619 resultados para Sélection de portefeuille
Resumo:
The steadily accumulating literature on technical efficiency in fisheries attests to the importance of efficiency as an indicator of fleet condition and as an object of management concern. In this paper, we extend previous work by presenting a Bayesian hierarchical approach that yields both efficiency estimates and, as a byproduct of the estimation algorithm, probabilistic rankings of the relative technical efficiencies of fishing boats. The estimation algorithm is based on recent advances in Markov Chain Monte Carlo (MCMC) methods— Gibbs sampling, in particular—which have not been widely used in fisheries economics. We apply the method to a sample of 10,865 boat trips in the US Pacific hake (or whiting) fishery during 1987–2003. We uncover systematic differences between efficiency rankings based on sample mean efficiency estimates and those that exploit the full posterior distributions of boat efficiencies to estimate the probability that a given boat has the highest true mean efficiency.
Resumo:
No abstract.
De l'origine des espèces par sélection naturelle ou des lois de transformation des êtres organisés /
Resumo:
Índices.
Resumo:
Mode of access: Internet.
Resumo:
Goldsmiths'-Kress no. 12338.2.
Resumo:
Contains reproductions of original t.-p.
Resumo:
This paper looks at the notion of scale through the negative polarity and free-choice interpretations of arbitrary-selection expressions such as any. These interpretations rest on a scalar model, which explains why they often get associated with the same item cross-linguistically. A scalar model does not seem to emerge readily in the problematic imperatives of the type Pick any card, where the arbitrary selection item differs from its other uses by its existential value and absence of qualitative dimensions. These differences come from a choice over non-distinguishable entities left to the interlocutor. Yet, since this choice is exerted against the whole set of contextual entities, a scalar model seems to stand, for this and other problematic imperative uses.
Resumo:
The dimension qualitative of arbitrary selection undefined anyone and any what is envisaged in this article. It provides a procedure to identify jobs which are demonstrating an interpretation qualitative despite changes to which this reading is submitted. Contexts that promote and discourage this interpretation undergo an examination detailed. This gives rise to the proposal based test review on some argumentatifs linkages. Tests and contexts operate with (in) compatibility with qualitative reads the causes are envisaged. The ability to dispose of the qualitative nature of an interpretation provides advanced identification procedure constitute a new result that represents a necessary condition for an explanatory of semantics the axiology.
Resumo:
Mémoire numérisé par la Direction des bibliothèques de l'Université de Montréal.
Resumo:
Thèse numérisée par la Direction des bibliothèques de l'Université de Montréal.
Resumo:
Mémoire numérisé par la Direction des bibliothèques de l'Université de Montréal.
Resumo:
Thèse numérisée par la Direction des bibliothèques de l'Université de Montréal.
Resumo:
Thèse numérisée par la Direction des bibliothèques de l'Université de Montréal.
Resumo:
Mémoire numérisé par la Direction des bibliothèques de l'Université de Montréal.