Rubio de Francia's extrapolation theory: estimates for the distribution function

Let $T$ be an arbitrary operator bounded from $L^{p_0}(w)$ into $L^{p_0, \infty}(w)$ for every weight $w$ in the Muckenhoupt class $A_{p_0}$. It is proved in this article that the distribution function of $Tf$ with respect to any weight $u$ can be essentially majorized by the distribution function of $Mf$ with respect to $u$ (plus an integral term easy to control). As a consequence, well-known extrapolation results, including results in a multilinear setting, can be obtained with very simple proofs. New applications in extrapolation for two-weight problems and estimates on rearrangement invariant spaces are established too.Comment: 29 page

Public and private sector wages interactions in a general equilibrium model

This paper develops a dynamic general equilibrium model in which the public and the private sector interact in the labor market. Previous studies that analyze the labor market effects of public sector employment and wages have mostly assumed exogenous rules for public wage and public employment. We show that theories that equalize wages with marginal products in the private sector can rationalize the interaction of public and private sector wages when extended to accommodate a non-trivial government sector/public sector union that endogenously determines public employment and wages. Our model suggests a positive correlation between public and private sector wages. Any increase in tax revenues, coupled with the existence of a positive public-private sector wage gap, makes working in the public sector an attractive option. Thus, a positive neutral productivity shock increases public and private sector wages. More interestingly, even a private-sector specific productivity shock spills-over to the public sector, increasing public wages. These facts lend some support to the wage leading role of the private sector. Nevertheless, at the same time, a positive shock to public sector wages would lead to an increase in private sector wages, via the flow of workers from the private to the public sector. JEL Classification: C32, J30, J51, J52, E62, E63, H50Labor market, public employment, public wages, Trade Unions

Estudio del flujo turbulento cargado con partículas sólidas a través de un canal

En el presente trabajo se estudia el flujo turbulento cargado con partículas sólidas a través de un canal. Para ello se utiliza un programa comercial de dinámica de fluidos tomputacional, cuyo esquema de discretización es el de volúmenes Guitas. La fase fluida (aue) se estudia mediante un enfoque Euleriano y la fase dispersa (partículas sólidas) mediante un enfoque Lagrangiano, respecto al acoplamiento hidrodinámico entre las fases, solo se considera la acción de la fase fluida sobre la fase dispersa (one-way coupling) para una concentración másica determinada. Se desarrolla un estudio de convergencia de malla y los resultados numéricos se comparan con datos experimentales

Nondiffractive sonic crystals

We predict theoretically the nondiffractive propagation of sonic waves in periodic acoustic media (sonic crystals), by expansion into a set of plane waves (Bloch mode expansion), and by finite difference time domain calculations of finite beams. We also give analytical evaluations of the parameters for nondiffractive propagation, as well as the minimum size of the nondiffractively propagating acoustic beams.Comment: 7 figures, submitted to J. Acoust. Soc. A

THE ROLE OF QMS IN THE RELATIONSHIP BETWEEN INNOVATION CLIMATE AND PERFORMANCE

The emergence of new global competitors, the convergence of high-technology industries and the increasing speed and cost of technological development promise an increasingly uncertain environment for organizations, making adaptation to changes in the environment a central theme in the study of the organization for both organization theory and strategic management. This paper is thus seeks principally to verify that, while innovation and QM alone do not possess the qualities required to provide organizations with sustainable competitive advantages, the bundle of innovation and QM together with other resources and competencies will allow organizations to obtain a competitive advantage and adapt to their environment. The results show that the factors determining innovation—such as resistance to change, cohesion, and workload pressures—have repercussions for the firms’ capacity to adapt to their environment, and that a QM context facilitates this adaptation. Finally, we can conclude that a climate of support for innovation is positively related to the organization’s performance

Un estudio empírico del impacto de las iniciativas actuales de gestión de la calidad sobre la innovación y flexibilidad organizativa

In recent years, managers have opted for implementing Quality Management in their firms. The market offers different alternatives for QM implementation (EFQM, ISO, Six Sigma, etc.). Benefits of each initiative, varies from case to case. This article designs a criterion for choosing among four alternatives (Quality Control, EFQM, Six Sigma and ISO 9000), according to the different effects that QM elements included in each initiative, have on innovation and flexibility capabilities. To do so, using a stepwise regression with dummy variables, it analyses 234 European organizations. The research concludes that QM elements included on Quality Control and ISO standards have the same effect on administrative and technical innovation, and operational and strategic flexibility. QM elements included in EFQM model have a deeper impact on administrative and technical innovation, and strategic flexibility. And finally, QM elements included in Six Sigma methodology have a deeper impact on operational flexibility