Spatial relationships between two globose cacti (Mammillaria mammillaris (L) Karsten and Melocactus schatzlii Till & Gruber) and two dominant mimosoid shrubs (Acacia farnesiana (Willd.) L. and Prosopis julifora DC.) were evaluated in two habitats (cactus thicket and thornscrub) of a…

La suffocation est une forme d’asphyxie dans laquelle l’oxygène ne peut atteindre le sang. Il existe divers types de suffocation dont la suffocation par confinement/ environnementale, les étouffements externe et interne, et les asphyxies traumatique/ positionnelle. La littérature scientifique sur…

This survey presents within a single model three theories of decentralization of decision-making within organizations based on private information and incentives. Renegotiation, collusion, and limits on communication are three sufficient conditions for decentralization to be optimal., Cet article présente, dans…

We analyze an alternative to the standard rationalizability requirement for observed choices by considering non-deteriorating selections. A selection function is a generalization of a choice function where selected alternatives may depend on a reference (or status quo) alternative in addition…

El propósito de este trabajo es proponer una Base Regional de Recursos Minerales para la provincia de La Pampa partiendo de una propuesta previa en la que se puntualizaba la oferta local de recursos líticos en elÁrea del Curacó y…

We identify conditions under which preferences over sets of consumption opportunities can be reduced to preferences over bundles of \"commodities\". We distinguish ordinal bundles, whose coordinates are defined up to monotone transformations, from cardinal bundles, whose coordinates are defined up…

In this article we study the effect of uncertainty on an entrepreneur who must choose the capacity of his business before knowing the demand for his product. The unit profit of operation is known with certainty but there is no…

We provide a survey of the literature on ranking sets of objects. The interpretations of those set rankings include those employed in the theory of choice under complete uncertainty, rankings of opportunity sets, set rankings that appear in matching theory,…

In this paper, we test a version of the conditional CAPM with respect to a local market portfolio, proxied by the Brazilian stock index during the 1976-1992 period. We also test a conditional APT model by using the difference between…

The effect of long discussions between commissioners with divergent views on certain issues is obvious in the report: it is more oriented towards the short term than expected. Undue attention was paid to trade liberalization with the U.S., a region…