eWOM & Referrals in Social Network Services

If a few decades ago the development of the Internet was instrumental in the interconnection between markets, nowadays the services provided by Web 2.0, such as social network sites (SNS) are the cutting edge. A proof of this trend is the exponential growth of social network users. The main objective of this work is to explore the mechanisms that promote the transmission and reception (WOM and referrals) of online opinions, in the context of the SNS, by buyers of travel services. The research includes some research lines: technology acceptance model (TAM), Social Identification Theory and Word-of-Mouth communication in virtual environment (eWOM). Based on these theories an explicative model has been proposed applying SEM analysis to a sample of SNS users’ of tourist service buyers. The results support the majority of the hypotheses and some relevant practical and theoretical implications have been pointed out for tourist managers

E-Learning and gender

This study is to examine gender differences and the adoption of technology in tertial education students. We have used TAM model to measure the acceptance and use of elearning of the respondents. ANOVA and Partial Least Squares (PLS) was used, specifically, the PLS multi-group analysis, to compare differences between groups. In summary, results show that students’ behavior of acceptance of e-learning technology do not manifest statistically significant differences between women and men

Purchase intention of specialty coffee

The main aims of this study are: (1) to test whether the theory of planned behavior (TPB) is useful to explain the intention to purchase specialty co ee; (2) to analyze whether people more involved in social responsibility could manifest a di erent response from those not so interested in this matter concerning specialty co ee. The sample is composed of 489 specialty co ee consumers from Brazil. The statistical tool for testing the measurement and structural model was partial least squares. Then a multigroup analysis was performed to meet the second objective; the software SmartPLS was utilized. The main contributions of this study are that we can explain the intention to use specialty coffee in a sample of Brazilian consumers using the classical TPB model. Moreover, we demonstrate the moderating e ect of consumer perception of corporate social responsibility in this general model

Towards to personal profiles of online video game players: application of POS-PLS on UTAUT model

There are diverse segmentations of online players in the literature. Most of them are proposed a priori, and there are no segmentations based on the acceptance of technology and the personal values of the players. The foremost purpose of this study is to obtain a clustering of online video games players, founded on UTAUT model, and to describe the subsequent segments consistent with the personal values of Schwartz. The measurement model and the structural model was analyzed with partial least squares (PLS). Subsequently, the POS-PLS technique has been devoted to inspect unobserved heterogeneity and to find players’ segments. Four segments are obtained from the statistical tools

Exploration of the factors that affect the adoption of social networking services by generation y in Chile

The purpose of this paper is to study the adoption of social networking services (SNS) for a sample of members belonging to the Generation Y in Chile. The study used an adapted technology acceptance model (TAM) to measure the acceptance and use of SNS of the 173 respondents (111 women and 62 men). The basic TAM was enhanced with three antecedents of perceived usefulness: social identity, telepresence and altruism. Structural equation modeling has been applied to test the proposed model. Results show that a version of TAM model explains the adoption of SNS by Generation Y in Chile.El propósito de este trabajo es estudiar la adopción de los servicios de redes sociales (SRS) en una muestra de miembros pertenecientes a la Generación Y en Chile. El estudio utilizó una adaptación del modelo de aceptación de tecnología (TAM) para medir la aceptación y el uso de los SRS en 173 encuestados (111 mujeres y 62 hombres). El modelo TAM básico fue en riquecido con tres antecedentes de la utilidad percibida: identidad social, telepresencia, y altruismo. La técnica de modelado de ecuaciones estructurales se utilizo para probar el modelo propuesto. Los resultados muestran que la versión del modelo TAM explica la adopción de la SRS por la Generación Y en Chile.O propósito deste trabalho é estudar a adoção dos serviços de redes sociais (SRS) em uma amostra de membros pertencentes à Geração Y no Chile. O estudo utilizou uma adapta- ção do modelo de aceitação de tecnologia (TAM) para medir a aceitação e o uso dos SRS em 173 entrevistados (111 mulheres e 62 homens). O modelo TAM básico foi enriquecido com três antecedentes da utilidade percebida: identidade social, telepresença, e altruísmo. A técnica de modelagem de equações estruturais foi utilizada para provar o modelo proposto. Os resultados mostram que a versão do modelo TAM explica a adoção da SRS pela Geração Y no Chile

Synthesis of IAN-type N,N-Ligands via Dynamic Kinetic Asymmetric Buchwald-Hartwig Amination

The Pd-catalyzed coupling of racemic heterobiaryl bromides, triflates, or nonaflates with aryl/alkyl primary amines using QUINAP as the ligand provides the corresponding axially chiral heterobiaryl amines with excellent yields and enantioselectivities. Reactivity and structural studies of neutral and cationic oxidative addition intermediates support a dynamic kinetic asymmetric amination mechanism based on the labilization of the stereogenic axis in the latter and suggest that coordination of the amine to the Pd center is the stereodetermining step.Ministerio de Ciencia e Innovación CTQ2013-48164-C2-1-P, CTQ2013-48164-C2-2-P, RYC-2013-12585 for A.R.European FEDER FundsJunta de Andalucía 2012/FQM 1078

