Does the growth process discriminate against older workers?

This paper seeks to gain insights on the relationship between growth and employment when considering heterogeneous agents in terms of their working horizon. Using an OECD database, our empirical estimations suggest that growth positively influences the employment rate of workers having a long working horizon (young workers) while negatively influences the employment rate of workers having a short working horizon (senior workers). We then provide theoretical foundations to this result by means of an endogenous job destruction framework a laMortensen and Pissarides (1998) where we introduce life cycle features. We show that, under the assumption of homogeneous productivity among workers, growth negatively affects the employment rate of workers having a short working horizon before retirement (senior workers) while it positively affects the employment rate of workers having a long working horizon (young workers). Numerical simulations confirm these results, however a non standard calibration is required to reproduce the elasticity values obtained in our empirical estimations

Coherent acoustic vibration of metal nanoshells

Using time-resolved pump-probe spectroscopy we have performed the first investigation of the vibrational modes of gold nanoshells. The fundamental isotropic mode launched by a femtosecond pump pulse manifests itself in a pronounced time-domain modulation of the differential transmission probed at the frequency of nanoshell surface plasmon resonance. The modulation amplitude is significantly stronger and the period is longer than in a gold nanoparticle of the same overall size, in agreement with theoretical calculations. This distinct acoustical signature of nanoshells provides a new and efficient method for identifying these versatile nanostructures and for studying their mechanical and structural properties.Comment: 5 pages, 3 figure

A Monetary Model of Business Cycle with Search on the Labor Market.

This paper studies the cyclical labor market properties of a model which can account for the Phillips and Beveridge curves. Monopolistic competition and sticky prices on the good market are introduced in a labor market search model disturbed both by technological and money supply shocks. We explain the specific propagation mechanisms on the labor market related to money supply shocks and show that they are quantitatively relevant.UNEMPLOYMENT ; BUSINESS CYCLES ; PRICES

Estimation du Modele de Croissance Neoclassique et Test de ses Proprietes Cycliques sur Donnees Francaises.

cycles economiques ; croissance economique

Hot Carriers in Semiconductors

ultrafast, GaAs, hole, ..................................................................................................................................... ............ ............ ............. ......

The R.B.C. Model Through Statistical Inference an Application on French Data.

statistics ; mathematics ; cycles economiques

Labor Productivity and Business Cycle : Can R.B.C. Models Be Saved?

labour market ; productivity ; business cycles ; economic models

Le chomage comme equilibre de flux: les modeles d'appariement.

CHOMAGE;MARCHE DU TRAVAIL

La methode des moments generalisees et ses extensions , theory et applications en macroeconomie.

THEORIE ECONOMIQUE;MACROECONOMIE