The assumption of linearity is tested using six statistical tests for the US unemployment rate and four employment sectoral shares growth rates; construction, finance, manufacturing and trade. An AR(p) model was used to remove any linear structure from the series. Strong evidence of non-linearity was found for the unemployment rate and the sectoral shares across the six statistical tests.

AIMS To evaluate different algorithms used to analyse retinal nerve fibre layer thickness (RNFL) data obtained by scanning laser polarimetry, in order to compare their relative abilities to discriminate between patients with glaucomatous localised nerve fibre layer defects and normal subjects. METHODS 48 eyes of 48 glaucomatous patients with localised RNFL defects and 53 eyes of 53 healthy su...

Aims: To evaluate different algorithms used to analyse retinal nerve fibre layer thickness (RNFL) data obtained by scanning laser polarimetry, in order to compare their relative abilities to discriminate between patients with glaucomatous localised nerve fibre layer defects and normal subjects. Methods: 48 eyes of 48 glaucomatous patients with localised RNFL defects and 53 eyes of 53 healthy su...

Today, knowledge economies are a key asset for global competitiveness. Biotechnology is a knowledge-driven sector because it consists of knowledge working on knowledge to create value, decoding in genomics and proteomics being paradigmatic knowledge-based economic activity. Like many other new economy industries such as information and communications technology, new media, and advanced finance,...

PURPOSE To determine the effects of age on global and sectoral peripapillary retinal nerve fiber layer (RNFL), macular thicknesses, and optic nerve head (ONH) parameters in healthy subjects using optical coherence tomography (OCT). DESIGN Retrospective, cross-sectional observational study. PARTICIPANTS A total of 226 eyes from 124 healthy subjects were included. METHODS Healthy subjects w...

The hypotheses of sectoral return rates on regulating capital either gravitating around or converging towards a common value is tested on data for various OECD countries by adopting two panel varying coefficient approaches. Our null hypotheses receive some empirical support, that turns out to be stronger once focusing on manufacturing industries only. We offer a meta-analytic framework to asses...

An analysis is made of the spectral line shapes of τ Bootis using high resolution (0.026 Å) and high signal-to-noise (S/N ≈ 400) data in an effort to confirm the planet hypothesis for this star. Changes in the line shape are quantified using spectral line bisectors and line residuals. We detect no variations in either of these quantities above the level of the noise in the data. One spectral li...

We investigate a multi-factor extension of the asymptotic single risk factor (ASRF) model that underlies the capital charges of the “Basel II Accord”. In this extended model, it is still possible to derive closed-form solutions for the risk contributions to Value-at-Risk and Expected Shortfall. As an application of the risk contribution formulae we introduce a new concept for a diversification ...