Exploring the links between tourism and quality of institutions

This paper introduces a new perspective on the impacts of tourism on host communi-ties by analyzing the links between tourism specialization and quality of institutions. Our research has two principal aims: firstly, to test the significance and sign of this relationship; and secondly, to explore the channels through which tourism could affect institutional qual-ity. To this end, an econometric analysis is conducted using a sample of 92 countries over the period 1995-2014. The results indicate that there is a significant and positive associa-tion between tourism specialization and institutional quality. Moreover, this relation can be explained through three main channels: level of income, income inequality, and economic freedom.Este trabajo aporta una nueva perspectiva sobre los impactos del turismo analizando las relaciones entre la especialización turística de un país y la calidad de sus instituciones. La investigación plantea dos objetivos: (1) testar empíricamente la significatividad y signo de dichas relaciones y (2) explorar los canales a través de los que se producen. Realizamos un análisis econométrico para 92 países y 20 años. Los principales resultados indican la existencia de una asociación significativa y positiva entre turismo y calidad institucional que se produce principalmente a través de tres canales: nivel de renta, distribución de la renta y libertad económica

Ethnolinguistic Diversity and Education: a Successful Pairing

The many growing migratory flows render our societies increasingly heterogeneous. From the point of view of social welfare, achieving all the positive effects of diversity appears as a challenge for our societies. Nevertheless, while it is true that ethnolinguistic diversity involves costs and benefits, at a country level it seems that the former are greater than the latter, even more so when income inequality between ethnic groups is taken into account. In this respect, there is a vast literature at a macro level that shows that ethnolinguistic fragmentation induces lower income, which leads to the conclusion that part of the difference in income observed between countries can be attributed to their different levels of fragmentation. This paper presents primary evidence of the role of education in mitigating the adverse effects of ethnolinguistic fractionalization on the level of income. While the results show a negative association between fragmentation and income for all indices of diversity, the attainment of a certain level of education, especially secondary and tertiary, manages to reverse the sign of the marginal effect of ethnolinguistic fractionalization on income level. Since current societies are increasingly diverse, these results could have major economic policy implications

Do tolerant societies demand better institutions?

The increasing ethnic heterogeneity that many societies are experiencing could be interpreted as a detrimental phenomenon, since empirical literature exists that indicates that higher levels of ethnic fractionalization induce higher levels of corruption. This paper aims to show the role of tolerance in overcoming this harmful effect of ethnic heterogeneity. To this end, a sample of 86 countries is tested for a positive association between ethnic fractionalization and corruption. It is then shown that tolerance offsets this effect through both direct and indirect effects on corruption. In order to analyse the indirect effects, the level of income and the freedom of the press are selected as channels, since these represent two determinants of corruption that are linked to tolerance. Moreover, tolerance and corruption have been modelled as composites. Consequently, Partial Least Squares path modelling (PLS-PM) has been used. For our sample, an index of tolerance towards immigrants and people of different race and an index of corruption are constructed, for which several sources are jointly utilised. Our results appear to indicate that the adverse effect of ethnic fractionalization on corruption is offset by tolerance, which reduces corruption not only directly but also indirectly through the level of income and the freedom of the press

Learning from failures in an emblematic building in Valencia, Spain

[EN] On many occasions advances have been made in science and engineering thanks to the knowledge gained from failures. In the particular case of structural engineering, the study of actual failures makes it possible to advance and define new theories, concepts and designs. Some examples are the changes and improvements that appeared after some of the "classical" failures such as the Ronan Point building, Quebec Bridge, Murrah Federal Building, Tacoma Narrows Bridge and the World Trade Center. This paper describes a teaching method used with structural engineering students at the Universitat Politecnica de Valencia based on the study of cases of damage to buildings in Valencia, Spain. Due to its special characteristics, one of the buildings studied is the Principe Felipe Science Museum. Some of its main characteristics are: 1) it is one of Valencia's emblematic buildings, 2) its considerable dimensions required huge quantities of concrete, 3) it has a complex structure and an innovative architectural design, 4) the wide variation in the type of damage detected, which make it a particularly valuable teaching aid. The most important damage detected has been classified and described during the visits to the Principe Felipe Science Museum. The damage mechanisms are widely diverse and include: those due to the behaviour of the concrete itself (e.g. shrinkage and early age thermal cracking), those due to the presence of damp, those whose origin can be traced back to the construction phase, and others due to corroded reinforcement and to the loads acting on the structure. The paper has a double value since on one hand it describes a highly successful teaching aid for the training of experts in structural engineering, while on the other it classifies and describes the existing damage in one of the most important modern buildings in Spain and perhaps in Europe.Adam, JM.; Buitrago, M. (2018). Learning from failures in an emblematic building in Valencia, Spain. Engineering Failure Analysis. 92:418-429. doi:10.1016/j.engfailanal.2018.06.023S4184299

