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During the last decades, the activities of pirates have increased exponentially in Eastern Africa, with their attacks becoming considerably more violent. In addition to the intrastate and interstate conflicts, the lack of state capacity and the presence of terrorist groups, maritime piracy represents a serious and sustained threat to economic security. Indeed, from an economic point of view, pirates affect international trade through an increasing insecurity related to the prompt delivery of the goods transported. The aim of this work is to explore the main works on maritime piracy analyzed in quantitative economics. 相似文献
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Sípoli Marques MA Pinto Damasceno LM Gualberto Pereira HM Caldeira CM Pereira Dias BF de Giacomo Vargens D Amoedo ND Volkweis RO Volkweis Viana RO Rumjanek FD Aquino Neto FR 《Journal of forensic sciences》2005,50(3):587-592
A clear positive case for anabolic steroids doping was confounded by alleged urine tampering during doping control procedures. Review of the chain of custody showed no flaws, but nevertheless the athlete was adamant that the urine sample should be analyzed for DNA in order to support her contention that she was not the donor of the sample. The results obtained showed that the urine sample that scored positive for steroids contained nuclear DNA that could not be matched to the DNA obtained from the athlete's blood. On the other hand, the same urine sample contained mitochondrial DNA whose nucleotide sequences spanning the hyper variable regions HV1 and HV2 proved to be identical to those determined in mitochondrial DNA amplified from the athlete's blood. The occurrence of an extraneous genotype is compatible with exogenous nuclear DNA admixture to the athlete's urine. Alternatively, taking in consideration the mitochondrial DNA, we could not exclude that a sibling or a maternal relative of the athlete could have acted as a donor of the urine utilized for doping control and DNA analysis. Both situations point to possible tampering of the urine by the athlete. Adjudication at CAS maintained previous national and international federation decision that there was no proof of a chain of custody flaw to justify the athlete's allegation of urine substitution after collection. 相似文献
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Most state Medicaid programs, in many cases the largest fundors of long term care, reimburse nursing homes or home health agencies on negotiated flat rates. However, several states have implemented or are planning to use reimbursement methods using case-mix indices to adjust for the different variable costs (e.g., resource utilization groups, RUGs) incurred in caring for different types of patients. Advocates contend that such methods can simultaneously help contain costs and enhance access by motivating the nursing home to keep costs below predetermined rates and mitigating providers’ reluctance to admit “heavy care” residents. The numbers of such residents putatively have increased as a result of incentives in the Prospective Payment System for hospitals to more quickly discharge sicker patients. However, the potentially negative effects of case-mix reimbursement (CMR) on quality of care have not gone unnoticed, and the costs (as yet undetermined) of mechanisms to avert these effects likely are nontrivial. This paper examines the effects of CMR on cost (to states and nursing homes), access and quality. A preliminary review of the available evidence seems to indicate mixed results; yet, CMR obviously appeals to some Medicaid programs and representatives of the nursing home industry. We suggest that the allure of CMR may be due to a mistaken belief that, to borrow from Brandon (1990), such “tech fixes” obviate irksome negotiation on the part of policy elites. An alternate reimbursement policy is proposed: a negotiated prepayment, based on a facility's global budget, with periodic allocations and an end of period adjustment to compensate the provider for unanticipated costs. 相似文献
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Political ecologists have developed scathing analyses of capitalism’s tendency for enclosure and dispossession of the commons. In this context commons are analyzed as a force to resist neo-liberalism, a main site of conflict over dispossession, and a source of alternatives to capitalism. In this paper we elaborate a view of the commons as the material and symbolic terrain where performative re-articulation of common(s) senses can potentially enact counter-hegemonic socio-ecological configurations. Expressly drawing on the concepts of hegemony, “common-senses” (inspired by Antonio Gramsci) and “performativity” (developed by Judith Butler), we argue that counter-hegemony is performed through everyday practices that rearticulate existing common senses about commons. Commoning is a set of processes/relations enacted to challenge capitalist hegemony and build more just/sustainable societies insofar as it transforms and rearranges common senses in/through praxis. The paper draws on the experience of an anti-mining movement of Casa Pueblo in Puerto Rico, which for the last 35+ years has been developing a project self-described as autogestion. The discussion pays special attention to Casa Pueblo’s praxis and discourses to investigate how they rearticulate common senses with regard to nature, community and democracy, as well as their implications for counter-hegemonic politics. 相似文献
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Transaction Costs,Information Technologies,and the Choice of Marketplace among Farmers in Northern Ghana 总被引:1,自引:0,他引:1
AbstractUsing a transactions costs framework, we examine the impact of information and communication technologies (mobile phones and radios) use on market participation in developing country agricultural markets using a novel transaction-level data set of Ghanaian farmers. Our analysis of the choice of markets by farmers suggests that market information from a broader range of markets may not always induce farmers to sell in more distant markets; instead farmers may use broader market information to enhance their bargaining power in closer markets. Finally, we find weak evidence on the impact of using mobile phones in attracting farm gate buyers. 相似文献