Identifying a technological style in the making of lime plasters at Teopancazco (Teotihuacan,México)

The aim of this article is to focus on the technology of archeological plasters at Teotihuacan (Central Mexico), from the Classic Period (200–650 A.D.), focusing in the study of Teopancazco, a neighborhood center in the city. Petrographic and chemical analyses by OM, SEM-EDS, and LA-ICP-MS were conducted to characterize samples from different constructive phases and sectors of the neighborhood center, to determine the provenance of the raw materials employed in the manufacturing (e.g., volcanic glass shards) and to assess whether a shift occurred in the manufacturing of plasters and in the procurement strategies of raw materials during the different phases. The results of the analyses show that almost no changes occurred in the making of the plaster during more than four centuries and allow us to consider the presence of a technological style in their manufacture, which is characterized by the making of plaster by mixing lime with volcanic glass shards, which in the case of Teopancazco were derived from the Altotonga (Veracruz) magmatic system. The data at our disposal suggest that this style was developed in Teopancazco and later introduced throughout the city of Teotihuacan in the Early Xolalpan phase (A.D. 350), although we still do not know whether the provenance of the raw materials is the same. The wide distribution of this technological tradition could be due to the technological properties of the materials and/or the influence of the intermediate elite who ruled over Teopancazco. The paper confirms that the study of material culture and technology sheds light on broader cultural aspects of ancient societies.     

Can Institutional Reforms Reduce Corruption? Economic Theory and Patron–Client Politics in Developing Countries

The ‘anti‐corruption consensus’ of the dominant development paradigm sees corruption as a governance failure and maintains that graft can be reduced or eradicated through appropriate institutional reforms, such as strengthening the judiciary, designing corruption‐proof regulatory regimes, and establishing anti‐corruption agencies. This article aims to cast doubt on the theoretical rationale of this family of anti‐corruption interventions. The neo‐classical paradigm that informs the consensus is based on a set of unsatisfactory idealizations, which undermine the explanatory power of mainstream economic models of corruption. Drawing on insights from economic sociology and anthropology, the article develops an account of the relationship between corruption, cultural norms and patron–client politics in developing countries. This account shows that corruption is embedded in socio‐cultural structures that are endemic to the process of transition to industrial capitalism — a transition that all developing countries are arguably undergoing, however haltingly. This insight clarifies the theoretical limitations of mainstream corruption economics and provides a framework for constructing more empirically adequate explanations of corruption levels in specific countries. It also suggests that substantially reducing, let alone eradicating, corruption in the developing world may not be possible without fundamentally rethinking the existing set of anti‐corruption strategies and techniques.     

Dynamical Assessment of the Work Conditions of Reinforcement Tie-Rods in Historical Masonry Structures

Tie-rods are essential structural elements, which have been employed for centuries in masonry historical buildings, either during the construction or in successive strengthening interventions, with the aim of containing dangerous horizontal actions. The actual work conditions of these tie-rods, which are strongly influenced by their load history, are difficult to be quantified theoretically, and an effective method for their measure is of great importance in order to ensure the efficiency of these elements during the time and the stability of the entire building. Common measurements are often carried out adopting models based upon significant simplifications, like, for example, hinges at the extremities. These assumptions, rarely represent the real work conditions for anchorages. In this work, a non-destructive testing method is presented, based upon sophisticated dynamical models that can take into consideration many of the circumstances neglected by the simplified models. Four case studies are extensively described, trying to embrace the most common situations in term of peculiar features of the building, structural configuration, and load history. The discussion of the results yields the safety margin of the rod with respect to the material failure and provides important indications about the overall stability of the whole building.     

Plasters from Different Buildings of the Sacred Precinct of Tenochtitlan (Mexico City): Characterization And Provenance

In this work, we present the results of the characterization of 20 lime plaster samples taken from the Sacred Precinct of Tenochtitlan (Mexico City), the ancient capital of the Aztec empire. The samples come from different buildings of this precinct (A, B and D) and from the west façade of phase VI of the Templo Mayor pyramid. The objective of the work is to characterize the plaster samples, to understand the raw materials used, and to evaluate the presence of similarities and differences among the samples in the building techniques and raw materials employed. All the samples were studied with OM, SEM–EDS and LA–ICP–MS. The study provided evidence of the plastering and replastering practice in the same constructive phases. The results of the analyses showed the existence of important similarities and differences among buildings and constructive phases in the Sacred Precinct. In order to understand the provenance of the limestone used in the plasters, the lumps and the binder of the samples were analysed. The results were compared with those of the limestone outcrops located in central Mexico. The provenance study showed that all the limestone used in the construction of the analysed buildings of Tenochtitlan's Sacred Precinct comes from the Tula region.     

Immigrant entrepreneurs,diasporas, and exports

This paper demonstrates the positive effect of immigrant entrepreneurs on manufacturing exports over and above that of diasporas. Using small-scale regional administrative data, our instrumental variable estimates of export gravity models imply that ceteris paribus, that is, holding constant the total number of immigrants, the expected protrade effect of a migrant becoming an entrepreneur amounts to an average increase of US$5,946 in the export flows toward her country of origin. Besides these dyadic effects, immigrant entrepreneurs unlike nonentrepreneurial immigrants raise a region's overall competitiveness and export flows toward other destinations as well.     

Towards Planning for a Mobile Society: Mobile and Residential Populations and the Performance of Places

As contemporary society is increasingly structured around highly diverse flows of people, goods, and information, mobile populations will contribute more and more to the economic, environmental and social performance of their destinations. However, planning is largely focused on residential populations and their contribution to the performance of places and hardly pays attention to the implications of people on the move for these places. In this study, we propose an alternative approach towards the assessment of the performance of places by comparing mobile and residential populations. An empirical analysis of the Netherlands National Travel Survey suggests that planning could profit by analysing mobile populations and exploring the desirability and feasibility of influencing their decisions.     

Para-masticatory wear facets and their functional significance in hunter–gatherer maxillary molars

The mastication of tough and hard foods combined with the extensive use of teeth as tools, have been considered possible antemortem causes in determining enamel microfractures of the tooth crown. This phenomenon, known as dental chipping, has been found in different fossil hominins and in several pre-historic and historic human populations who adopted different subsistence strategies. However, little is understood of the mechanism, function and the formation of dental chipping.     

Behind the scenes of public funding for performing arts in Italy: hidden phenomena beyond the rhetoric of legislation

This paper focuses on how Italian performing arts organizations were funded between 2003 and 2005. How does policy regulate the financing system for performing arts? What are the underlying logics that govern financing choices? In this paper the authors move beyond the simple examination of formal policies by analysing the funding data and organizational routines of the ministerial offices responsible for the allocation of grants. The authors implemented a multi‐method research methodology consisting of document analysis, in‐depth interviews, and quantitative analysis of funding data. The main findings can be summarized as follows. First, funds are continuously allocated to the same group of organizations. Second, although rigid, the system is imbued by a ‘rhetoric of the project’. Third, the system does not reward innovation. In conclusion, only by studying how the law is actually implemented can one capture the choices that underlie financing actions, and thus unravel unanticipated outcomes and inconsistencies between rhetoric and conduct.