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2. The buyers’ perspective on security design: Hedge funds and convertible bond call provisions

Author

Grundy, B, Verwijmeren, Patrick, Grundy, B, and Verwijmeren, Patrick

Abstract

We provide evidence that security design reflects the interplay of capital supplier and security issuer preferences. While call provisions have historically been the default option in convertible security design, only a minority of post-2005 issues are callable. Because hedge funds dominate the market for new convertibles today and because convertible arbitrage is less risky without callability, the recent diminution in the frequency of call provisions in new convertible bond issues illustrates the importance of the preferences of the suppliers of capital in security design.

Published
2018

3. Microstructure of sputter-deposited Co/Si multilayer thin films.

Author

Fallon[a], J. M., Faunce, C. A., and Grundy[b], P. J.

Subjects
SPUTTERING (Physics), COBALT, SILICON, TRANSMISSION electron microscopy, ELECTRON diffraction
Abstract

Presents the results of an investigation by transmission electron microscopy, electron diffraction, x-ray diffraction and x-ray reflectivity of sputter-deposited Co/Si multilayers. Retention of elemental regions in structures with individual layer thicknesses; Occurrence of significant intermixing with alloy formation through differentiation in multilayers below five nanometers.

Published
2000

11. Predicting population gene frequency from sample data

Author

Lewis, R. M., Grundy, B., Kuehn, L. A., Lewis, R. M., Grundy, B., and Kuehn, L. A.

Abstract

With an increase in the number of candidate genes for important traits in livestock, effective strategies for incorporating such genes into selection programmes are increasingly important. Those strategies in part depend on the frequency of a favoured allele in a population. Since comprehensive genotyping of a population is seldom possible, we investigate the consequences of sampling strategies on the reliability of the gene frequency estimate for a bi-allelic locus. Even within a subpopulation or line, often only a proportion of individuals will be genotype tested. However, through segregation analysis, probable genotypes can be assigned to individuals that themselves were not tested, using known genotypes on relatives and a starting (presumed) gene frequency. The value of these probable genotypes in estimation of gene frequency was considered. A subpopulation or line was stochastically simulated and sampled at random, over a cluster of years or by favouring a particular genotype. Line was simulated (replicated) 1000 times. The reliability of gene frequency estimates depended on the sampling strategy used. With random sampling, even when a small proportion of a line was genotyped (0·10), the gene frequency of the population was well estimated from the across-line mean. When information on probable genotypes on untested individuals was combined with known genotypes, the between-line variance in gene frequency was estimated well; including probable genotypes overcame problems of statistical sampling. When the sampling strategy favoured a particular genotype, unsurprisingly the estimate of gene frequency was biased towards the allele favoured. In using probable genotypes the bias was lessened but the estimate of gene frequency still reflected the sampling strategy rather than the true population frequency. When sampling was confined to a few clustered years, the estimation of gene frequency was biased for those generations preceding the sampling event, particularly wh

Published
2004

12. Responses to selection for lean growth in sheep

Author

Simm, G., Lewis, R. M., Grundy, B., Dingwall, W. S., Simm, G., Lewis, R. M., Grundy, B., and Dingwall, W. S.

Abstract

This paper reports the selection responses achieved, and related results, following 9 years of index selection for lean growth in Suffolk sheep. The breeding goal of the index used comprised carcass lean weight and carcass fat weight at a constant age, with relative economic values of + 3 and –1 per kg. The selection criteria were live weight (LWT), ultrasonic fat depth (UFD) and ultrasonic muscle depth (UMD) adjusted to a constant age of 150 days. By year 9, responses in LWT, UFD and UMD in both sexes, as judged by the divergence between selection and control line performance, amounted to 4·88 kg, –1·1 mm and 2·8 mm respectively; these responses are between 7 and 15% of the overall means of the traits concerned. Although selection was originally on index scores based on phenotypic records, the retrospective analyses reported here used the mixed model applications of residual maximum likelihood to estimate parameters and best linear unbiased prediction to predict breeding values. The statistical model comprised fixed effects plus random effects accounting for direct additive, maternal additive and temporary environmental variation. Estimated genetic trends obtained by regressing estimated breeding values on year of birth were similar to annual responses estimated by comparing selection and control line means. Estimates of direct heritabilities were 0·054, 0·177, 0·286, 0·561 and 0·410 for birth weight (BWT), weaning weight (WWT), LWT, UFD and UMD respectively. Corresponding estimates of maternal heritabilities were 0·287, 0·205, 0·160, 0·083 and 0·164. Phenotypic correlations between all pairs of traits were positive and usually moderately high. There were low negative direct additive correlations between BWT and WWT, and between BWT and LWT, but higher positive maternal additive correlations between all other pairs of weight traits.

Published
2002

30. POSTOPERATIVE NOCTURNAL HYPOXIA

Author

Grundy, B., primary, Hardcastle, J., additional, Crampton, C., additional, McGorray, S., additional, Castenholz, R., additional, Boysen, P., additional, Hocking, M., additional, Souba, W., additional, and Rout, R., additional

Published
1992
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38. Authors

Author

Wyckoff, H. L, primary, Greebler, Paul, additional, Bauer, Douglas C., additional, Poncelet, Claude G., additional, Chester, C. V., additional, Chester, R. O., additional, Struve, James E., additional, Tsoulfanidis, Nick, additional, Calza-Bini, A., additional, Cosoli, G., additional, Filacchioni, G., additional, Lanchi, M., additional, Nobili, A., additional, Rocca, U., additional, Rotoloni, P. L., additional, McKee, J. M., additional, Vissers, D. R., additional, Nelson, P. A., additional, Grundy, B. R., additional, Berkey, E., additional, Taylor, G. R., additional, Holmes, John T., additional, Haroldsen, Grant O., additional, Holmes, J. T., additional, and Bartholme, L. G., additional

Published
1974
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