16,567 research outputs found
Mass administrations of antimalarial drugs.
Administration of antimalarial drugs to whole populations has been used as a malaria-control measure for more than 70 years. Drugs have been administered either directly as a full therapeutic course of treatment or indirectly through the fortification of salt. Mass drug administrations (MDAs) were generally unsuccessful in interrupting transmission but, in some cases, had a marked effect on parasite prevalence and on the incidence of clinical malaria. MDAs are likely to encourage the spread of drug-resistant parasites and so have only a limited role in malaria control. They could have a part to play in the management of epidemics and in the control of malaria in areas with a short transmission season. To reduce the risk of spreading drug resistance, MDAs should use more than one drug and, preferably include a drug, such as an artemisinin, which has a gametocidal effect
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How Useful are High-Precision Delta ?17O Data in Defining the Asteroidal Sources of Meteorites?: Evidence from Main-Group Pallasites, Primitive and Differentiated Achondrites
High-precision oxygen isotope analysis is capable of revealing important information about the relationship between different meteorite groups. New data confirm that the main-group pallasites are from a distinct source to either the HEDs or mesosiderites
Financing Development: The Role of Information Costs
How does technological progress in financial intermediation affect the economy? To address this question a costly-state verification framework is embedded into a standard growth model. In particular, financial intermediaries can invest resources to monitor the returns earned by firms. The inability to monitor perfectly leads to firms earning rents. Undeserving firms are financed, while deserving ones are under funded. A more efficient monitoring technology squeezes the rents earned by firms. With technological advance in the financial sector, the economy moves continuously from a credit-rationing equilibrium to a perfectly efficient competitive equilibrium. A numerical example suggests that finance is important for growth.
Financing Development: The Role of Information Costs
To address how technological progress in financial intermediation affects the economy, a costly-state verification framework is embedded into the standard growth model. The framework has two novel ingredients. First, firms differ in the risk/return combinations that they offer. Second, the efficacy of monitoring depends upon the amount of resources invested in the activity. A financial theory of firm size results. Undeserving firms are over financed, deserving ones under funded. Technological advance in intermediation leads to more capital accumulation and a redirection of funds away from unproductive firms toward productive ones. With continued progress, the economy approaches its first-best equilibrium. An extended version of the paper containing some quantitative analysis is available at: http://ssrn.com/abstract=996263financial intermediation, economic development, costly state verification, firm size
Financing development: the role of information costs
To address how technological progress in financial intermediation affects the economy, a costly state verification framework is embedded into the standard growth model. The framework has two novel ingredients. First, firms differ in the risk/return combinations that they offer. Second, the efficacy of monitoring depends upon the amount of resources invested in the activity. A financial theory of firm size results. Undeserving firms are over financed, deserving ones under funded. Technological advance in intermediation leads to more capital accumulation and a redirection of funds away from unproductive firms toward productive ones. With continued progress, the economy approaches its first-best equilibrium.Economic development ; Intermediation (Finance)
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The Fountain Hills meteorite: A new CBa chondrite from Arizona
We describe a new member of the CR chondrite clan and compare it to other members of this group
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Mineralogy and Geochemistry of Shergottite RBT 04262
This abstract presents mineralogical and geochemical data on newly discovered shergottite RBT 04262 and compares it with other known shergottites
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