings the research on dynamic portfolio optimization, replicating portfolio construction, dynamic portfolio risk measurement and volatility forecast together....

Nationally representative data on family businesses are available in the 1998 Workplace Employee Relations Survey, alongside comparable information for other types of firms. We use these data to compare differences in the use of different consultation and communication procedures. We cover such...

Although the U.K. has a common political system, there are distinct regional differences. These differences are reflected in the outcomes of U.K. Government attempts to devise and implement innovation strategy within all parts of the U.K. Northern Ireland's (NI) regional differences are...

This study considers the determinants of whether a firm exports, undertakes R&D and/or innovates, and, in particular, the contemporaneous links between these variables using three waves of the UK Community Innovation Survey (CIS). Where appropriate, an instrumental variables procedure is...

This paper presents an overview of various models of regional growth that have appeared in the literature in the last 40 years. It considers the past, and therefore supply-side models, such as the standard neoclassical, juxtaposed against essentially demand-side approaches such as the...

Recent work (including that of the author) on the impact of FDI has been based on microlevel (i.e. firms, establishments or plants) data, since this allows much greater control when examining such issues as whether FDI plants are more productive or innovative; whether there are spillovers to...

This paper provides a survey and critique of how spatial links are taken into account in empirical analysis by applied economists/regional scientists. Spatial spillovers and spatial interrelationships between economic variables (e.g. unemployment, GDP, etc) are likely to be important, especially...