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The content of ecstasy tablets has been changing over the years, and nowadays 3,4‐methylenedioxymethamphetamine (MDMA) is not always present in the tablets. The aim of this study was to investigate the chemical composition in the seized tablets labeled as ecstasy. We analyzed samples from 150 different seizures made by Sao Paulo's State Police by gas chromatography–mass spectrometry. MDMA was present in 44.7% of the analyzed samples, and another twenty different active substances were identified in these tablets, such as caffeine, 2C‐B, piperazines, amphetamines, phencyclidine, and others. Methamphetamine was present in 22% of these samples. The results demonstrate a huge shift in the pattern of trafficking of synthetic drugs, where MDMA has been replaced in tablets mostly by illicit psychoactive substances, in a clear attempt to bypass the law. The great variability in the tablets composition may lead to an increased risk of drug poisoning.  相似文献   
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The potential democratizing effect of political decentralization reforms has been a matter of substantial theoretical and empirical debate. This article analyzes the effect of local democratic institution building on the political attitudes and behavior of citizens living in small towns in Uruguay. More specifically, using a natural experiment design, this research seeks to establish the causal impact of recently established elections of local authorities on individuals' political engagement. It develops a comparative case study analyzing the consequences of this institutional innovation in two towns. It shows that individuals from the town where citizens have the opportunity to elect their local authorities have more positive attitudes toward politics than those from the town without such elections.  相似文献   
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This article builds a simple theoretical model for the optimal expected length of a franchise contract. The main outcome is that fixed specific investment positively impacts contract duration confirming previous theoretical conjectures. Additionally, other variables such us the price–cost margin of the franchise, the brand name or the discount factor also play a relevant role. The empirical analysis using a large sample of franchises operating in Spain confirms the main conclusions of the model. However, the connection found between investment and duration, although statistically robust, is weak from an economic point of view. This result suggests the possibility that, in general, most franchisees are not in equilibrium because of the high standardization of this contract term across franchises. In these cases, the expectation of renewal is likely to be a crucial element of adjustment.  相似文献   
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Comparison of fingernail ridge patterns of monozygotic twins   总被引:1,自引:0,他引:1  
The ridge patterns on the fingernails of corresponding fingers of a pair of twins were compared microscopically and found to be readily distinguishable from one another. Based on blood grouping in six blood group systems (ABO, Rhesus, Ss, Duffy, Kidd, and Kell), the probability that the twins were monozygotic was calculated to be 89.1%.  相似文献   
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In view of urgent social and environmental problems, it is important to understand the political dynamics that may promote sustainable development and to identify the agents that make changes in this direction happen. We examine the role and authority of a new type of actor that has recently emerged on the global stage—the social entrepreneur, who tackles social and ecological problems with entrepreneurial means. We consider them as agents that perform functions and provide services that have been considered to be the sole authority of states. For instance, the provision of water services has long been considered an exclusive task of the state. The water sector therefore serves as a good example to explore how these agents come up with their own missions and political agendas. Via an illustrative sample of social entrepreneurs from around the world, we explore their relation to water governance in general and the hydraulic mission in particular. We propose that their innovative potential serves as their main source of authority. Their local embeddedness along with their educational efforts, participatory goals, and accreditation as “social entrepreneur” provide additional sources of authority.  相似文献   
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The major issues of medico-legal relevance in fatal falls from a height are the manner of death and the reconstruction of the event. We present a peculiar case of a fatal fall from a height of about 9 m, involving a 27-year-old woman. At the death scene investigation, no suicide notes, housebreaking marks, or signs of fight were found, thus weakening both the suicide and homicide hypotheses. Combining circumstantial, autopsy and toxicology data, the kinematic analysis of the jump/fall, and the histological evidence of a myocardial sarcoidosis involving the left ventricle, we hypothesized that the young woman might have accidentally fallen from the window because of a sudden loss of consciousness related to cardiac disease undiagnosed during life. We believe that our brief report is a good example of the powerful additional information that histological investigations can offer for reconstructing the dynamics of the event in falls from a height and other traumatic fatalities.  相似文献   
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Numerous empirical studies have investigated the direction of causality between democracy and economic growth (as well as the level of income per capita), but this empirical work has been paralleled by relatively few theoretical models that endogenize the institutional structure of the regime. Moreover, the different types of autocratic regimes have received relatively little attention. This paper develops a game-theoretic model of endogenous economic policy in autocratic regimes facing a revolt or an insurgency. In this model, there are three players: the regime, the rebels, and the masses. There are three stages in the game. In the first stage, the regime determines the level of infrastructure and the tax rate. In the second stage, the masses allocate their time between production and helping the rebels. In the third stage, the regime and the rebels simultaneously choose their fighting effort levels in a contest, in which the probability of survival of the regime is determined. It is found that autocratic regimes facing a revolt endogenously sort themselves into “tinpot” regimes that maximize their consumption at the cost of their survival, and (weak and strong) “totalitarian” regimes that maximize their probability of survival at the expense of their consumption. Empirical implications of the model are derived, and the relevance of the model to public policy is discussed.  相似文献   
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