منابع مشابه
How Dead are Dead Links ?
Research papers usually contain a significant number of links to other resources. For the most part, they reference other printed research papers, but there are also a non-trivial number of links to resources on the World Wide Web. Unlike printed research papers, references to WWW resources may become invalid after time. The server containing the page may be taken offline, be temporarily unavai...
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Credit ratings are commonly used by lenders to assess the default risk, because every credit is connected with a possible loss. If the probability of a default is above a certain threshold, a credit will not be provided. The purpose of this paper is to test whether credit ratings contribute valuable information on the creditworthiness of firms. Employing a large sample of Western German manufac...
متن کاملWhen Are Agenda Setters Valuable?
Why do industries donate money to legislative campaigns when roll-call votes suggest that donors gain nothing in return? I argue that corporate donors may shape policy outcomes by influencing powerful agenda setters in the early stages of lawmaking. On the basis of a new dataset of more than 45,000 individual state-legislator sessions (19882012), I document how agenda control is deemed valuable...
متن کاملAre Some Lives More Valuable?
A theoretical model of the ethical preferences of individuals is tested by conducting a choice experiment on safety-enhancing road investments. The relative value of a saved life is found to decrease with age, such that the present value of a saved year of life is almost independent of age at a pure rate of time preference of a few percent, and a saved car driver is valued 17-31% lower than a p...
متن کاملAre Light Gluinos Dead?
Not yet. ALEPH’s recent exclusion limit employs an aggressive determination of theoretical uncertainties using a simplified application of the Bayesian method. The validity of their analysis can be evaluated by its further implications, such as contradicting the existence a b quark and requiring relations between hadronic event-shape observables which are not observed. Traditional error estimat...
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ژورنال
عنوان ژورنال: Nature
سال: 1990
ISSN: 0028-0836,1476-4687
DOI: 10.1038/347334a0