Effects of sudden failure of shoring elements in concrete building structures under construction

[EN] The most frequently used technique to construct reinforced concrete (RC) building structures is the shoring or propping of successive floors, in which the slabs are supported by the shores until the concrete acquires sufficient strength. A significant number of structural failures have been reported during construction in recent years leading in some cases to the progressive collapse of the whole structure. The collapse often starts with the local failure of a single element which could be due to errors in design or construction and/or due to accidental events. Although this is a well-recognized problem, studies on the effects of local failure in the shoring elements on the integrity of the shoring-structure system have not been carried out in the past. In this work advanced numerical finite element models were carried out of a three-storey RC building and its shoring system. Four scenarios of local failure were considered: sudden removal of a (1) shore, (2) joist and (3) complete shore line; and (4) incorrect selection of shores. The results indicated that the structure-shoring system was able to develop al- ternative load paths without dynamic amplification effects due to the large stiffness and redundancy of the system without compromising the integrity of the structure but leading to significant damage in the concrete slabs. Design recommendations are also given based on the results from this study, which pretend to be the first study to focus on the structural response and damage of a building structure under construction after the sudden failure of one or more shores.The authors would like to express their gratitude to the Spanish Ministry of Education, Culture and Sport for funding received under: (a) the FPU Program [FPU13/02466] and complementary funding received for a stay at the University of Surrey (UK), and (b) the Mobility Program (Salvador de Madariaga 2017) of the Promotion of Talent and Employability within the state's Research & Innovation Program 2013-2016 [PRX17/00302]. The authors would like to thank Dr. P. Olmati who developed the prelimiundernary FE model of the structure at the operational stage as part of a project sponsored by the EPSRC Impact Acceleration Account held by the University of Surrey (grant ref: EP/ K503939) linked with a previous project funded by the EPSRC (grant ref: EP/K008153/1).Buitrago, M.; Sagaseta, J.; Adam, JM. (2018). Effects of sudden failure of shoring elements in concrete building structures under construction. Engineering Structures. 172:508-522. https://doi.org/10.1016/j.engstruct.2018.06.052S50852217

On the nature of the hard X-ray sources SWIFTJ1907.3-2050, IGRJ12123-5802 and IGRJ19552+0044

The INTEGRAL and Swift hard X-ray surveys have identified a large number of new sources, among which many are proposed as Cataclysmic Variables (CVs). Here we present the first detailed study of three X-ray selected CVs, Swift J1907.3-2050, IGRJ12123-5802, and IGRJ19552+0044 based on XMM-Newton, Suzaku, Swift observations and ground based optical and archival nIR/IR data. Swift J1907.3-2050 is highly variable from hours to months-years at all wavelengths. No coherent X-ray pulses are detected but rather transient features. The X-ray spectrum reveals a multi-temperature optically thin plasma absorbed by complex neutral material and a soft black body component arising from a small area. These characteristics are remarkably similar to those observed in magnetic CVs. A supra-solar abundance of nitrogen could arise from nuclear processed material from the donor star. Swift J1907.3-2050 could be a peculiar magnetic CV with the second longest (20.82 h) binary period. IGRJ12123-5802 is variable in the X-rays on a timescale of ~7.6 h. No coherent pulsations are detected, but its spectral characteristics suggest that it could be a magnetic CV of the Intermediate Polar (IP) type. IGRJ19552+0044 shows two X-ray periods, 1.38 h and 1.69 h and a X-ray spectrum characterized by a multi-temperature plasma with little absorption.We derive a low accretion rate, consistent with a CV below the orbital period gap. Its peculiar nIR/IR spectrum suggests a contribution from cyclotron emission. It could either be a pre-polar or an IP with the lowest degree of asynchronism.Comment: Accepted for publication in MNRAS. 14 pages, 11 figures, 5 table

Measuring social diversity in economic literature: an overview for cross-country studies

Over recent decades, the growing research on social diversity at country level has striven to explain several outcomes such as the differences in income across countries and the origins of civil conflicts. The literature employs a wide range of indices to measure social diversity that hinders the comparison of the results with respect to their effects on socio-economic performance. This paper intends to disentangle such a variety of indices and their applications. To achieve this goal, we have collected the social diversity indices used in cross-country studies, and have ascertained not only their similarities and differences, and the relationships between them, but also their main applications. Studies at country level have been selected that construct their own indices and that make their databases available. We show that the dimension and the index chosen to measure social diversity, the level of disaggregation of the social groups, and the geographical unit of analysis explain the tangle of indices and the mixed results achieved by the literature focused on socio-economic outcomes of social diversity. This paper enables the suitable evaluation and comparison of the effects of social diversity and the selection of the appropriate index depending on the analysis to be carried out