Optimal Minimum Wage in a Competitive Economy: an Alternative Modelling Approach

This paper analyzes whether a minimum wage can be an optimal redistribution policy when distorting taxes and lump-sum transfers are also available in a competitive economy. We build a static general equilibrium model with a Ramsey planner making decisions on taxes, transfers, and minimum wage levels. Workers are assumed to differ only in their productivity. We find that optimal redistribution may imply the use of a minimum wage. The key factor driving our results is the reaction of the demand for low skilled labor to the minimum wage law. Hence, an optimal minimum wage appears to be most likely when low skilled households are scarce, the complementarity between the two types of workers is large or the difference in productivity is small. The main contribution of the paper is a modelling approach that allows us to adopt analysis and solution techniques widely used in recent public finance research. Moreover, this modelling strategy is flexible enough to allow for potential extensions to include dynamics into the model.redistribution policy, minimum wage, Ramsey Problem

Registro magmático en el NE de México: una historia desde el precámbrico hasta el cenozoico

El Noreste de México cuenta con extensos y a la vez potentes afloramientos de rocas sedimentarias del Mesozoico al Cenozoico, contenidas en las provincias de la Sierra Madre Oriental, Sierra de San Carlos, Sierra de Tamaulipas, Cuenca de Burgos, etc. Si bien el registro litológico está dominado por litologías carbonatadas y pelíticas, existen complejos en los que se pueden apreciar la presencia de unidades magmáticas, tanto volcánicas como plutónicas, que permiten la interpretación de importantes procesos geodinámicos de diversas etapas entre el Precámbrico hasta el Cenozoico tardío. A continuación se describe una breve compilación de estas secuencias, que será objeto de la charla

Examining the Impact of Innovation Forms on Sustainable Economic Performance: The Influence of Family Management

The aim of this research is to explore the effect that innovation, as a potential source of sustained competitive advantage and firm growth, has on the achievement of sustainable economic performance. In particular, this paper empirically examines the influence of four innovation forms (intramural R&D, extramural R&D, product innovation, and process innovation) on firms’ sustainable economic performance, considering the moderating effect of family involvement in management. To test the hypotheses, random-effects regression analyses are applied to a longitudinal sample of 598 Spanish private manufacturing firms throughout the 2006–2015 period. The results show a negative effect of intramural and extramural R&D on sustainable economic performance and a positive effect of process innovation on sustainable economic performance. Moreover, a reinforced relationship between process innovation and sustainable economic performance is also revealed when family involvement in management acts as a moderator. The findings make several contributions to research and practice

USING DIGITAL STORIES TO IMPROVE LISTENING COMPREHENSION WITH SPANISH YOUNG LEARNERS OF ENGLISH

This paper examines the effects that digital stories may have on the understanding of spoken English by a group of 6-year-old Spanish learners. To accomplish this aim, a quasi-experimental research study was launched in six state schools in Madrid. A pre-post test design was used to investigate whether internet-based technology could improve listening comprehension in English as a Foreign Language (henceforth, EFL). Findings indicate that the experimental group outperformed the control group in the final test administered. These results raise interesting issues related to the use of technology in the context of foreign language learning. Future research which includes other age groups and digital materials and which explores other linguistic areas could further substantiate the link between Information and Communication Technology (ICT) rich environment and improved language learning

Evaluación de la resistencia adhesiva al cizallamiento de 2 sistemas adhesivos a esmalte y dentina de dientes temporales

Tesis (Cirujano Dentista)En este trabajo, se pretende comparar la resistencia adhesiva in vitro mediante pruebas de cizallamiento para sistemas adhesivos de autograbado (self-etch) y de grabado y lavado (etch-and-rinse) en esmalte y dentina de dientes temporales. Con el fin de ayudar en la búsqueda de un sistema adhesivo adecuado para este tipo de sustrato

Mariano Benlliure en la vida y en la obra de Juan Polo

Entrevista realizada al maestro escultor Juan Polo, en su casa-estudio de Fernán Núñez, con motivo de la preparación de su exposición en la Casa Museo Benlliure de Valencia, donde se le quiso honrar como último discípulo vivo del maestro valencian

Bradysia aliciae sp. nov. (Diptera: Sciaridae) from the Pleistocene of Buenos Aires, Argentina

Bradysia aliciae sp. nov .(Diptera: Sciaridae) es descripta a partir de un ala con un excepcional estado de preservación proveniente del afloramiento de Camet Norte en Buenos Aires, Argentina, con una antigüedad de 24500 años A.P. El ejemplar es el primer díptero adulto identificable que proviene de dichos depósitos.Bradysia aliciae sp. nov. (Diptera: Sciaridae) is described from an exceptionally preserved wing extracted from the Camet Norte outcrop in Buenos Aires, Argentina, dated in 24,500 years B.P. The fossil is the very first identifiable imaginal stage of Diptera that came from these deposits.Fil: Ramírez, Leonardo César. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Alonso, Cecilia P.. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Ecología, Genética y Evolución de Buenos Aires; Argentin

