This study was carried out to compare grains of barley (Hordeum vulgare L. distichon) regarding contents and compositions of 5-n-alkylresorcinols. Mixtures of resorcinol homologues were isolated from acetone extracts from five barley cultivars. These polyketide metabolites were identified by chromatographic and spectroscopic means. The content and homologue patterns among different varieties we...

This paper proposes minimum distance estimation procedures for the slope coefficients and location parameter in randomly censored regression models that are used in duration and competing risk models. The proposed procedure generalizes existing work in terms of weakening the restrictions imposed on the distribution of the error term and the censoring variable. Examples of such generalizations i...

Lipid analysis of aquatic plants from lakes on Mt. Kenya, E. Africa, revealed that non-emergent (submerged and ̄oating-leaved) species displayed enhanced abundances of mid-chain length, C23 and C25 n-alkanes. In contrast, the emergent aquatic plants had n-alkane distributions similar to those of the terrestrial vegetation, typically dominated by the long-chain length homologues (>C29). A proxy r...

It is well known that, in a multinomial probit, only the covariance matrix of the location and scale normalized utilities are identified. In this study, we explore the relation between these identifiable parameters and the original elements of the covariance matrix, to find out what can be learnt about the correlations between the stochastic components of the non-normalized utilities. We show t...

The inconclusiveness of findings from various studies on Nigeria the effect crude oil price fluctuation stock market has led to an argument in literature, thus necessitating further exploration subject. This study examines variations selected performance variables using monthly frequency data covering January 1997 December 2016. Variance decomposition, impulse response analysis, and VAR estimat...

Using a structural model of demand for automobile engine variants, this paper finds that there is second-degree price discrimination: markups increase with engine size. Still, average markups are lower than when models have just one engine. The paper develops the first empirical demand framework suitable for markets with variants. There is an unobserved product characteristic and a consumer-spe...

With a new method we measured the saturated very long chain fatty acids in the plasma of adrenoleukodystrophy (ALD) hemizygotes, ALD heterozygotes, and controls. ALD hemizygotes showed increased levels of hexacosanoate (C26 fatty acid) which represented 0.081 +/- 0.0066% (SEM) of total fatty acids, compared to 0.015 +/- 0.0032% in the controls. C25, C24, and C23 fatty acids were also increased,...

This article investigates power and size of some tests for exogeneity of a binary explanatory variable in count models by conducting extensive Monte Carlo simulations. The tests under consideration are Hausman contrast tests as well as univariate Wald tests, including a new test of notably easy implementation. Performance of the tests is explored under misspecification of the underlying model a...

Using the National Educational Longitudinal Study data, this paper examines the role of pre-market abilities, as well as other determinants, on young men’s self-employment decision. Our results indicate that cognitive and noncognitive abilities are two important, in opposing directions, predictors of selfemployment. We also …nd that cognitive and noncognitive abilities di¤er in their malleabili...