The effect of occupation-specific brain drain on human capital

This paper tests the hypothesis of a beneficial brain drain using occupation-specific data on migration from developing countries to OECD countries around 2000. Distinguishing between several types of human capital allows to assess whether the impact of high-skilled south-north migration on human capital in the sending economies differed across occupational groups requiring tertiary education. We find a robust negative effect of the incidence of high-skilled emigration on the level of human capital in the sending countries, thereby rejecting the hypothesis of a beneficial brain drain. The negative effect was significantly stronger for professionals - the occupational category with the largest incidence of south-north migration and the highest educational requirements - than for technicians and associate professionals. --International migration,Occupation-specific brain drain,Human capital,Transferability of skills,Beneficial brain drain

A mixed method for Dirichlet problems with radial basis functions

We present a simple discretization by radial basis functions for the Poisson equation with Dirichlet boundary condition. A Lagrangian multiplier using piecewise polynomials is used to accommodate the boundary condition. This simplifies previous attempts to use radial basis functions in the interior domain to approximate the solution and on the boundary to approximate the multiplier, which technically requires that the mesh norm in the interior domain is significantly smaller than that on the boundary. Numerical experiments confirm theoretical results

Metastable states as a key to the dynamics of supercooled liquids

Computer simulations of a model glass-forming system are presented, which are particularly sensitive to the correlation between the dynamics and the topography of the potential energy landscape. This analysis clearly reveals that in the supercooled regime the dynamics is strongly influenced by the presence of deep valleys in the energy landscape, corresponding to long-lived metastable amorphous states. We explicitly relate non-exponential relaxation effects and dynamic heterogeneities to these metastable states and thus to the specific topography of the energy landscape

The hp-BEM with quasi-uniform meshes for the electric field integral equation on polyhedral surfaces: a priori error analysis

This paper presents an a priori error analysis of the hp-version of the boundary element method for the electric field integral equation on a piecewise plane (open or closed) Lipschitz surface. We use H(div)-conforming discretisations with Raviart-Thomas elements on a sequence of quasi-uniform meshes of triangles and/or parallelograms. Assuming the regularity of the solution to the electric field integral equation in terms of Sobolev spaces of tangential vector fields, we prove an a priori error estimate of the method in the energy norm. This estimate proves the expected rate of convergence with respect to the mesh parameter h and the polynomial degree p