China has witnessed rapid increases in the skill premium over last few decades. In this paper, we study short-run effect of capital goods imports on China. The surge imports, which embody advanced technology, can explain rising demand for We exploit regional variations import exposure stemming from initial differences structure and instrument growth using exchange rate movements. A city at 75th...

For a finite group G, we introduce the complete suboperad $Q_G$ of categorical G-Barratt-Eccles operad $P_G$. We prove that $P_G$ is not finitely generated, but generated and genuine $E_\infty$ G-operad (i.e., it $N_\infty$ includes all norms). G cyclic order 2 or 3, determine presentations object conclude with discussion algebras over $Q_G$, which call biased permutative equivariant categories.

1. For a long time, dioecious plants have been a model system for understanding the interactions between plants and herbivores. Differences in growth rate and, consequently, investment in defence between sexes may lead to skewed sex ratios due to differential herbivory. 2. In this study we evaluated the applicability of this idea to polar willow ( Salix polaris ), which in the study site, Svalb...

1. Abstract Sex differentiation is generally more labile in gonochoristic fish than it is, for example, in birds and mammals. Environmentally induced sex reversal is therefore often possible and creates genotype-phenotype mismatches that can be useful in population management. Interestingly, sex chromosomes of fish are typically not significantly decayed, i.e. all types of offspring of sex-reve...

In the development of the nervous system, the migration of neurons driven by chemotactic cues has been known since a long time to play a key role. In this mechanism, the axonal projections of neurons detect very small differences in extracellular ligand concentration across the tiny section of their distal part, the growth cone. The internal transduction of the signal performed by the growth co...