Social network communications in chilean older adults

The growth of older adults in new regions poses challenges for public health. We know that these seniors live increasingly alone, and this impairs their health and general wellbeing. Studies suggest that social networking sites (SNS) can reduce isolation, improve social participation, and increase autonomy. However, there is a lack of knowledge about the characteristics of older adult users of SNS in these new territories. Without this information, it is not possible to improve the adoption of SNS in this population. Based on decision trees, this study analyzes how the elderly users of various SNS in Chile are like. For this purpose, a segmentation of the di erent groups of elderly users of social networks was constructed, and the most discriminating variables concerning the use of these applications were classified. The results highlight the existence of considerable di erences between the various social networks analyzed in their use and characterization. Educational level is the most discriminating variable, and gender influences the types of SNS use. In general, it is observed that the higher the educational level, the more the di erent social networking sites are used

Synthesis of IAN-type N,N-Ligands via Dynamic Kinetic Asymmetric Buchwald-Hartwig Amination

The Pd-catalyzed coupling of racemic heterobiaryl bromides, triflates, or nonaflates with aryl/alkyl primary amines using QUINAP as the ligand provides the corresponding axially chiral heterobiaryl amines with excellent yields and enantioselectivities. Reactivity and structural studies of neutral and cationic oxidative addition intermediates support a dynamic kinetic asymmetric amination mechanism based on the labilization of the stereogenic axis in the latter and suggest that coordination of the amine to the Pd center is the stereodetermining step.Peer Reviewe

Influencia del Género en la Percepción y Adopción de e-Learning: Estudio Exploratorio en una Universidad Chilena

Basado en el Modelo de Aceptación Tecnológica (TAM), el objetivo del presente estudio es explorar las diferencias de género en la adopción de la tecnología e-learning para los estudiantes universitarios in Chile. Un análisis multigrupo, basado en Partial Least Squares (PLS), se utilizó para comparar las diferencias entre mujeres y hombres. Los resultados indican que en una muestra de estudiantes de una universidad chilena, la conducta de aceptación de la tecnología de elearning, primero, coincide con el modelo TAM, y en segundo lugar, no se observaron diferencias estadísticamente significativas entre mujeres y hombres.Based on the Technology Acceptance Model (TAM), the objective of this study is to explore gender differences in adopting e-learning technology for university students in Chile. A multigroup analysis, based on Partial Least Squares (PLS), was used to compare the differences between women and men. The results indicate that in a sample of students of a Chilean University, the conduct of technology acceptance of e-learning, firstly, coincides with the TAM model, and secondly, it isn't statistically significant difference between women and men

La efectividad del permiso por puntos en España. La importancia del refuerzo de la ley con la adecuada combinación de acciones de vigilancia y control.

El pasado mes de julio se cumplieron 3 años de aplicación de la ley de permiso por puntos en el marco de un importante descenso de la siniestralidad en las carreteras españolas, que ha superado la expectativa creada a partir del objetivo numérico del PESV 05-08, de reducción del número de víctimas mortales en un 40% hasta el 2008. En este trabajo se presenta el análisis de los efectos de la aplicación del permiso por puntos, además de otros factores. Para el análisis se han utilizado modelos ARIMA de intervención. La variable respuesta es el número mensual de víctimas mortales a 24 horas en carretera, desde enero de 1995 hasta octubre de 2009 (178 observaciones). Con los modelos ARIMA de intervención se ha analizado la influencia de la introducción del sistema de permiso por puntos en España y su contribución a la reducción del número de víctimas mortales en carretera, mediante la introducción de una variable dicotómica que toma el valor 0 antes de la fecha de implementación de la correspondiente ley y 1 a posteriori. Adicionalmente y en virtud del período de análisis, que se extiende hasta octubre de 2009, se han introducido otras variables dicotómicas de control para modelar otros efectos, como la entrada en vigor de la Reforma del Código Penal (con efectos desde el 1 noviembre 2007) , la intensificación de medidas de seguridad vial desde enero de 2004 (con efecto desde el 1 de mes, denominada cambio de nivel de la serie temporal) y el cambio de la movilidad (a través del consumo de combustible) desde agosto de 2008 hasta octubre de 2009. En el ajuste de los modelos ha sido necesario incluir otros efectos más puntuales para modelar el comportamiento especial observado en los meses de julio y agosto de 2006 y 2007 inclusive y el comportamiento atípico del mes de noviembre de 2007 y septiembre de 2008. De las estimaciones realizadas, la introducción de la norma ha sido muy beneficiosa y, a juicio de los autores, la evolución de las medidas de vigilancia y control, que se analizan en el presente trabajo, ayudan a explicar la intensidad de los efectos de la medida legislativa del permiso por puntos y, lo que es más importante, su aparente permanencia en el tiempo