Approximate Incremental Value-at-Risk formulae provide an easy-to-use preliminary guideline for risk allocation. Both the cases of risk adding and risk pooling are examined and beta-based formulae achieved. Results highlight how much the conditions for adding new risky positions are stronger than those required for risk pooling. JEL classification: C13; D81; G11; G12.

Purpose. To establish the petrographic and chemical-technological features of coal seams formation C12 Kalmius block. Method. General scientific applied research methods were used to fulfill tasks. With help methods, macroscopic microscopic characteristics composition studied in detail, degree its recovery metamorphism was determined. chemical technological a comprehensive description quality i...

d12 d13 d10 d11 d11 d13 d11 d10 d9 d8 d4 d3 d1 d12 c13 c11 c10 c9 c6 c5 c4 c12 c8 b13 b9 b7 b6 b5 b4 b3 b2 b1 b8 a13 a11 a10 a9 a7 a6 a5 a4 a3 a2 a1 HoxA HoxB HoxC d13 d11 d10 d9 d8 d4 d3 d1 d12

YM-47522 (1) was isolated from the fermentation broth of Bacillus sp. YL-03709B as an antifungal antibiotic. The structure of 1 was elucidated by spectroscopic analyses. YM-47522 (1) consisted of C13 carboxylic acid amide and cinnamate moieties. The relative stereochemistry was also proposed on the basis of chemical transformation into a 1,3-diol acetonide and its NMR data.

We determine under which conditions three bivariate copulas C12, C13 and C23 are compatible, viz. they are the bivariate marginals of the same trivariate copula C̃, and, then, construct the class of these copulas. In particular, the upper and lower bounds for this class of trivariate copulas are determined.

We propose a method of moment estimator for a stochastic frontier model in which one of the independent variables is measured with errors. The estimator requires only minimal distributional assumption on the measurement error, has no need for additional data, and is computationally inexpensive. A Monte Carlo study and an empirical example show favorable performances by this estimator. JEL Class...

A highly functionalized intermediate in the synthesis of Taxol has been synthesized, which features the tricyclic core and the required oxygen substituents at C1, C2, C7, C10, and C13. The key step, a ring-closing dienyne metathesis (RCDEYM) reaction, has been thoroughly optimized to favor the tricyclic product over the undesired bicyclic product resulting from diene metathesis.

We show that one of the main results in Chen and Sönmez (2006, 2008) [6,7] does no longer hold when the number of recombinations is sufficiently increased to obtain reliable conclusions. No school choice mechanism is significantly superior in terms of efficiency. © 2010 Elsevier Inc. All rights reserved. JEL classification: C70; C13; C91

Both cell-to-cell and extracellular transmission of chikungunya virus infection was demonstrated in BHK21/C13 cell monolayers. The mode of virus infection may depend on the cell line. Virus transmission in L-929 and guinea pig lung cell lines was extracellular.

Using the DP4f GIAO-NMR method, the stereochemistry of hemicalide was computationally analysed, resulting in a reassignment at C18 as supported by improved NMR shift correlations with a model C13-C25 fragment 23. An advanced C16-C28 subunit 6 of this potent anticancer agent was then synthesised with the revised 18,19-syn relationship.