Propriedades psicométricas de uma escala para medir a gestão da vergonha em adolescentes (Moss-Sast)

(Ahmed, 1999) to measure shame management in adolescents in situations of aggression toward peers. The study was conducted with a sample of 700 students from public secondary schools (N= 700) located in a northwestern state municipality of Mexico. Results enabled to obtain an empirically sustainable measuring model formed by two factors: Acknowledgment and Displacement (X2 = 5.16, p= 0.27; CMIN= 1.29; GFI= .98; CFI= .99; NFI= .97; RMSEA= .05). Evidence was obtained to show that the instrument has criterion validity since it is capable to differentiate between subgroups of students with and without reports of bullying in both factors, Acknowledgment (t= 3.49, gl= 137, p< .001) and Displacement (t= 3.63, gl= 137, p< .001). It was concluded that the results strengthen the original factorial structure of the scale and show the usefulness of the same, both for inquiring about emotions related to moral development and for identifying students involved as aggressors in bullying situations.Se establecieron las evidencias de validez y confiabilidad de la adaptación del cuestionario MOSS-SAST (Ahmed, 1999) para medir el manejo de la vergüenza en adolescentes ante situaciones de agresión hacia los pares. El estudio se realizó en una muestra de estudiantes de escuelas secundarias públicas (N= 700) ubicadas en un municipio de un estado del noroeste de México. Los resultados permitieron obtener un modelo de medición empíricamente sustentable formado por nueve ítems agrupados en dos factores: Reconocimiento y Desplazamiento (c2 = 5.16, p= 0.27; CMIN= 1.29; GFI= .98; CFI= .99; NFI= .97; RMSEA= .05). El instrumento cuenta con evidencias de validez de criterio, ya que establece la diferencia en los factores de reconocimiento (t= 3.49, gl= 137, p< .001) y desplazamiento (t= 3.63, gl= 137, p< .001) en subgrupos de estudiantes con y sin reportes de bullying. Se concluyó que los resultados fortalecen la estructura factorial original de la escala y muestran su utilidad, tanto en la indagación de emociones relacionadas con el del desarrollo moral, como en la identificación de estudiantes involucrados como agresores en situaciones de bullying.Foram estabelecidas as evidências de validade e confiabilidade da adaptação do Questionário MOSS-SAST (Ahmed, 1999) para medir a gestão da vergonha em adolescentes ante situações de agressão contra os pares. O estudo foi realizado com uma amostra de estudantes do ensino fundamental e médio (N=700) de um município do noroeste do México. Os resultados permitiram obter um modelo de medição empiricamente sustentável, formado por nove itens agrupados em dois fatores: reconhecimento e deslocamento (c2 = 5.16, p= 0.27; CMIN= 1.29; GFI= .98; CFI= .99; NFI= .97; RMSEA= .05). O instrumento conta com evidências de validade de critério já que estabelece a diferença nos fatores de reconhecimento (t= 3.49, gl= 137, p< .001) e deslocamento (t= 3.63, gl= 137, p< .001) em subgrupos de estudantes com e sem relatos de bullying. Conclui-se que os resultados fortalecem a estrutura fatorial original da escala e mostram sua utilidade, tanto na indagação de emoções relacionadas com o desenvolvimento moral quanto na identificação de estudantes envolvidos como agressores em situações de bullying

Primary teachers' insights on the use of the internet in their english as a foreign language lessons: a research case study

While language teachers are progressively aware of the potential benefits of technology in foreign language instruction, one challenge they face is how to implement effective technology-based language tasks. This paper reports on the results from a case study on the instructional experience of a group of teachers in a research project aimed at investigating the effects of Internet-based instruction on six year old children’s linguistic outcome in English as a foreign language. The analysis of pre- and post- questionnaires provides data on the teachers’ expectations, achievements and the difficulties they came across when using Internet-based tasks in the EFL classroom.A la vez que el profesorado de idiomas se va concienciando de las potenciales ventajas de la tecnología en la enseñanza de lenguas extranjeras, se enfrenta al desafío de llevar a clase tareas eficaces basadas en el uso de la tecnología. Este artículo presenta los resultados de un estudio de caso sobre la experiencia de un grupo de profesores en un proyecto de investigación sobre los efectos de la enseñanza a través de Internet en la producción lingüística en inglés de niños de seis años. El análisis de los cuestionarios pre y post test proporciona datos sobre las expectativas de los profesores, sobre sus logros y las dificultades a las que se enfrentaron al llevar a clase de inglés tareas basadas en el uso de Internet.We would like to thank UAM for their financial support during the development of this research project